ORC power cycle test method and delivery test method

Abstract

The invention discloses an ORC power cycle test method and a factory test method.The ORC power cycle system comprises a turbine expansion generator set, a preheater, an evaporator, a working medium pump, a heat regenerator and a condenser and further comprises a test instrument used for measuring and outputting measurement indexes of the ORC power cycle system. According to the delivery test method, heat conduction oil is used as a heat source, circulating cooling water is used as a cold source, cyclopentane is used as a circulating organic working medium, and the method aims at verifying the reasonability of a process design scheme, the feasibility of power circulation and the overall performance, protecting the sea with land, preventing problems from being brought to an offshore debugging stage and reducing the offshore debugging operation risk. The problems that a traditional skid-mounted product test program is too simple, the offshore debugging workload is often large, control over the construction period is not facilitated, and the reasonability of a process design scheme, the feasibility of power circulation and the reliability of a whole unit cannot be effectively verified are solved.

Description

Technical Field

[0001] The invention belongs to the field of ORC power generation device testing, and in particular relates to an ORC power cycle test method and a factory test method. Background Art

[0003] Low-temperature waste heat recovery and reuse technology is an energy-saving technology that utilizes waste heat generated in the industrial production process and converts it into usable energy through heat exchange, heat-to-work conversion and other means. This technology has the advantages of energy saving, environmental protection, and high economic benefits. The traditional skid-mounted test procedure cannot guarantee the performance of the ORC low-temperature waste heat power generation equipment before leaving the factory, resulting in problems being brought to the offshore commissioning stage, increasing the risk of offshore commissioning operation. The test procedure is too simple, often resulting in a large workload for offshore commissioning, which is not conducive to the control of the construction period, and cannot effectively verify the rationality of the process design scheme, the feasibility of the power cycle, and the reliability of the overall unit.

[0004] Therefore, it is urgent to design an ORC power cycle test method and a factory test method to solve the above-mentioned problems. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology that the traditional skid-mounted product test procedure is too simple, often resulting in a large workload for offshore commissioning, which is not conducive to the control of the construction period and cannot effectively verify the rationality of the process design scheme, the feasibility of the power cycle, and the reliability of the overall unit, an ORC power cycle test method and a factory test method are provided.

[0006] To achieve the above purpose, the specific technical scheme of an ORC power cycle test method and a factory test method of the present invention is as follows: An ORC power cycle test method, wherein the ORC power cycle system includes a turbine expansion generator set, a preheater, an evaporator, a working fluid pump, a regenerator, and a condenser. The ORC power cycle system also includes a test instrument for measuring and outputting measurement indicators of the ORC power cycle system, including the following steps: Heat transfer oil is introduced, and the temperature rise rate of cyclopentane is not more than 60℃ / h, and the pressure rise rate is not more than 0.1MPa / min; Turn on the working fluid pump, keep the evaporator and condenser liquid levels within the normal range, increase the flow of the heat transfer oil, and set the increase to 1%-5% until the turbine expansion generator set load is reached; Start the turbine expansion generator set, make its speed not exceed the first set speed, and check whether the output of the test instrument of the turbine expansion generator set is normal; Adjust the flux of the turbine expansion generator set inlet regulating valve and bypass pipeline manual valve, and gradually increase the speed of the turbine expansion generator set. When the speed of the turbine expansion generator set reaches the second set speed, continue to increase the load. When the generated power exceeds the first set power, check whether the output of the test instrument of the turbine expansion generator set is normal.

[0007] Furthermore, before the heat transfer oil is introduced, the method further comprises: Ensure that the inlet regulating valve of the turbine expansion generator set is in the closed state and the bypass valve is in the open state; Ensure that the oil pressure of the turbine expansion generator set is normal; The flow rate of heat transfer oil entering the test system is regulated by the heat medium boiler outlet control valve.

[0008] Furthermore, the method of introducing the heat transfer oil is: first introduce 5% of the preset flow rate of the heat transfer oil, and then increase the flow rate of the heat transfer oil with an increase rate set at 1%-5% until all the heat transfer oil is introduced.

[0009] Furthermore, the first set speed is 500 rpm, the second set speed is 3000 r / min, and the first set power is 10 kW·h.

[0010] A factory test method applicable to an offshore platform ORC power generation device includes the above-mentioned ORC power cycle test method, and before performing the ORC power cycle test method, further includes the following steps: Cooling water system test: start the cooling water pump and clean the pipes to ensure that the system cleanliness meets the requirements. During this period, use a flow meter to measure the flow and pressure of the cooling water system to ensure stable pressure and normal operation of the system. Thermal oil system test: fill the thermal oil pipe loop with thermal oil, open all the thermal oil side exhaust ports on the pipeline and the upper part of the equipment to exhaust the gas in the system, then close all the exhaust ports, adjust the flow of thermal oil into the test system, and test the heating rate of cyclopentane; Working fluid pump test, adjust the working fluid pump frequency to control the cyclopentane flow rate to not be lower than the minimum circulation flow rate.

