Solar heat pump system and design method using design platform of solar heat pump system

Abstract

The present invention provides a solar heat pump fusion system. In one embodiment, the solar heat pump fusion system for supplying a high-temperature fluid to a heat demand location comprises: a solar heat collection device including a collector; a heat pump device including a compressor, a condenser, an expander, and an evaporator; a thermal storage tank for storing fluid heated by the solar heat collection device and the heat pump device; a supply device for supplying the fluid stored in the thermal storage tank to a heat demand location; and a controller for controlling the solar heat collection device, the heat pump device, and the supply device. The controller can control the solar heat collection device, the heat pump device, and the supply device so that the amount of heat required at the heat demand location is produced in the order of i) the solar heat collection device, ii) the heat pump device, and supplied to the heat demand location.

Description

Technology Field

[0001] The present invention relates to a solar heat pump fusion system and a design method using a design platform thereof, and more specifically, to a system in which a solar heat collection device and a heat pump system are fused and a design method thereof. Background Technology

[0003] Currently, more than 60% of the nation's total energy consumption is ultimately consumed in the form of thermal energy. This largely consists of fossil fuel consumption. However, to address climate change, there is a need to reduce fossil fuel-based energy consumption at the national level.

[0004] Solar thermal energy is a representative eco-friendly thermal energy source that can replace fossil fuels. However, while solar thermal energy utilizes solar collectors to heat water for heating or hot water supply, there are drawbacks, such as the limited capacity of thermal storage tanks and the inability to use heating or hot water during prolonged cloudy weather.

[0005] In addition, increasing the size of solar collectors and solar thermal storage tanks leads to increased installation area and manufacturing costs, resulting in reduced economic feasibility.

[0006] Accordingly, economic efficiency is also sought by utilizing a system that combines a solar collector and a solar thermal storage tank, or by using a fusion system that additionally combines other heat sources with the solar collector or solar thermal storage tank.

[0007] However, even these fusion systems have limited use due to their lower economic efficiency and reliability compared to conventional boilers. Additionally, most existing fusion systems supply hot water below 70°C, so they do not supply high-temperature water or steam above 80°C. Consequently, fusion systems for industrial processes that utilize large amounts of such high-temperature water and steam are not widely adopted.

[0008] Accordingly, there is a growing need to supply the high-temperature heat required for industrial processes more economically than existing heat supply facilities by combining a heat pump with a solar thermal system to enhance the reliability of heat supply, and by optimizing the design and operating the system in conjunction with existing heat supply facilities to improve economic efficiency.

[0009] Meanwhile, design optimization of the integrated system is necessary to develop a more economical system than conventional boilers. Generally, there are numerous considerations for heat supply facilities in industrial processes. For instance, environmental conditions vary from site to site, including the type of existing heat supply equipment (gas boiler, electric boiler, heat pump, geothermal heat pump, etc.), the presence and specifications of waste heat, required heat quantity, required temperature, required pressure, type of fluid (hot water, steam), solar radiation, ambient temperature, available site area and shape, distance from the heat load source, and heat load hour distribution.

[0010] Furthermore, there are numerous design variables, including the type and capacity of solar collectors, the capacity of thermal storage tanks, the type and capacity of heat pumps, and whether or not they are integrated with existing heat supply facilities. The design process for optimization, which considers these many environmental and design variables, must undergo an iterative cycle ranging from conceptual design to basic design, performance simulation, and analysis. However, since the aforementioned environmental variables vary not only from site to site but also differ over time within the same site, there is a problem in that the design deviates from the optimal point and must be repeated every time. This repetitive design leads to increased time and costs, which has been a key cause of reduced economic viability of the overall integrated system and a loss of competitiveness.

[0011] To address this, it is necessary to develop a design platform for a convergence system that can perform the optimal design of the convergence system in a short period of time by considering all of the aforementioned environmental and design variables. The problem to be solved

[0013] To solve the aforementioned problems, the present invention aims to provide a solar heat pump fusion system capable of providing a high heat supply temperature and a design method using the same's design platform.

