Waste Heat Recovery, Storage and Thermal Supply System for Low-Temperature Methanol Unloading of Multi-Cargo Carriers

Abstract

The waste heat recovery, storage, and heat supply system for the unloading of low-temperature methanol from heterogeneous cargo carriers recovers waste heat generated from heterogeneous cargo carriers that alternately transport carbon dioxide and methanol, stores it in a Thermal Energy Storage System (TESS), and uses the stored thermal energy to raise the temperature of the methanol stored in a low-temperature state to an appropriate temperature for unloading. The present invention has the effect of solving the energy consumption problem that occurs during the unloading of low-temperature methanol on heterogeneous cargo carriers, while simultaneously maximizing the efficiency of waste heat utilization, thereby enabling the implementation of an eco-friendly and economical methanol unloading system.

Description

Technology Field

[0001] The present invention relates to a heat supply system, and more specifically, to a waste heat recovery, storage, and heat supply system for unloading low-temperature methanol from a heterogeneous cargo carrier that alternately transports carbon dioxide and methanol, wherein waste heat generated from the carrier is recovered and stored in a Thermal Energy Storage System (TESS), and the stored thermal energy is used to raise the temperature of the methanol stored in a low-temperature state to an appropriate temperature upon unloading. Background Technology

[0002] Recently, with the expansion of carbon neutrality policies and eco-friendly ship technologies, the demand for liquefied carbon dioxide (LCO2) carriers and methanol carriers is increasing. However, conventional carriers are based on a single cargo transport structure, which has resulted in the problem of inefficiency where they return to an empty state after one-way transport.

[0003] Therefore, in the maritime transport sector, heterogeneous cargo carriers capable of handling both liquefied carbon dioxide and methanol are being introduced recently to maximize operational efficiency.

[0004] These heterogeneous cargo carriers can improve ship operation efficiency because they can transport multiple types of cargo using the same vessel.

[0005] Liquid carbon dioxide is generally stored and transported at low temperatures, and in heterogeneous cargo carriers, methanol may also be maintained at low temperatures depending on storage and transport conditions to utilize the same cargo storage tanks.

[0006] Meanwhile, while methanol can be maintained at low temperatures during storage and transportation, port storage tanks or downstream process facilities where it is unloaded are generally operated at ambient temperatures. Therefore, it is necessary to control the temperature of the methanol to an appropriate level during the unloading process.

[0007] However, conventional heterogeneous cargo carriers focus on a cargo transport structure that alternately transports liquefied carbon dioxide and methanol, and there is a lack of specific consideration regarding temperature control processes or energy utilization methods for unloading low-temperature methanol.

[0008] In addition, conventional technology considered using seawater or a separate heat medium to control the temperature of methanol during unloading; however, using seawater could cause a localized rise in seawater temperature around the port, which could lead to environmental problems such as an imbalance in temperature with the surrounding waters. Prior art literature

[0009] Korean Patent Publication No. 10-2011-0048266 The problem to be solved

[0010] To solve such problems, the present invention aims to provide a waste heat recovery, storage, and heat supply system for unloading low-temperature methanol from a heterogeneous cargo carrier that alternately transports carbon dioxide and methanol, by recovering waste heat generated from the carrier and storing it in a Thermal Energy Storage System (TESS), and using the stored thermal energy to raise the temperature of the methanol stored in a low-temperature state to an appropriate temperature upon unloading. means of solving the problem

[0011] A waste heat recovery storage and heat supply system (100) for low-temperature methanol unloading of a heterogeneous cargo carrier according to the features of the present invention for achieving the above purpose,

[0012] A waste heat generating unit (110) that provides a waste heat source generated during ship operation;

[0013] A waste heat recovery and transfer unit (120) that recovers thermal energy from a waste heat source provided from the waste heat generation unit (110) and converts the recovered thermal energy into a heating medium and transfers it;

[0014] A thermal energy storage system (130) that stores thermal energy of a heating medium supplied from the waste heat recovery and transfer unit (120) and selectively releases the stored thermal energy;

[0015] A methanol supply unit (140) that stores methanol in a low-temperature state and supplies the stored low-temperature methanol;

[0016] A methanol heating unit (150) that performs heat exchange between a heating medium supplied from the above-mentioned thermal energy storage system (130) and low-temperature methanol supplied from the above-mentioned methanol supply unit (140) to raise the low-temperature methanol to a temperature at which it can be unloaded;

[0017] A loading and unloading supply unit (160) that transfers the methanol heated in the above methanol heating unit (150) to the methanol storage unit (30) of the port; and

[0018] It includes an integrated control unit (170) that controls the operating status of the above waste heat recovery and transfer unit (120), the above thermal energy storage system (130), the above methanol supply unit (140), the above methanol heating unit (150), and the above unloading supply unit (160).

[0019] The integrated control unit (170) can control the heat release amount of the heat energy storage system (130), the heat supply amount of the heating medium, and the unloading operation conditions by comprehensively considering the recoverable waste heat amount, the heat storage amount stored in the heat energy storage system (130), the temperature increase requirement required by the methanol temperature increase unit (150), and the unloading progress rate of the unloading supply unit (160). Effects of the invention

[0020] With the aforementioned configuration, the present invention has the effect of solving the energy consumption problem that occurs during the unloading of low-temperature methanol from a heterogeneous cargo carrier, while simultaneously maximizing the efficiency of waste heat utilization, thereby enabling the implementation of an eco-friendly and economical methanol unloading system.

[0021] The present invention can improve waste heat recovery efficiency by selectively using the most efficient waste heat source among a plurality of waste heat sources according to operating conditions or by utilizing a plurality of waste heat sources simultaneously.

[0022] The present invention can substantially support the economic feasibility of a heterogeneous cargo transport concept to prevent empty vessel voyages by transporting methanol at a low temperature similar to carbon dioxide while efficiently managing the thermal load generated during the unloading process.

[0023] Since the present invention can stably maintain the temperature of methanol within the target temperature range, temperature deviations that may occur during the unloading process can be minimized, and safe and stable methanol unloading can be performed.