[0011] Furthermore, before the system test is conducted, various test tables and logic diagrams are prepared according to the various components and working principles of the ORC power generation device.

[0012] Furthermore, prior to conducting the system test, a visual inspection of the turbine expander generator set, instrumentation and pipeline connections is also included.

[0013] Furthermore, the temperature rise of the sliding bearing of the working fluid pump shall not exceed 40°C, and the temperature rise of the rolling bearing shall not exceed 50°C.

[0014] Furthermore, the maximum temperature of the sliding bearing does not exceed 85°C, and the maximum temperature of the rolling bearing does not exceed 95°C.

[0015] Furthermore, it also includes: Test the lubricating oil system to ensure that the lubricating oil in the condenser is flowing normally. Turn on the condenser to make the temperature of the lubricating oil lower than 60 degrees after cooling. The oil tank level transmitter is between 36.7%-85%. The oil supply main pipe pressure is greater than 0.3MPag, and the pressure difference before and after the filter is less than 100kPa.

[0016] The factory test method for an ORC power generation device on an offshore platform of the present invention has the following advantages: using heat transfer oil as a heat source, circulating cooling water as a cold source, and cyclopentane as a circulating organic working fluid, the method aims to verify the rationality of a process design scheme, the feasibility of a power cycle, and the overall performance, thereby protecting the sea from land, avoiding bringing problems to the offshore commissioning stage, and reducing the risk of offshore commissioning operations, and overcoming the problem that a traditional skid-mounted product test procedure is too simple, often resulting in a large workload for offshore commissioning, being unfavorable for the control of the construction period, and being unable to effectively verify the rationality of a process design scheme, the feasibility of a power cycle, and the reliability of the overall unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the ORC power cycle system of the present invention; Figure 2 It is a flow chart of the ORC power cycle test method of the present invention; Figure 3 The present invention is a flow chart of a factory test method for an ORC power generation device on an offshore platform.

[0018] Description of the markings in the figure: 1. Turbine expansion generator set; 2. Preheater; 3. Evaporator; 4. Working fluid pump; 5. Regenerator; 6. Condenser. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 3 The invention describes an ORC power cycle test method and a factory test method.

[0022] This embodiment provides an ORC power cycle test method, such as Figure 1 and Figure 2 As shown, the ORC power cycle system includes a turbine expansion generator set 1, a preheater 2, an evaporator 3, a working fluid pump 4, a regenerator 5, and a condenser 6. The ORC power cycle system also includes a test instrument for measuring and outputting measurement indicators of the ORC power cycle system, including the following steps: Heat transfer oil is introduced, and the temperature rise rate of cyclopentane is not more than 60℃ / h, and the pressure rise rate is not more than 0.1MPa / min; Start the working fluid pump 4, keep the liquid levels of the evaporator 3 and the condenser 6 within the normal range, increase the flow rate of the heat transfer oil, and set the increase rate to 1%-5% until the load of the turbine expansion generator set 1 is reached; Start the turbine expansion generator set 1, make its rotation speed not exceed the first set rotation speed, and check whether the output of the test instrument of the turbine expansion generator set 1 is normal; Adjust the flux of the inlet regulating valve and the bypass pipeline manual valve of the turbine expansion generator set 1, and gradually increase the speed of the turbine expansion generator set 1. When the speed of the turbine expansion generator set 1 reaches the second set speed, continue to increase the load. When the generated power exceeds the first set power, check whether the output of the test instrument of the turbine expansion generator set 1 is normal.

[0023] Furthermore, before the heat transfer oil is introduced, the method further comprises: Ensure that the inlet regulating valve of turbine expansion generator set 1 is in the closed state and the bypass valve is in the open state; Ensure that the oil pressure of turbine expansion generator set 1 is normal; The flow rate of heat transfer oil entering the test system is regulated by the heat medium boiler outlet control valve.

[0024] Furthermore, the method of introducing the heat transfer oil is: first introduce 5% of the preset flow rate of the heat transfer oil, and then increase the flow rate of the heat transfer oil with an increase rate set at 1%-5% until all the heat transfer oil is introduced.

[0025] Furthermore, the first set speed is 500 rpm, the second set speed is 3000 r / min, and the first set power is 10 kW·h.