[0014] In addition, the present invention aims to provide a solar heat pump fusion system capable of utilizing existing heat supply equipment and a design method using the same's design platform.

[0015] The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0017] In order to solve the problem described above, the present invention provides a solar heat pump fusion system. In one embodiment, a solar heat pump fusion system for supplying a high-temperature fluid to a heat demand location comprises: a solar heat collection device including a collector; a heat pump device including a compressor, a condenser, an expander, and an evaporator; a thermal storage tank for storing fluid heated by the solar heat collection device and the heat pump device; a supply device for supplying the fluid stored in the thermal storage tank to a heat demand location; and a controller for controlling the solar heat collection device, the heat pump device, and the supply device. The controller can control the solar heat collection device, the heat pump device, and the supply device so that the amount of heat required at the heat demand location is produced in the order of i) the solar heat collection device, ii) the heat pump device, and supplied to the heat demand location.

[0018] In one embodiment, an existing heating device at a heat demand location may be further included at the upstream or downstream end of the supply device, which serves as an auxiliary heat source for the heat pump device.

[0019] In one embodiment, the controller can control the solar heat collector, the heat pump, the conventional heating device, and the supply device so that the amount of heat required at the heat demand site is produced in the order of i) the solar heat collector, ii) the heat pump device, and iii) the conventional heating device and supplied to the heat demand site.

[0020] In one embodiment, the solar heat collection device and the heat pump device can be connected in parallel to the thermal storage tank.

[0021] In one embodiment, the thermal storage tank includes a first thermal storage tank and a second thermal storage tank, and a solar heat collection device, a first thermal storage tank, a heat pump device, and a second thermal storage tank may be connected sequentially in series.

[0022] In one embodiment, the thermal storage tank includes a first thermal storage tank and a second thermal storage tank, and a heat pump device, a first thermal storage tank, a solar heat collection device, and a second thermal storage tank may be connected sequentially in series.

[0023] In one embodiment, a solar heat collection device, a thermal storage tank, and a heat pump device may be connected sequentially in series.

[0024] In addition, the present invention provides a design method using a design platform for a solar heat pump fusion system. In one embodiment, the method comprises: a heat demand location condition input step of inputting the heat amount required at the heat demand location, the environmental conditions of the heat demand location, and information on the existing heating device at the heat demand location into the design platform; a performance and cost data input step of inputting performance data and cost data of a solar heat collection device and a heat pump device into the design platform; and a setting step of determining operational economic feasibility based on the input values ​​entered through the heat demand location condition input step and the performance and cost data input step, and setting the capacity of the heat pump device, the capacity of the thermal storage tank, and the specifications of the solar heat collection device.

[0025] In one embodiment, if an existing heating device exists, the possibility of integrating the solar heat collection device and the heat pump device with the existing heating device can be determined in the setting step.

[0026] In one embodiment, the setting step is based on the premise that the amount of heat required at the heat demand location is produced and supplied to the heat demand location in the order of i) solar heat collection device, ii) heat pump device, and that if the fusion of existing heating devices is possible, the existing heating devices are used as auxiliary heat sources for the heat pump device.

[0027] In one embodiment, the performance data may include the supplyable temperature of the solar heat collection device, the amount of heat collected per unit area, the heat collection efficiency, and the capacity.

[0028] In one embodiment, the performance data may include the heat source temperature, water outlet temperature, COP, and capacity of the heat pump device.

[0029] In one embodiment, cost data may include product price, installation cost, and operating cost.

[0030] In one embodiment, operational economics may include CAPEX (Capital expenditure), OPEX (Operating expenditure), NPV (Net present value), ROI (Return on Investment), Payback time, and LCOH (Levelized cost of heat).

[0031] In one embodiment, the environmental conditions of the heat demand location include the required temperature, required pressure, and type of the fluid used at the heat demand location, the climatic conditions of the heat demand location, the available site area and shape of the heat demand location, the distance from the heat load location, and the heat load time distribution.