[0024] The present invention has the effect of significantly reducing operating costs by actively recovering and utilizing waste heat sources of ships, such as engine coolant and exhaust gas, which would otherwise be wasted into the atmosphere, thereby enabling the heating of cargo without fuel consumption. Brief explanation of the drawing

[0025] FIG. 1 is an overall system block diagram of a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the concept of heating low-temperature methanol using a thermal energy storage system (TESS) according to an embodiment of the present invention and then unloading it. FIG. 3 is a diagram showing the configuration of a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier according to an embodiment of the present invention. FIG. 4 is a diagram showing the configuration of a waste heat recovery and transfer unit according to an embodiment of the present invention. FIG. 5 is a diagram showing the configuration of a thermal energy storage system according to an embodiment of the present invention. FIG. 6 is a diagram showing the configuration of a methanol supply unit according to an embodiment of the present invention. FIG. 7 is a diagram showing the configuration of a methanol heating unit according to an embodiment of the present invention. FIG. 8 is a diagram showing the configuration of a loading and unloading supply unit according to an embodiment of the present invention. FIG. 9 is a diagram showing the configuration of an integrated control unit according to an embodiment of the present invention. Specific details for implementing the invention

[0026] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference number, and redundant descriptions thereof will be omitted. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted.

[0027] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0028] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0029] In this application, each step described may be performed regardless of the order listed, except where it must be performed in the order listed by a particular causal relationship.

[0030] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] Hereinafter, the waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier according to the present invention will be described with reference to the attached drawings.

[0032] FIG. 1 is an overall system block diagram of a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier according to an embodiment of the present invention.

[0033] A heterogeneous cargo carrier (10) means a vessel capable of transporting cargo of different characteristics, such as liquefied carbon dioxide (LCO2) and methanol (MeOH), by storing them in a cross-container, unlike conventional vessels that transport only a single type of cargo.

[0034] The temperature of the heterogeneous cargo carrier (10) is about minus 27 LCO2 at a low temperature level and about minus 20 It may further include a heterogeneous cargo tank (20) in which methanol in a low-temperature state at a certain level is stored alternately.

[0035] The present invention may be configured to recover waste heat generated during ship operation and store it in a thermal energy storage system, and then use the stored thermal energy to raise the temperature of low-temperature methanol and unload it to a methanol storage facility (30) in a port.

[0036] FIG. 2 is a diagram illustrating the concept of heating low-temperature methanol using a thermal energy storage system (TESS) according to an embodiment of the present invention and then unloading it.

[0037] As shown in FIG. 2, low-temperature methanol at -20°C to -25°C stored in a methanol storage tank (141) can be heated to a transferable temperature of 20°C to 25°C by performing heat exchange with a heating medium supplied from a thermal energy storage system (130) and a methanol heating unit (150).

[0038] The heated methanol can be supplied to the methanol storage (30) at the port, and thus the waste heat recovered during the operation of the ship can be efficiently utilized in the methanol unloading process.

[0039] FIG. 3 is a diagram showing the configuration of a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier according to an embodiment of the present invention.

[0040] A waste heat recovery storage and heat supply system (100) for low-temperature methanol unloading of a heterogeneous cargo carrier according to an embodiment of the present invention may include a waste heat generation unit (110), a waste heat recovery and transfer unit (120), a thermal energy storage system (130), a methanol supply unit (140), a methanol heating unit (150), an unloading supply unit (160), and an integrated control unit (170), and these components may be included in a ship system. In particular, the integrated control unit (170) may be installed in the ship's central control room.

[0041] The waste heat generating unit (110) is a device that provides thermal energy generated during ship operation, and at least one of engine coolant, turbocharger exhaust gas, economizer exhaust gas, or boiler exhaust gas may be included as an input value.

[0042] The waste heat generation unit (110) can detect waste heat sources generated during the operation of the ship's main engine (diesel engine) or auxiliary engine, and generate waste heat generation information including the temperature, flow rate, and location of each waste heat source.

[0043] For example, the waste heat generating unit (110) can provide waste heat from engine coolant in the range of 70°C to 90°C, waste heat from exhaust gas after a turbocharger in the range of 200°C to 250°C, or waste heat from exhaust gas after an economizer in the range of 120°C to 180°C as a waste heat source.

[0044] The output value of the waste heat generation unit (110) is waste heat generation information and waste heat source, and the output value is provided as an input value to the waste heat recovery and transfer unit (120).

[0045] Engine coolant refers to a cooling medium that circulates inside an engine to remove heat generated during the operation of a ship's diesel engine or auxiliary machinery.

[0046] Diesel engines generate very high heat during the combustion of fuel, and if this heat is not properly removed, parts such as cylinders, pistons, and cylinder heads may overheat, leading to engine damage or reduced efficiency.

[0047] Accordingly, a coolant circulation system is installed inside the engine, and the coolant absorbs heat from the engine, releases it through a cooler, and then circulates back to the engine.

[0048] Engine coolant can be discharged with thermal energy at a level of about 70°C to 90°C after absorbing heat from the engine's cylinder block, cylinder head, or jacket.

[0049] The waste heat recovery and transfer unit (120) of the present invention may include a heat recovery unit that exchanges heat with engine coolant, and may recover thermal energy contained in the engine coolant and transfer it to a heat medium. The transferred thermal energy is stored in a thermal energy storage system (130) (Thermal Energy Storage, TESS), and the stored thermal energy can be utilized in the heating process of low-temperature methanol.

[0050] The exhaust gas from the rear of the turbocharger refers to exhaust gas generated from a ship's diesel engine or auxiliary engine that is discharged after passing through the turbine section of the turbocharger. The exhaust gas from the rear of the turbocharger can retain thermal energy at a level of approximately 200°C to 250°C even after some energy has been used to drive the turbocharger, and the waste heat recovery and transfer unit (120) of the present invention can recover thermal energy from the exhaust gas from the rear of the turbocharger and store it in a thermal energy storage system (130).

[0051] The exhaust gas after the economizer may refer to exhaust gas generated from the ship's main engine (diesel engine) or auxiliary engine that passes through a turbocharger and then undergoes a heat recovery process in an economizer before being discharged. Even after some thermal energy is recovered in the economizer, the exhaust gas after the economizer may retain residual thermal energy at a level of approximately 120°C to 180°C and may exhibit relatively stable temperature characteristics.

[0052] Accordingly, the waste heat recovery and transfer unit (120) of the present invention recovers thermal energy from the exhaust gas downstream of the economizer and stores it in a thermal energy storage system (130), and can utilize the stored thermal energy in the heating process of low-temperature methanol.

[0053] Boiler exhaust gas refers to the high-temperature exhaust gas emitted after fuel is burned in a boiler installed on a ship.

[0054] Engine coolant can serve as a stable heat source as it is continuously generated while the engine is running, exhaust gas from the turbocharger is high temperature but subject to large load fluctuations, exhaust gas from the economizer is affected by operating conditions, and boiler exhaust gas can be generated only during boiler operation.