[0026] This embodiment also provides a factory test method applicable to an offshore platform ORC power generation device, such as Figure 1 and Figure 3 As shown, including the above-mentioned ORC power cycle test method, before performing the ORC power cycle test method, the following steps are also included: Cooling water system test: start the cooling water pump and clean the pipes to ensure that the system cleanliness meets the requirements. During this period, use a flow meter to measure the flow and pressure of the cooling water system to ensure stable pressure and normal operation of the system. Thermal oil system test: fill the thermal oil pipe loop with thermal oil, open all the thermal oil side exhaust ports on the pipeline and the upper part of the equipment to exhaust the gas in the system, then close all the exhaust ports, adjust the flow of thermal oil into the test system, and test the heating rate of cyclopentane; The working fluid pump 4 is tested and the frequency of the working fluid pump 4 is adjusted to control the cyclopentane flow rate to be not less than the minimum circulation flow rate.

[0027] This factory test method uses heat transfer oil as the heat source, circulating cooling water as the cold source, and cyclopentane as the circulating organic working fluid. It aims to verify the rationality of the process design scheme, the feasibility of the power cycle, and the overall performance, so as to avoid bringing problems to the offshore commissioning stage and reduce the risk of offshore commissioning operations. It overcomes the problem that the traditional skid-mounted product test procedures are too simple, often resulting in a large workload for offshore commissioning, which is not conducive to the control of the construction period and cannot effectively verify the rationality of the process design scheme, the feasibility of the power cycle, and the reliability of the overall unit. Furthermore, before the system test is conducted, various test tables and logic diagrams are prepared according to the various components and working principles of the ORC power generation device.

[0028] Furthermore, before the system test is performed, a visual inspection of the turbine expansion generator set 1, instruments and pipeline connections is also performed.

[0029] It should be noted that before conducting system testing, the documents that need to be prepared in advance include: system P&ID diagrams and subsystem P&ID diagrams of various components, heat exchange calculation files, cause-and-effect diagrams, control logic diagrams, electrical equipment lists, inspection and test plans, terminal wiring diagrams, system operation and maintenance manuals, cooling tower operation manuals, heat medium boiler operation manuals, etc.

[0030] Optionally, before conducting system testing, it is also necessary to complete the main equipment in place, pipeline installation, electrical instrument equipment installation, cable laying and wiring, pipeline pressure testing, purging, instrument single-point debugging, electrical debugging, interlocking debugging and other work and meet the test standards.

[0031] Optionally, before the system test, it is necessary to perform inspection work, including but not limited to electrical inspection, temperature inspection, pressure inspection, liquid level inspection, pipeline system inspection, turbine expander generator set inspection and working fluid pump 4 inspection. The above inspection steps are described in detail below: Electrical inspection: check whether the wiring of diesel generators, transformers, dry resistors, low-voltage distribution boxes, air compressors, UPS cabinets, inverter cabinets, PLC cabinets, and SIS cabinets is normal, and ensure that all electrical equipment is powered normally.

[0032] Temperature check: check whether the displayed values ​​of the thermometer and temperature transmitter on the heat transfer oil side are consistent and normal; check whether the temperature values ​​measured by the thermometer and temperature transmitter on the cyclopentane side and cooling water side are normal temperature and the displayed values ​​are consistent.

[0033] Pressure check: Check whether the displayed values ​​of all pressure gauges and pressure transmitters on the thermal oil side are consistent. Check whether the displayed values ​​of all pressure gauges and pressure transmitters on the thermal oil side are consistent.

[0034] Liquid level check: check whether the liquid level values ​​displayed by all local liquid level meters and liquid level transmitters are consistent.

[0035] Cyclopentane is added, no heat transfer oil can be stored on the cyclopentane side of evaporator 3 and preheater 2, the vacuum degree on the cyclopentane side meets the requirements, and the outlet valve of working fluid pump 4 is closed.

[0036] Pipeline system inspection mainly includes cooling water system inspection, thermal oil system inspection and cyclopentane pipeline system inspection.

[0037] Check the turbine expander generator set. The inlet adjustment and emergency shut-off valve of the turbine expander are in the closed state, the bypass shut-off valve and the bypass pipeline manual valve are in the open state, the lubricating oil system should be lubricated for at least 30 minutes, the cooling water of the oil condenser 6 is in normal use, and the oil supply pressure is normal.

[0038] Check the working fluid pump 4, close the outlet valve, open the bypass valve; fully open the inlet valve to fill the liquid, and open all the exhaust pipes of the pump group equipment to discharge the gas. After the gas is fully exhausted, close the exhaust valve.

[0039] Furthermore, the temperature rise of the sliding bearing of the working fluid pump 4 shall not exceed 40°C, and the temperature rise of the rolling bearing shall not exceed 50°C.

[0040] Furthermore, the maximum temperature of the sliding bearing does not exceed 85°C, and the maximum temperature of the rolling bearing does not exceed 95°C.