[0032] In one embodiment, existing heating device information includes whether an existing heating device exists at the heat demand location, its type, whether waste heat is present, and its specifications. Effects of the invention

[0034] According to the present invention, the invention has the advantage of being able to provide a high heat supply temperature in an environmentally friendly and economical manner.

[0035] In addition, according to the present invention, there is an advantage of being able to utilize existing heat supply equipment.

[0036] The effects of the present invention are not limited to the effects described above, and unmentioned effects will be clearly understood by those skilled in the art from this specification and the attached drawings. Brief explanation of the drawing

[0038] Figure 1 shows the appearance of a solar heat pump fusion system according to one embodiment of the present invention. FIGS. 2 to 4 each show the appearance of a solar heat pump fusion system according to different embodiments of the present invention. Figure 5 shows a flowchart of a design method using the design platform of the solar heat pump fusion system of the present invention. FIG. 6 illustrates a method for designing using a design platform for a solar heat pump fusion system according to one embodiment of the present invention. FIGS. 7 to 10 each show an example of a solar heat pump fusion system designed using the design platform of the solar heat pump fusion system of the present invention. Specific details for implementing the invention

[0039] The embodiments described in this specification may be modified in various different forms, and the technology according to one embodiment is not limited to the embodiments described below. Furthermore, the embodiment of one embodiment is provided to more fully explain the present disclosure to those skilled in the art.

[0040] Additionally, the singular form used in the specification and the appended claims may be intended to include the plural form unless specifically indicated otherwise in the context.

[0041] Additionally, the numerical ranges used in this specification include lower and upper limits and all values ​​within the range, increments logically derived from the form and width of the defined range, all of which are limited values, and all possible combinations of upper and lower limits of numerical ranges defined in different forms. Unless otherwise specifically defined in this specification, values ​​outside the numerical range that may occur due to experimental error or rounding are also included in the defined numerical range.

[0042] Furthermore, throughout the specification, the term "comprising" a component means that, unless specifically stated otherwise, it does not exclude other components but rather may include additional components.

[0043] FIG. 1 shows the appearance of a solar heat pump fusion system (1000) according to one embodiment of the present invention. Referring to FIG. 1, the solar heat pump fusion system (1000) includes a solar heat collection device (100), a heat pump device (200), a thermal storage tank (300), a supply device (400), and a controller (not shown).

[0044] A solar heat collection device (100) is provided with a collector (110). A heat pump device (200) is provided to ensure a smooth supply of heated fluid to heat demand locations even when solar heat weakens due to cloudy weather or approaching sunset. In one example, the heat pump device (200) can be operated when the temperature of the liquid stored in the thermal storage tank (300) is lower than a preset reference value.

[0045] In one example, the heat pump device (200) may include a compressor (203), a condenser (202), an expansion valve (204), and an evaporator (201). The compressor (203) serves to compress the refrigerant to a high temperature and high pressure. The condenser (202) serves to heat the fluid by exchanging heat between the high-temperature refrigerant and a relatively low-temperature fluid, the expansion valve serves to expand the refrigerant that has passed through the condenser (202), and the evaporator (201) serves to cool the fluid by exchanging heat between the expanded low-temperature refrigerant and a relatively high-temperature fluid.

[0046] In one example, the heat pump device (200) may be a heat pump device (200) available on the market.

[0047] The thermal storage tank (300) stores fluid heated by the solar heat collection device (100) and the heat pump device (200). The supply device (400) supplies the fluid stored in the thermal storage tank (300) to a heat demand location. In one example, the supply device (400) may supply the heated fluid to a heat demand location in the form of liquid or steam.

[0048] A controller (not shown) controls a solar heat collection device (100), a heat pump device (200), and a supply device (400). In one example, the controller (not shown) can control the solar heat collection device (100), the heat pump device (200), and the supply device (400) so that the amount of heat required at a heat demand location is produced in the order of i) solar heat collection device (100) and ii) heat pump device (200) and supplied to the heat demand location.