[0055] The waste heat recovery and transfer unit (120) may be a device that extracts recoverable thermal energy using waste heat source and waste heat generation information input from the waste heat generation unit (110).

[0056] The waste heat recovery and transfer unit (120) may be provided with input values ​​including a waste heat source output from the waste heat generation unit (110), temperature information of the waste heat source, flow rate information of the waste heat source, and information on the amount of waste heat that can be recovered.

[0057] The waste heat recovery and transfer unit (120) transfers heat from a waste heat source to a heat medium using a waste heat heat exchanger, a heat medium circulation pump, a circulation pipe, and a flow control valve. At this time, the waste heat recovery and transfer unit (120) can selectively recover at least one of engine coolant waste heat, turbocharger exhaust gas waste heat, and economizer exhaust gas waste heat depending on the temperature level of the waste heat source.

[0058] The thermal energy storage system (130) stores thermal energy of a heating medium supplied from a waste heat recovery and transfer unit (120) and can selectively release the stored thermal energy.

[0059] The methanol supply unit (140) can store methanol in a low-temperature state and supply the stored low-temperature methanol.

[0060] The methanol heating unit (150) can raise the temperature of the low-temperature methanol to a temperature at which it can be unloaded by performing heat exchange between the heating medium supplied from the thermal energy storage system (130) and the low-temperature methanol supplied from the methanol supply unit (140).

[0061] The unloading supply unit (160) can transfer the methanol heated in the methanol heating unit (150) to the methanol storage unit (30) in the port.

[0062] The integrated control unit (170) can control the operating status of the waste heat recovery and transfer unit (120), the thermal energy storage system (130), the methanol supply unit (140), the methanol heating unit (150), and the unloading supply unit (160).

[0063] The integrated control unit (170) can control the heat release amount of the heat energy storage system (130), the heat storage amount stored in the heat energy storage system (130), the heat increase requirement required by the methanol heating unit (150), and the unloading progress rate of the unloading supply unit (160) by comprehensively considering the recoverable waste heat amount, the heat storage amount stored in the heat energy storage system (130), the heat increase requirement required by the methanol heating unit (150), and the unloading progress rate of the unloading supply unit (160).

[0064] FIG. 4 is a diagram showing the configuration of a waste heat recovery and transfer unit according to an embodiment of the present invention.

[0065] A waste heat recovery and transfer unit (120) according to an embodiment of the present invention may include a waste heat heat exchange unit (121), a waste heat selection control unit (122), a heat medium transfer unit (123), a first temperature measuring unit (124), a first flow rate measuring unit (125), a recovery control unit (126), and a heat medium transfer piping unit (127).

[0066] The waste heat heat exchanger (121) can recover waste heat generated from the waste heat generation unit (110) and transfer it to a heat medium.

[0067] The waste heat heat exchanger (121) can receive waste heat source information including at least one of engine coolant, turbocharger exhaust gas, economizer exhaust gas, and boiler exhaust gas, as well as temperature information and flow rate information of the waste heat source, as input values ​​from the waste heat generation unit (110).

[0068] The waste heat heat exchanger (121) can perform heat exchange between the waste heat source information and the heat medium to transfer the heat energy contained in the waste heat to the heat medium.

[0069] The waste heat heat exchanger (121) can output information on the heated heat medium, the amount of recovered heat, and the completion of the heat exchange to the waste heat selection control unit (122).

[0070] The waste heat selection control unit (122) can receive information on the heat medium supplied from the waste heat heat exchange unit (121), the amount of recovered heat, and the completion of the heat exchange.

[0071] The waste heat selection control unit (122) can select the most efficient waste heat source among the information of multiple waste heat sources or use a combination of multiple waste heat sources.

[0072] The waste heat selection control unit (122) can generate selected waste heat information, a heat medium supply command, and a valve control command as output values.

[0073] The heat medium transfer unit (123) can receive selected waste heat information, heat medium supply command, and valve control command supplied from the waste heat selection control unit (122).

[0074] The heat medium transfer unit (123) can circulate the heat medium using a circulation pump and transfer the heat medium heated in the waste heat heat exchange unit (121) toward the thermal energy storage system (130).

[0075] The heat medium transfer unit (123) can generate heat medium flow rate information, heat medium pressure information, and heat medium circulation status information as output values.

[0076] The first temperature measuring unit (124) can receive heat medium flow rate information, heat medium pressure information, and heat medium circulation status information supplied from the heat medium transfer unit (123) as input values.

[0077] The first temperature measuring unit (124) can measure temperature information corresponding to the heat medium inlet temperature, heat medium outlet temperature, waste heat source temperature, and the amount of recovered heat.

[0078] The first flow rate measuring unit (125) can receive heat medium flow rate information, heat medium pressure information, and heat medium circulation status information supplied from the heat medium transport unit (123) as input values.

[0079] The first flow rate measuring unit (125) can calculate the instantaneous flow rate, cumulative flow rate, and heat transfer amount per unit time of the heat medium.

[0080] The first flow rate measuring unit (125) can generate heat medium flow rate information, recovered heat amount information, and heat transfer efficiency information as output values.

[0081] The recovery control unit (126) receives heat medium flow rate information, recovery heat amount information, and heat transfer efficiency information supplied from the first flow rate measuring unit (125) as input values, and receives temperature information corresponding to the heat medium inlet temperature, heat medium outlet temperature, waste heat source temperature, and recovery heat amount input from the first temperature measuring unit (124) as input values.

[0082] The recovery control unit (126) can control the amount of waste heat recovered and the amount of heat medium supplied by comprehensively analyzing the temperature information of the waste heat source, the amount of heat recovered, the flow rate information of the heat medium, the operating status information of the waste heat source, and the heat storage capacity of the thermal energy storage system (130).

[0083] The recovery control unit (126) can generate waste heat recovery control commands, heat medium supply control commands, and heat transfer control commands as output values.

[0084] The heat medium transfer piping section (127) can receive waste heat recovery control commands, heat medium supply control commands, and heat transfer control commands supplied from the recovery control section (126) as input values.

[0085] The heat transfer pipe section (127) can generate heating heat transfer medium, recovered heat amount information, and heat transfer medium temperature information as output values.

[0086] FIG. 5 is a diagram showing the configuration of a thermal energy storage system according to an embodiment of the present invention.

[0087] A thermal energy storage system (TESS) (130) according to an embodiment of the present invention is a device for storing waste heat generated during ship operation and supplying thermal energy required for unloading low-temperature methanol, and may include a thermal energy storage unit (131), a thermal energy management unit (132), a heat release unit (133), and a heat medium circulation unit (134).