[0041] Furthermore, it also includes: Test the lubricating oil system to ensure that the lubricating oil in condenser 6 is flowing normally. Open condenser 6 to make the lubricating oil cool to a temperature lower than 60°C, the oil tank level transmitter is between 36.7% and 85%, the oil supply main pipe pressure is greater than 0.3MPag, and the pressure difference before and after the filter is less than 100kPa.

[0042] It should be noted that after completing the factory test, a test form and a list of remaining items need to be prepared for subsequent verification or proofreading.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A test method for an ORC power cycle test, wherein the ORC power cycle system comprises a turbine expansion generator set, a preheater, an evaporator, a working fluid pump, a regenerator, and a condenser, and the ORC power cycle system also comprises a test instrument for measuring and outputting measurement indicators of the ORC power cycle system, characterized in that: The following steps are involved: Heat transfer oil is introduced, and the temperature rise rate of cyclopentane is not more than 60℃ / h, and the pressure rise rate is not more than 0.1MPa / min; Turn on the working fluid pump, keep the evaporator and condenser liquid levels within the normal range, increase the flow of the heat transfer oil, and set the increase to 1%-5% until the turbine expansion generator set load is reached; Start the turbine expansion generator set, make its speed not exceed the first set speed, and check whether the output of the test instrument of the turbine expansion generator set is normal; Adjust the flux of the turbine expansion generator set inlet regulating valve and bypass pipeline manual valve, and gradually increase the speed of the turbine expansion generator set. When the speed of the turbine expansion generator set reaches the second set speed, continue to increase the load. When the generated power exceeds the first set power, check whether the output of the test instrument of the turbine expansion generator set is normal.

2. The ORC power cycle test method according to claim 1, characterized in that: Before the introduction of thermal oil, it also includes: Ensure that the inlet regulating valve of the turbine expansion generator set is in the closed state and the bypass valve is in the open state; Ensure that the oil pressure of the turbine expansion generator set is normal; The flow rate of heat transfer oil entering the test system is regulated by the heat medium boiler outlet control valve.

3. The ORC power cycle test method according to claim 1, characterized in that: The method of introducing the heat transfer oil is: first introduce 5% of the preset flow rate of the heat transfer oil, then increase the flow rate of the heat transfer oil with an increase rate set at 1%-5% until all the heat transfer oil is introduced.

4. The ORC power cycle test method according to claim 1, characterized in that: The first set speed is 500 rpm, the second set speed is 3000 r / min, and the first set power is 10 kW·h.

5. A factory test method for an ORC power generation device on an offshore platform, comprising the ORC power cycle test method according to any one of claims 1 to 4, characterized in that: The following steps are also included before the ORC power cycle test method is performed: Cooling water system test: start the cooling water pump and clean the pipes to ensure that the system cleanliness meets the requirements. During this period, use a flow meter to measure the flow and pressure of the cooling water system to ensure stable pressure and normal operation of the system. Thermal oil system test: fill the thermal oil pipe loop with thermal oil, open all the thermal oil side exhaust ports on the pipeline and the upper part of the equipment to exhaust the gas in the system, then close all the exhaust ports, adjust the flow of thermal oil into the test system, and test the heating rate of cyclopentane; Working fluid pump test, adjust the working fluid pump frequency to control the cyclopentane flow rate to not be lower than the minimum circulation flow rate.

6. The factory test method for an ORC power generation device on an offshore platform according to claim 5, characterized in that: Before conducting system testing, it is also necessary to prepare various test tables and logic diagrams based on the various components and working principles of the ORC power generation device.

7. The factory test method for an ORC power generation device on an offshore platform according to claim 5, characterized in that: System testing also includes a visual inspection of the turbine expander generator set, instrumentation and pipeline connections before proceeding.

8. The factory test method for an offshore platform ORC power generation device according to claim 5, characterized in that: The temperature rise of the sliding bearing of the working fluid pump shall not exceed 40℃, and the temperature rise of the rolling bearing shall not exceed 50℃.

9. The factory test method for an offshore platform ORC power generation device according to claim 8, characterized in that: The maximum temperature of sliding bearings shall not exceed 85°C, and the maximum temperature of rolling bearings shall not exceed 95°C.

10. The factory test method applicable to an offshore platform ORC power generation device according to claim 5, characterized in that: Also includes: Test the lubricating oil system to ensure that the lubricating oil in the condenser flows normally. Turn on the condenser to make the lubricating oil cool to a temperature below 60°C, the oil tank level transmitter is between 36.7%-85%, the oil supply main pipe pressure is greater than 0.3MPag, and the pressure difference before and after the filter is less than 100kPa.

Images