[0049] In one example, the solar heat pump fusion system (1000) may further include an existing heating device (not shown) provided to a heat demand location. In one example, the existing heating device (not shown) may be used as an auxiliary heat source.

[0050] In one example, an existing heating device (not shown) may be located upstream of the supply device (400). When an existing heating device (not shown) is provided, a controller (not shown) may control the solar heat collection device (100), the heat pump device (200), and the supply device (400) so that the amount of heat required at the heat demand location is produced in the order of i) solar heat collection device (100), ii) heat pump device (200), and iii) existing heating device (not shown) and supplied to the heat demand location.

[0051] As shown in FIG. 1, the solar heat collection device (100) and the heat pump device (200) can be connected in parallel to the thermal storage tank (300). However, alternatively, the solar heat collection device (100) and the heat pump device (200) can be connected in series with the thermal storage tank (300).

[0052] FIGS. 2 to 4 each show the appearance of a solar heat pump fusion system (1000) according to another embodiment of the present invention.

[0053] Referring to FIG. 2, the thermal storage tank (300) includes a first thermal storage tank (301) and a second thermal storage tank (302), and the solar heat collection device (100), the first thermal storage tank (301), the heat pump device (200), and the second thermal storage tank (302) can be connected sequentially in series.

[0054] Referring to FIG. 3, the thermal storage tank (300) includes a first thermal storage tank (301) and a second thermal storage tank (302), and the heat pump device (200), the first thermal storage tank (301), the solar heat collection device (100), and the second thermal storage tank (302) can be connected in series sequentially.

[0055] Referring to FIG. 4, a solar heat collection device (100), a thermal storage tank (300), and a heat pump device (200) can be connected sequentially in series.

[0056] In addition, the present invention provides a design method using a design platform for a solar heat pump fusion system (1000).

[0057] Hereinafter, with reference to FIGS. 5 to 11, a design method using the design platform of the solar heat pump fusion system (1000) of the present invention will be described.

[0058] FIG. 5 shows a flowchart of a design method using a design platform of a solar heat pump fusion system (1000) of the present invention. Referring to FIG. 5, the design method using a design platform of a solar heat pump fusion system (1000) includes a heat demand location condition input step (S10), a performance and cost data input step (S20), and a setting step (S30).

[0059] In the heat demand location condition input step (S10), the required heat quantity, required temperature, required pressure, type of fluid, climate conditions of the heat demand location, available site area and shape of the heat demand location, distance from the heat load location, heat load time distribution, presence or type of existing heating device at the heat demand location, presence or absence of waste heat, and specifications are input into the design platform. In one example, climate conditions may include solar radiation, ambient temperature, etc.

[0060] In the performance and cost data input step (S20), performance data and cost data of the solar heat collection device (100) and heat pump device (200) are input into the design platform.

[0061] In one example, performance data may include the supplyable temperature of the solar heat collection device (100), the amount of heat collected per unit area, the heat collection efficiency, and the capacity.

[0062] In one example, performance data may include the heat source temperature, water outlet temperature, COP, and capacity of the heat pump device (200).

[0063] In one example, cost data may include product price, installation cost, and operating cost.

[0064] In the setting step (S30), the capacity of the heat pump device (200), the capacity of the thermal storage tank, and the specifications of the solar heat collection device (100) are set by determining the operational economic feasibility based on the input values ​​entered through the heat demand location condition input step (S10) and the performance and cost data input step.

[0065] In one example, operational economics may include CAPEX (Capital expenditure), OPEX (Operating expenditure), NPV (Net present value), ROI (Return on Investment), Payback time, and LCOH (Levelized cost of heat).

[0066] In one example, if an existing heating device exists, in the setting step (S30), it can be determined whether the solar heat collection device (100) and the heat pump device (200) can be combined with the existing heating device.

[0067] In one example, the setting step (S30) is based on the premise that the amount of heat required at the heat demand location is produced in the order of i) solar heat collection device (100) and ii) heat pump device (200) and supplied to the heat demand location, and that if the existing heating device can be integrated, the existing heating device is used as an auxiliary heat source for the heat pump device (200).