[0088] The thermal energy storage unit (131) is a core component constituting the TESS (130) of the present invention and can perform the function of storing waste heat supplied from the waste heat recovery and transfer unit (120). Specifically, the thermal energy storage unit (131) can receive thermal energy recovered from at least one of engine coolant, turbocharger exhaust gas, economizer exhaust gas, and boiler exhaust gas as an input value.

[0089] The thermal energy storage unit (131) can receive the heat medium supplied from the waste heat recovery and transfer unit (120), the recovered heat amount information, and the heat medium temperature information as input values.

[0090] The thermal energy storage unit (131) can store thermal energy contained in the input heating medium in a thermal storage medium. At this time, the thermal storage medium may be composed of a phase change material (PCM), molten salt, thermal oil, a solid thermal storage block, or a combination thereof.

[0091] The thermal energy storage unit (131) can generate storage temperature information, storage heat amount information, and heat storage state information as output values, and the output values ​​can be provided as input values ​​to the thermal energy management unit (132).

[0092] The thermal energy management unit (132) can receive storage temperature information, storage heat amount information, and heat storage status information supplied from the thermal energy storage unit (131) as input values.

[0093] The thermal energy management unit (132) can analyze the current state of the stored thermal energy and calculate the amount of heat available, the expected amount of heat loss, and the amount of heat that can be used to raise the temperature of methanol. In addition, the thermal energy management unit (132) can determine whether heat can be released by considering the methanol unloading schedule and the target temperature.

[0094] The thermal energy management unit (132) can generate available storage heat information, target release heat amount information, and heat release request information as output values, and said output values ​​can be provided as input values ​​to the heat release unit (133).

[0095] The heat release unit (133) can receive available storage heat information, target heat release amount information, and heat release request information supplied from the heat energy management unit (132) as input values.

[0096] The heat release unit (133) can transfer the heat energy stored in the heat energy storage unit (131) to a heat medium and release the stored heat to the outside. In addition, the heat release unit (133) can adjust the amount of heat medium supplied and the amount of heat released according to the target amount of heat released.

[0097] The heat release unit (133) can generate heating medium, supply heat amount information, and supply temperature information as output values, and the output values ​​can be provided as input values ​​to the heat medium circulation unit (134).

[0098] The heat medium circulation unit (134) can receive the heating medium supplied from the heat release unit (133), the supply heat amount information, and the supply temperature information as input values.

[0099] The heat medium circulation unit (134) can circulate the heat medium using a circulation pump and circulation pipes and transfer the heated heat medium to the methanol heating unit (150). In addition, stable heat transfer can be achieved by adjusting the flow rate and pressure of the heat medium.

[0100] The heat medium circulation unit (134) can generate heat medium flow rate information, heat medium pressure information, and heat medium supply status information as output values, and the output values ​​can be provided as input values ​​to the thermal energy storage system (130).

[0101] The integrated control unit (170) is configured to control the overall heat supply operation of the thermal energy storage system (130) and can control the stable supply of stored thermal energy to the methanol heating unit (150). Specifically, the integrated control unit (170) receives storage temperature information, stored heat amount information, and heat storage status information supplied from the thermal energy storage unit (131), and receives available stored heat information, target release heat amount information, and heat release request information supplied from the thermal energy management unit (132).

[0102] The integrated control unit (170) can receive methanol inlet temperature information, methanol outlet temperature information, methanol supply flow rate information, and target temperature increase information generated from the temperature sensor and flow rate sensor provided in the methanol temperature increase unit (150).

[0103] The integrated control unit (170) can calculate the amount of heat required by the methanol heating unit (150) by comprehensively analyzing the received information. Specifically, the integrated control unit (170) can calculate the difference between the current temperature of the low-temperature methanol supplied from the methanol supply unit (140) and the target heating temperature, and calculate the target amount of heat required for heating using the methanol supply flow rate information.

[0104] In addition, the integrated control unit (170) can determine whether to supply the required amount of heat by analyzing the amount of heat and the storage temperature currently stored in the thermal energy storage unit (131).

[0105] For example, if the temperature of the methanol supplied from the methanol supply unit (140) is about -20°C to -25°C and the target temperature for unloading is about 20°C to 25°C, the integrated control unit (170) can calculate the target amount of heat required to raise the temperature of the methanol.

[0106] The integrated control unit (170) can determine whether the heat quantity and storage temperature currently stored inside the TESS can satisfy the target heat quantity.

[0107] When the target heat amount is calculated, the integrated control unit (170) can control the heat medium circulation unit (134) to supply the stored thermal energy to the methanol heating unit (150). Specifically, the integrated control unit (170) can control the rotational speed of the circulation pump included in the heat medium circulation unit (134) to regulate the circulation flow rate of the heat medium. Accordingly, the speed at which the heating medium containing the stored thermal energy is supplied to the methanol heating unit (150) can be controlled.

[0108] Here, the circulation pump is configured to be included in the heat medium circulation section (134) to circulate the heat medium, and can apply pressure to the heat medium by the driving force of the electric motor, thereby allowing the heat medium to circulate along the inside of the pipe.

[0109] The integrated control unit (170) can control the supply amount of heat medium by adjusting the opening degree of the control valve included in the heat medium circulation unit (134). For example, if the outlet temperature of methanol is lower than the target temperature, the integrated control unit (170) can control the supply of more heating heat medium to the methanol heating unit (150) by increasing the rotational speed of the circulation pump or expanding the opening degree of the control valve. Conversely, if the outlet temperature of methanol is higher than the target temperature, the integrated control unit (170) can reduce the supply amount of heat medium by decreasing the rotational speed of the circulation pump or reducing the opening degree of the control valve.

[0110] Here, the control valve is included in the heat medium circulation unit (134) and can control the flow rate of the fluid by adjusting the valve opening degree.

[0111] The heat medium circulation unit (134) can circulate the heat medium according to the circulation control command and valve control command supplied from the integrated control unit (170), and can transfer the heating heat medium supplied from the heat release unit (133) to the methanol heating unit (150). Accordingly, the methanol heating unit (150) can perform heat exchange between the low-temperature methanol supplied from the methanol supply unit (140) and the heating heat medium supplied from the TESS (130) to raise the temperature of the methanol to an appropriate unloading temperature.

[0112] Specifically, the methanol supply unit (140) can supply low-temperature methanol of about -20°C to -25°C to the methanol heating unit (150), and the heat medium circulation unit (134) can supply a heating medium in the range of about 80°C to 150°C to the methanol heating unit (150).