[0068] In one example, the condition for an existing heating device to be used as an auxiliary heat source for a heat pump device (200) can be determined by considering the operational economy.

[0070] FIG. 6 illustrates a method of designing using a design platform for a solar heat pump fusion system (1000) according to one embodiment of the present invention.

[0071] In the heat demand location condition input step (S10), the amount of heat required at the heat demand location, the environmental conditions of the heat demand location, and whether there is an existing heating device at the heat demand location are input into the design platform. In one example, as shown in FIG. 6, depending on whether waste heat is generated at the heat demand location and the process temperature of the heat demand location, the capacity of the heat pump device (200), the specifications of the solar heat collection device (100), and whether there is an existing heating device can be determined.

[0072] For example, if waste heat is generated at a heat demand location and the process temperature at the heat demand location is 180 degrees Celsius, a heat pump device (200) with a capacity to heat the fluid to 120 degrees Celsius is selected, a solar heat collection device (100) capable of heating the fluid to 90 degrees Celsius is selected, and a steam generator provided as an existing heating device is decided to be combined.

[0073] To this end, the design platform of the solar heat pump fusion system (1000) stores in advance information regarding the maximum fluid heating temperature according to the capacity of the heat pump device (200), information regarding the maximum fluid heating temperature of the solar heat collection device (100) according to the specifications of the collector (110) of the solar heat collection device (100), and information regarding the heat capacity generated by the existing heating device.

[0074] Hereinafter, a solar heat pump fusion system (1000) designed using a design platform of a solar heat pump fusion system (1000) will be described with reference to FIGS. 7 to 10. The above-described supply device is described as being fused or merged with an existing heating device (600) shown in FIGS. 7 to 10.

[0075] FIG. 7 shows an embodiment of a solar heat pump fusion system (1000) designed using the design platform of the solar heat pump fusion system (1000) of the present invention.

[0076] FIG. 7 shows a system (1000) that incorporates existing heating devices (600). In one example, when waste heat is generated at a heat demand location (500) and the process temperature of the heat demand location (500) is 180 degrees Celsius, a heat pump device (200) with a capacity to heat the fluid to 120 degrees Celsius is selected, a solar heat collection device (100) capable of heating the fluid to 90 degrees Celsius is selected, and a steam generator provided as an existing heating device (600) is decided to be incorporated.

[0077] FIGS. 8 to 10 each show different embodiments of a solar heat pump fusion system (1000) designed using the design platform of the solar heat pump fusion system (1000) of the present invention.

[0078] FIG. 8 illustrates a system (1000) in which an existing heating device (600) is unnecessary. In one example, waste heat is generated at a heat demand location (500), and when the process temperature of the heat demand location (500) is 120 degrees Celsius, a heat pump device (200) capable of heating the fluid to 120 degrees Celsius is selected, and a solar heat collection device (100) capable of heating the fluid to 90 degrees Celsius is selected. In this case, since the fluid at the desired temperature can be supplied to the heat demand location (500) without merging the existing heating device (600), the existing heating device (600) may not be merged. However, in terms of operational economics, it may be advantageous to use the existing heating device (600) as an auxiliary heat source as needed, so the steam generator, which is the existing heating device (600), can be merged and used as an auxiliary heat source.

[0079] FIG. 9 shows a system (1000) that incorporates existing heating devices (600). In one example, when no waste heat is generated at the heat demand location (500) and the process temperature of the heat demand location (500) is 182 degrees Celsius, a heat pump device (200) with a capacity to heat the fluid to 75 degrees Celsius is selected, a solar heat collection device (100) capable of heating the fluid to 65 degrees Celsius is selected, and a steam generator provided as an existing heating device (600) is decided to be incorporated.