[0113] The methanol heating unit (150) can perform heat exchange between low-temperature methanol and a heating medium to raise the temperature of the methanol to a temperature of approximately 20°C to 25°C.

[0114] The integrated control unit (170) can continuously adjust the supply flow rate, supply pressure, and supply temperature of the heat medium while monitoring the operating status of the methanol heating unit (150) in real time.

[0115] The integrated control unit (170) can prevent the stored thermal energy from being excessively released or supplied insufficiently, and can improve unloading efficiency while maintaining the temperature of methanol stably.

[0116] Accordingly, the integrated control unit (170) can control the low-temperature methanol to be stably heated to the target unloading temperature by selectively supplying the thermal energy stored in the thermal energy storage unit (131) to the methanol heating unit (150) through the heat medium circulation unit (134).

[0117] The methanol heating unit (150) can transmit the measured methanol inlet temperature information, methanol outlet temperature information, and methanol supply flow rate information back to the integrated control unit (170).

[0118] The integrated control unit (170) can perform closed-loop control by analyzing the above information in real time and continuously adjusting the operating state of the heat medium circulation unit (134). Accordingly, the integrated control unit (170) can prevent the stored thermal energy from being excessively released or supplied insufficiently, and can stably maintain the outlet temperature of methanol within the target temperature range.

[0119] Accordingly, the integrated control unit (170) controls the heat medium circulation unit (134) based on the operating status information received from the methanol heating unit (150), and the heat medium circulation unit (134) can be controlled so that the low-temperature methanol is stably heated to a temperature at which it can be unloaded by supplying thermal energy stored in the TESS to the methanol heating unit (150).

[0120] FIG. 6 is a diagram showing the configuration of a methanol supply unit according to an embodiment of the present invention.

[0121] A methanol supply unit (140) according to an embodiment of the present invention is configured to store methanol in a low-temperature state and supply the stored methanol to a methanol heating unit (150), and may include a methanol storage tank (141), a methanol supply pump (142), a methanol supply pipe (143), a methanol supply control valve (144), a storage tank temperature measuring unit (145), a storage tank flow rate measuring unit (146), and a supply control unit (147).

[0122] As illustrated in FIG. 6, the heterogeneous cargo tank (20) may be a tank in which LCO2 is stored, or a methanol storage tank (141) in which low-temperature methanol is stored.

[0123] The methanol storage tank (141) is a device for storing methanol loaded from a production site or supply facility, and includes an insulating structure to maintain the methanol at a low temperature in the range of approximately -20°C to -25°C. In addition, the methanol storage tank (141) can minimize changes in the quality of the methanol while continuously maintaining the internal temperature, storage volume, and pressure.

[0124] The methanol storage tank (141) can generate methanol storage information, storage temperature information, and storage amount information as output values, and the output values ​​can be provided as input values ​​to the supply control unit (147).

[0125] The methanol supply pump (142) can transfer low-temperature methanol stored in the methanol storage tank (141) toward the methanol heating unit (150) and apply transfer pressure to the methanol to move it along the methanol supply pipe (143) to supply methanol to the methanol heating unit (150) at a preset flow rate.

[0126] The methanol supply pipe (143) connects the methanol storage tank (141) and the methanol heating unit (150), and can receive low-temperature methanol delivered from the methanol supply pump (142).

[0127] The methanol supply pipe (143) can stably transport low-temperature methanol to the methanol heating section (150) and includes an insulating structure to minimize temperature changes that may occur during the transport process.

[0128] The methanol supply pipe (143) can generate methanol flow information and supply status information as output values, and the output values ​​can be provided as input values ​​to the methanol heating unit (150).

[0129] The methanol supply control valve (144) is configured to control the amount of methanol supplied, and receives a valve control command input from the supply control unit (147), and controls the flow rate of methanol supplied to the methanol heating unit (150) by adjusting the degree of opening according to the received valve control command.

[0130] The storage tank temperature measuring unit (145) can be installed inside the methanol storage tank (141) or in the methanol supply pipe (143) and can measure the storage temperature and supply temperature of methanol.

[0131] The storage tank flow rate measuring unit (146) is a device for measuring the supply flow rate of methanol and can measure the instantaneous flow rate and cumulative flow rate of methanol passing through the methanol supply pipe (143).

[0132] The supply control unit (147) can receive storage temperature information and storage amount information input from the methanol storage tank (141), supply pressure information and supply flow rate information input from the methanol supply pump (142), methanol temperature information input from the storage tank temperature measuring unit (145), and methanol flow rate information input from the storage tank flow rate measuring unit (146).

[0133] The supply control unit (147) can comprehensively analyze the received information to control the operating state of the methanol supply pump (142) and the opening degree of the methanol supply control valve (144), and can adjust the supply amount according to the required flow rate of the methanol heating unit (150).

[0134] The supply control unit (147) can generate a pump control command, a valve control command, and a methanol supply control command as output values, and the output values ​​can be provided as input values ​​for the methanol supply pump (142) and the supply control valve.

[0135] In this way, the methanol supply unit (140) can stably store low-temperature methanol stored in the methanol storage tank (141) and supply the required amount of methanol according to the operating conditions of the methanol heating unit (150), thereby improving the stability of the methanol unloading process.

[0136] FIG. 7 is a diagram showing the configuration of a methanol heating unit according to an embodiment of the present invention.

[0137] The methanol heating unit (150) according to an embodiment of the present invention can perform the function of heating the methanol to a temperature at which it can be unloaded by performing heat exchange between the low-temperature methanol supplied from the methanol supply unit (140) and the heating medium supplied from the TESS.

[0138] The methanol heating unit (150) according to an embodiment of the present invention may include a methanol heat exchange unit (151), a methanol inlet unit (153), a second temperature measuring unit (154), and a second flow rate measuring unit (155).

[0139] The methanol heat exchanger (151) can be implemented as a shell-and-tube heat exchanger, a plate heat exchanger, a double-tube heat exchanger, or a combination thereof.

[0140] The methanol heat exchanger (151) can receive low-temperature methanol supplied from the methanol supply unit (140) and heating medium supplied from the heat medium circulation unit (134) of the TESS.

[0141] The methanol heat exchanger (151) can perform heat exchange between low-temperature methanol and a heating medium to raise the low-temperature methanol to room temperature.

[0142] The heat medium supply unit (152) can transfer the heating medium supplied from the TESS to the methanol heat exchange unit (151) and recover the heat medium after the heat exchange is completed back to the TESS.