[0080] FIG. 10 illustrates a system (1000) that requires operation in conjunction with an existing heating device (600) (LPG boiler). In one example, when the process temperature of a heat demand location (500) is 70 degrees Celsius, a heat pump device (200) with a capacity to heat the fluid to 70 degrees Celsius is selected, a solar heat collection device (100) capable of heating the fluid to 65 degrees Celsius is selected, and it is decided to operate in conjunction with the existing heating device (600).

[0081] According to the present invention, the solar heat pump fusion system (1000) has the advantage of being able to supply high-temperature heat in the most economical and eco-friendly way for the installed environment or situation.

[0082] In addition, according to the present invention, by fusing a solar heat collector, a heat pump device (200), and a conventional heating device, there is an advantage of being able to provide a solar heat pump fusion system (1000) capable of providing a high heat supply temperature.

[0083] In addition, according to the present invention, existing heat supply equipment can be utilized, which has the advantage of enabling manufacturing, installation, and operation to be implemented at a low cost.

[0084] As described above, the present disclosure has been explained by specific details and limited embodiments in this specification; however, this is provided merely to aid in a more comprehensive understanding of the present disclosure, and the present disclosure is not limited to the above embodiments. A person skilled in the art to which the present disclosure pertains can make various modifications and variations from this description.

[0085] Accordingly, the concept described in this specification is not limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept described in this specification.

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A solar heat pump fusion system for supplying a high-temperature fluid to a heat demand location, comprising: a solar heat collection device including a collector; a heat pump device including a compressor, a condenser, an expander, and an evaporator; a thermal storage tank for storing a fluid heated by the solar heat collection device and the heat pump device; a supply device for supplying the fluid stored in the thermal storage tank to the heat demand location; and a controller for controlling the solar heat collection device, the heat pump device, and the supply device, wherein the controller controls the solar heat collection device, the heat pump device, and the supply device so that the amount of heat required at the heat demand location is produced in the order of i) the solar heat collection device, ii) the heat pump device, and supplied to the heat demand location, and wherein the solar heat collection device and the heat pump device are connected in series to the thermal storage tank, and the thermal storage tank includes a first thermal storage tank and a second thermal storage tank, and wherein the solar heat collection device, the first thermal storage tank, the heat pump device, and the second thermal storage tank are sequentially connected in series. Claim 6 A solar heat pump fusion system for supplying a high-temperature fluid to a heat demand location, comprising: a solar heat collection device including a collector; a heat pump device including a compressor, a condenser, an expander, and an evaporator; a thermal storage tank for storing a fluid heated by the solar heat collection device and the heat pump device; a supply device for supplying the fluid stored in the thermal storage tank to the heat demand location; and a controller for controlling the solar heat collection device, the heat pump device, and the supply device, wherein the controller controls the solar heat collection device, the heat pump device, and the supply device so that the amount of heat required at the heat demand location is produced in the order of i) the solar heat collection device, ii) the heat pump device, and supplied to the heat demand location, and wherein the solar heat collection device and the heat pump device are connected in series to the thermal storage tank, and the thermal storage tank includes a first thermal storage tank and a second thermal storage tank, and wherein the heat pump device, the first thermal storage tank, the solar heat collection device, and the second thermal storage tank are sequentially connected in series. Claim 7 A solar heat pump fusion system for supplying a high-temperature fluid to a heat demand location, comprising: a solar heat collection device including a collector; a heat pump device including a compressor, a condenser, an expander, and an evaporator; a thermal storage tank for storing a fluid heated by the solar heat collection device and the heat pump device; a supply device for supplying the fluid stored in the thermal storage tank to the heat demand location; and a controller for controlling the solar heat collection device, the heat pump device, and the supply device, wherein the controller controls the solar heat collection device, the heat pump device, and the supply device so that the amount of heat required at the heat demand location is produced in the order of i) the solar heat collection device, ii) the heat pump device, and supplied to the heat demand location, and wherein the solar heat collection device and the heat pump device are connected in series to the thermal storage tank, and the solar heat collection device, the thermal storage tank, and the heat pump device are connected in series sequentially. Claim 8 delete Claim 9 delete Claim 10 delete Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete

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