[0143] The heat medium supply unit (152) can generate heat medium supply flow rate information, heat medium supply temperature information, and heat medium supply status information as output values, and the output values ​​can be provided as input values ​​to the integrated control unit (170).

[0144] The methanol inlet section (153) includes a methanol supply pipe (143), a methanol inlet control valve, and a methanol distribution line, and can transfer low-temperature methanol supplied from the methanol supply section (140) to the methanol heat exchange section (151).

[0145] The methanol inlet unit (153) can generate methanol inflow flow rate information, methanol inflow pressure information, and methanol supply status information as output values, and the output values ​​can be provided as input values ​​to the integrated control unit (170).

[0146] The second temperature measuring unit (154) measures the temperature of methanol and the heat medium and may include a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor.

[0147] The first temperature sensor can measure the methanol temperature at the inlet side of the heat exchanger, and the second temperature sensor can measure the methanol temperature at the outlet side of the heat exchanger. In addition, the third temperature sensor can measure the heat medium inlet temperature, and the fourth temperature sensor can measure the heat medium outlet temperature.

[0148] The second temperature measuring unit (154) can generate methanol inlet temperature information, methanol outlet temperature information, heat medium inlet temperature information, and heat medium outlet temperature information as output values, and the output values ​​can be provided as input values ​​to the integrated control unit (170).

[0149] The second flow measurement unit (155) may include a methanol flow meter and a heat medium flow meter, and may measure the flow rates of methanol and the heat medium.

[0150] The second flow rate measuring unit (155) can generate methanol flow rate information, heat medium flow rate information, and heat transfer amount information per unit time.

[0151] The output value of the second flow rate measuring unit (155) can be provided as an input value to the integrated control unit (170).

[0152] The integrated control unit (170) can receive methanol inlet temperature information, methanol outlet temperature information, heat medium inlet temperature information, and heat medium outlet temperature information input from the second temperature measuring unit (154), and methanol flow rate information and heat medium flow rate information input from the flow rate measuring unit.

[0153] The integrated control unit (170) can receive target temperature increase information from an input unit (not shown).

[0154] The integrated control unit (170) can determine the current heat exchange status by analyzing the received information and control the heat exchange amount by controlling the control valve of the heat medium supply unit (152) and the control valve of the methanol inlet unit (153).

[0155] For example, if the methanol outlet temperature is lower than the target temperature, the integrated control unit (170) can control the heat medium supply amount to increase, and conversely, if the methanol outlet temperature is higher than the target temperature, it can control the heat medium supply amount to decrease.

[0156] The integrated control unit (170) can generate heat medium supply control commands, methanol supply control commands, and temperature rise status information as output values.

[0157] In this way, the integrated control unit (170) can raise the temperature of the methanol from about -20°C to -25°C to an unloadable temperature of about 20°C to 25°C by performing heat exchange between the low-temperature methanol supplied from the methanol supply unit (140) and the heating medium supplied from the TESS, thereby improving the methanol unloading efficiency by utilizing waste heat generated during ship operation without consuming separate boiler fuel.

[0158] FIG. 8 is a diagram showing the configuration of a loading and unloading supply unit according to an embodiment of the present invention.

[0159] The unloading supply unit (160) according to an embodiment of the present invention performs the function of transferring heated methanol supplied from the methanol heating unit (150) to the methanol storage unit (30) of the port, and may include an unloading pump (161), an unloading piping unit (162), an unloading manifold (163), and an unloading control unit (164).

[0160] The unloading pump (161) can apply transfer pressure to the heated methanol supplied from the methanol heating section (150) and move it along the unloading piping section (162) toward the methanol storage (30).

[0161] The unloading pump (161) can generate unloading flow rate information, unloading pressure information, and pump operation status information as output values, and the output values ​​can be provided as input values ​​to the unloading control unit (164).

[0162] The unloading piping section (162) may include an unloading pipe, a connecting flange, a flexible hose, and a land connection line.

[0163] The unloading piping section (162) can transfer heated methanol input from the unloading pump (161) to the methanol storage (30).

[0164] The unloading manifold (163) receives heated methanol input from the unloading piping section (162) and can selectively connect or distribute multiple unloading lines and control the fluid flow to the unloading destination.

[0165] The unloading control valve (not shown) receives a valve control command input from the unloading control unit (164) as an input value, and can control the unloading flow rate of methanol by adjusting the degree of opening according to the received valve control command.

[0166] The unloading control unit (164) can receive unloading flow rate information input from the unloading pump (161) and unloading path information input from the unloading manifold (163).

[0167] The unloading control unit (164) can receive methanol outlet temperature information input from the methanol heating unit (150) and unloading operation commands input from the integrated control unit (170).

[0168] The unloading control unit (164) can analyze the received information to control the operating state of the unloading pump (161), the opening degree of the unloading control valve, and the unloading flow rate.

[0169] For example, if the temperature of the methanol drops below the set unloadable temperature range, the unloading control unit (164) may reduce the unloading speed or temporarily stop the unloading.

[0170] In this way, the unloading supply unit (160) can stably supply the methanol heated in the methanol heating unit (150) to the methanol storage unit (30) in the port.

[0171] FIG. 9 is a diagram showing the configuration of an integrated control unit according to an embodiment of the present invention.

[0172] The integrated control unit (170) can manage and control the operating status of the waste heat generation unit (110), waste heat recovery and transfer unit (120), thermal energy storage system (130), methanol supply unit (140), methanol heating unit (150), and unloading supply unit (160) in an integrated manner.

[0173] An integrated control unit (170) according to an embodiment of the present invention may include a waste heat information collection module (171), a heat storage state analysis module (172), a temperature increase control module (173), an unloading management module (174), an optimal operation judgment module (175), and an integrated control module (176).

[0174] The waste heat information collection module (171) can collect operation information from the waste heat generation unit (110) and the waste heat recovery and transfer unit (120).

[0175] The waste heat information collection module (171) can receive temperature information, flow rate information, waste heat generation amount information, and operating status information of waste heat sources generated from the main engine, auxiliary engine, boiler, and economizer as input values.

[0176] The waste heat information collection module (171) can analyze the collected waste heat information to generate information on the amount of waste heat currently recoverable.

[0177] The output value of the waste heat information collection module (171) is information on recoverable waste heat amount, information on the waste heat generation status, and information on the operation of the waste heat source, and the output value can be provided as an input value to the heat storage status analysis module (172) and the optimal operation judgment module (175).

[0178] The heat storage state analysis module (172) is configured to analyze the heat storage state of the TESS and can receive storage temperature information, storage heat amount information, heat release state information, and remaining heat storage capacity information input from the TESS as input values.

[0179] The heat storage state analysis module (172) can calculate the current heat that can be stored, the heat that can be used, and the heat that can be expected to be released.

[0180] The output value of the heat storage state analysis module (172) is information on available heat storage, information on the heat storage state, and information on the expected heat amount that can be released, and the output value can be provided as an input value to the optimal operation judgment module (175).

[0181] The temperature control module (173) is configured to analyze the methanol temperature state and can receive methanol inlet temperature information, methanol outlet temperature information, methanol supply flow rate information, and heat medium supply state information input from the methanol temperature unit (150) as input values.

[0182] The temperature control module (173) can determine the current temperature increase efficiency, whether the target temperature has been reached, and whether additional heat supply is needed.

[0183] The output value of the temperature control module (173) is the target temperature information, the required heat information, and the temperature status information, and the output value can be provided as an input value to the optimal operation judgment module (175) and the methanol temperature increase unit (150).

[0184] The unloading management module (174) can receive unloading flow rate information, unloading pressure information, accumulated unloading amount information, and unloading progress status information input from the unloading supply unit (160) as input values.

[0185] The unloading management module (174) can analyze the current unloading progress rate, the estimated unloading completion time, and whether the target unloading volume has been achieved.

[0186] The output values ​​of the unloading management module (174) are unloading progress status information, expected unloading completion information, and unloading control request information, and the output values ​​can be provided as input values ​​to the optimal operation judgment module (175).

[0187] The optimal driving judgment module (175) can perform the function of comprehensively analyzing the driving status of the entire system.

[0188] The optimal operation judgment module (175) can receive as input values ​​information on recoverable waste heat amount input from the waste heat information collection module (171), information on usable stored heat input from the heat storage state analysis module (172), information on required heat amount input from the temperature increase control module (173), and information on the unloading progress input from the unloading management module (174).

[0189] The optimal operation judgment module (175) can determine the optimal heat supply strategy by comprehensively analyzing the waste heat recovery amount, TESS heat storage amount, methanol temperature increase requirement, and unloading progress status.

[0190] For example, it can be determined to increase the heat release amount of the TESS during the initial stage of unloading and to decrease the heat release amount during the final stage of unloading. Additionally, the optimal operation judgment module (175) can determine to adjust the unloading speed or change the temperature increase conditions if the stored heat amount is insufficient.

[0191] The output value of the optimal operation judgment module (175) is a heat supply optimization command, a temperature increase optimization command, an unloading optimization command, and operation strategy information, and the output value can be provided as an input value to the integrated control module (176).

[0192] The integrated control module (176) can receive heat supply optimization commands, temperature increase optimization commands, and unloading optimization commands input from the optimal operation judgment module (175) as input values.

[0193] The integrated control module (176) can use the above information to transmit control commands to the recovery control unit (126) of the waste heat recovery and transfer unit (120), the thermal energy storage system (130), the supply control unit (147) of the methanol supply unit (140), the methanol heating unit (150), and the unloading control unit (164) of the unloading supply unit (160).

[0194] Accordingly, the integrated control module (176) can integrally control the waste heat recovery amount, heat storage amount, heat release amount, methanol supply amount, methanol heating amount, and unloading flow rate.

[0195] The integrated control module (176) can finally generate system operation status information, energy usage information, waste heat utilization efficiency information, and unloading completion information as output values, and the information can be provided to the operator terminal or the ship control room.

[0196] Accordingly, the integrated control unit (170) can improve the efficiency of waste heat utilization and ensure the stability of the methanol unloading process by integrally controlling the entire process from the recovery of waste heat generated during ship operation to storage, heat supply, heating of methanol, and unloading.

[0197] The integrated control unit (170) can optimize the heat release amount, heat medium supply amount, and unloading operation conditions by comprehensively considering the recoverable waste heat amount, the heat storage amount stored in the TESS (130), the heat amount required to achieve the target temperature increase of methanol, and the current unloading progress rate.

[0198] The technical features disclosed in each embodiment of the present invention may be combined with other embodiments and applied as long as they are not incompatible with one another, but are not limited thereto.

[0199] The present invention is not limited to the embodiments described above and the attached drawings, and various modifications and variations may be possible from the perspective of those skilled in the art to which the present invention belongs. Accordingly, the scope of the present invention should be defined not only by the claims of this specification but also by equivalents thereof. Explanation of the symbols

[0200] 100: Waste heat recovery, storage, and heat supply system 110: Waste heat generation unit 120: Waste heat recovery and transfer unit 121: Waste heat heat exchange unit 122: Waste heat selection control unit 123: Heat medium transfer unit 124: First temperature measuring unit 125: First flow rate measuring unit 126: Recovery control unit 127: Heat medium transfer piping unit 130: Thermal energy storage system 131: Thermal energy storage unit 132: Thermal Energy Management Department 133: Heat Release Department 134: Heat transfer fluid circulation section 140: Methanol supply unit 141: Methanol storage tank 142: Methanol supply pump 143: Methanol supply piping 144: Methanol supply control valve 145: Storage tank temperature measuring unit 146: Storage tank flow rate measuring unit 147: Supply control unit 150: Methanol heating section 151: Methanol heat exchange section 152: Heat transfer medium supply section 153: Methanol inlet section 154: Second temperature measuring unit 155: Second flow rate measuring unit 160: Loading and Unloading Supply Unit 161: Loading / Unloading Pump 162: Loading / Unloading Piping Section 163: Loading and unloading manifold 164: Loading and unloading control unit 170: Integrated Control Unit 171: Waste Heat Information Collection Module 172: Heat storage status analysis module 173: Temperature rise control module 174: Cargo Handling Management Module 175: Optimal Operation Decision Module 176: Integrated Control Module

Claims

Claim 1 In a waste heat recovery storage and heat supply system for unloading low-temperature methanol on a heterogeneous cargo carrier, the system comprises: a waste heat generation unit (110) that provides a waste heat source generated during the operation of the vessel; a waste heat recovery and transfer unit (120) that recovers thermal energy from the waste heat source provided by the waste heat generation unit (110) and converts the recovered thermal energy into a heating medium and transfers it; a thermal energy storage system (130) that stores the thermal energy of the heating medium supplied by the waste heat recovery and transfer unit (120) and selectively releases the stored thermal energy; a methanol supply unit (140) that stores methanol in a low-temperature state and supplies the stored low-temperature methanol; a methanol heating unit (150) that performs heat exchange between the heating medium supplied by the thermal energy storage system (130) and the low-temperature methanol supplied by the methanol supply unit (140) to raise the temperature of the low-temperature methanol to a temperature at which it can be unloaded; and in the methanol heating unit (150 A waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo vessel, comprising: an unloading supply unit (160) that transfers heated methanol to a methanol storage unit (30) in a port; and an integrated control unit (170) that controls the operating state of the waste heat recovery and transfer unit (120), the heat energy storage system (130), the methanol supply unit (140), the methanol heating unit (150), and the unloading supply unit (160), wherein the integrated control unit (170) controls the heat release amount of the heat energy storage system (130), the heat medium supply amount, and the unloading operation conditions by comprehensively considering the amount of recoverable waste heat, the amount of heat stored in the heat energy storage system (130), the amount of heating required in the methanol heating unit (150), and the unloading progress rate of the unloading supply unit (160). Claim 2 In claim 1, the heterogeneous cargo carrier is configured to alternately transport liquefied carbon dioxide and methanol, and the methanol supply unit (140) is a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier, comprising a methanol storage tank (141) that stores methanol in a low-temperature state in the range of -20°C to -25°C. Claim 3 In claim 1, the waste heat generating unit (110) is a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier, which provides at least one of engine coolant, turbocharger exhaust gas, economizer exhaust gas and boiler exhaust gas as a waste heat source. Claim 4 In claim 1, the waste heat recovery and transfer unit (120) comprises: a waste heat heat exchange unit (121) that generates a heating heat medium by performing heat exchange between the waste heat source and the heat medium; a waste heat selection control unit (122) that selects a waste heat source to be recovered among a plurality of waste heat sources; a heat medium transfer unit (123) that transfers the heating heat medium toward the thermal energy storage system (130); a first temperature measuring unit (124) that measures the temperature of the waste heat source or the heat medium; a first flow rate measuring unit (125) that measures the flow rate of the waste heat source or the heat medium; a recovery control unit (126) that controls the amount of waste heat recovered and the amount of heat medium supplied using information input from the first temperature measuring unit (124) and the first flow rate measuring unit (125); and a heat medium transfer piping unit (127) that transfers the heating heat medium to the thermal energy storage system (130), thereby forming a waste heat recovery storage and heat supply system for unloading low-temperature methanol from a heterogeneous cargo carrier. Claim 5 In claim 1, the thermal energy storage system (130) further comprises: a thermal energy storage unit (131) that stores thermal energy of a heating medium supplied from the waste heat recovery and transfer unit (120); and a thermal energy management unit (132) that calculates usable stored heat information by analyzing the storage temperature, stored heat amount, and heat accumulation state of the thermal energy storage unit (131); and the integrated control unit (170) calculates the required heat amount based on the difference between the current temperature of the low-temperature methanol and the target temperature increase and the methanol supply flow rate, and controls the supply amount of the heat medium supplied to the methanol temperature increase unit (150) by adjusting the rotational speed of the circulation pump or the degree of opening of the control valve provided inside the thermal energy storage system (130). Claim 6 In claim 5, the methanol heating unit (150) includes a methanol heat exchange unit (151) that performs heat exchange between the low-temperature methanol and the heating medium, and a second temperature measuring unit (154) that measures the methanol temperature at the heat exchanger inlet / outlet side and the heat medium inlet / outlet temperature in real time, and the integrated control unit (170) performs closed-loop control by increasing the speed of the circulation pump or expanding the opening degree of the control valve when the methanol outlet temperature measured by the second temperature measuring unit (154) is lower than the target heating temperature, and decreasing the speed of the circulation pump or reducing the opening degree of the control valve when it is higher than the target heating temperature, in a waste heat recovery storage and heat supply system for unloading low-temperature methanol of a heterogeneous cargo carrier. Claim 7 A waste heat recovery storage and heat supply system for unloading low-temperature methanol of a heterogeneous cargo carrier, wherein the methanol supply unit (140) supplies low-temperature methanol at -20°C to -25°C, the thermal energy storage system (130) supplies a heating medium in the range of 80°C to 150°C, and the methanol heating unit (150) raises the temperature of the methanol to an unloadable temperature of 20°C to 25°C using the heating medium. Claim 8 In claim 5, the integrated control unit (170) receives methanol inlet temperature information, methanol outlet temperature information, and methanol supply flow rate information from the methanol heating unit (150), and increases the rotational speed of the circulation pump or the opening degree of the control valve when the methanol outlet temperature is lower than the target heating temperature, and decreases the rotational speed of the circulation pump or the opening degree of the control valve when the methanol outlet temperature is higher than the target heating temperature, in a waste heat recovery storage and heat supply system for low-temperature methanol unloading of a heterogeneous cargo carrier. Claim 9 In claim 1, the methanol supply unit (140) further comprises: a methanol storage tank (141) having an insulating structure to maintain the low-temperature methanol in a low-temperature state in the range of -20°C to -25°C; a methanol supply pump (142) for transferring the low-temperature methanol stored in the methanol storage tank (141) to the methanol heating unit (150); a methanol supply control valve (144) for controlling the flow rate of methanol supplied to the methanol heating unit (150); and a supply control unit (147) for controlling the operating state of the methanol supply pump (142) and the degree of opening of the methanol supply control valve (144) according to the required flow rate of the methanol heating unit (150), for a waste heat recovery storage and heat supply system for unloading low-temperature methanol of a heterogeneous cargo carrier. Claim 10 In claim 1, the methanol heating unit (150) comprises: a methanol heat exchange unit (151) that performs heat exchange between low-temperature methanol supplied from the methanol supply unit (140) and a heating heat medium supplied from the thermal energy storage system (130); a heat medium supply unit (152) that delivers the heating heat medium supplied from the thermal energy storage system (130) to the methanol heat exchange unit (151) and recovers the heat medium after heat exchange is completed back toward the thermal energy storage system (130); and a second temperature measuring unit (154) that measures the inlet and outlet methanol temperatures of the methanol heat exchange unit (151). A waste heat recovery storage and heat supply system for unloading low-temperature methanol of a heterogeneous cargo carrier, further comprising a second flow rate measuring unit (155) for measuring the flow rate of the methanol or heating medium, wherein the integrated control unit (170) analyzes information input from the second temperature measuring unit (154) and the second flow rate measuring unit (155) and controls the supply of heat medium by opening the control valve of the heat medium supply unit (152) to increase the supply amount of heat medium when the outlet side methanol temperature is lower than the target temperature rise, and to decrease the supply amount of heat medium when it is higher than the target temperature rise.

Images