CN112446600A - Energy efficiency evaluation method and evaluation device for comprehensive energy system - Google Patents
Energy efficiency evaluation method and evaluation device for comprehensive energy system Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 claims description 24
- 230000007613 environmental effect Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 14
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Abstract
The invention discloses an energy efficiency evaluation method of a comprehensive energy system, which solves the defects of the prior art and comprises the following steps: step 1, determining test contents and test conditions; step 2, testing the test content by using a testing device; step 3, obtaining a test result from the test device, and evaluating the test result through the evaluation content; and 4, obtaining the energy efficiency level of the comprehensive energy system according to the evaluation content result.
Description
Technical Field
The invention relates to the technical field of energy efficiency assessment, in particular to an energy efficiency assessment method and an energy efficiency assessment device for a comprehensive energy system.
Background
Under the energy crisis and environmental constraints, multiple energy complementation has become a hotspot discussed in academic circles and industrial circles in recent years, and it is a main problem of common attention of all countries in the world to explore how to improve the comprehensive energy utilization rate by utilizing multiple energy complementation under the environment-friendly premise, so that energy efficiency assessment is important.
Chinese patent publication No. CN110147568A discloses a comprehensive energy system energy efficiency assessment method and device, which comprises the following steps: constructing a comprehensive energy system model, wherein the comprehensive energy system model comprises a renewable energy power generation module, a distributed cogeneration module, a heat pump, a boiler and an electric refrigerator module, the input energy of the comprehensive energy system model comprises non-renewable energy power generation energy, renewable energy power generation energy and outsourcing electric energy, and the output energy is in a cold, hot and electric terminal energy form; and constructing an energy efficiency evaluation index system of the comprehensive energy system, wherein the energy efficiency evaluation index system comprises primary energy consumption, primary energy utilization rate, primary energy consumption saving rate, and consumption rate and efficiency of renewable energy. And establishing a scene energy efficiency evaluation method, determining the weight of each evaluation index, and acquiring the comprehensive evaluation result of the scene by combining each evaluation index with the weight.
In the above patent, the energy efficiency evaluation method and device for the integrated energy system only evaluate the energy conversion efficiency and the utilization of renewable or non-renewable energy, and do not consider the influence of energy utilization on the environment, so there is also the influence of non-evaluable energy utilization on the local environment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an energy efficiency evaluation method and an energy efficiency evaluation device of an integrated energy system.
The purpose of the invention is realized by the following technical scheme:
an energy efficiency evaluation method of an integrated energy system comprises the following steps:
step 1, determining test contents and test conditions;
step 2, testing the test content by using a testing device;
step 3, obtaining a test result from the test device, and evaluating the test result through the evaluation content;
and 4, obtaining the energy efficiency level of the comprehensive energy system according to the evaluation content result.
As a preferable scheme, in the step 1, the evaluation content includes indoor and outdoor environmental parameter tests, a heat pump unit performance test and an electric seasonal heat pump system performance test, and the evaluation content includes heat supply/cold effect evaluation of the heat pump system, performance evaluation of the heat pump system, energy saving benefit evaluation, environmental benefit evaluation and economic benefit evaluation.
As a preferable scheme, in the step 1, the test conditions include a use condition of the ground source heat pump system, a cooling and heating test time condition of the ground source heat pump system, a working condition of the ground source heat pump system, and an ambient temperature condition.
As a preferred scheme, the time condition of the cooling and heating test of the ground source heat pump system is specifically as follows: the refrigerating time of the ground source heat pump system is a typical refrigerating season, the heating time of the ground source heat pump system is a typical heating season, and if the ground source heat pump system is used in winter and summer, tests need to be respectively carried out in the typical refrigerating season and the typical heating season.
As a preferred scheme, the working condition of the ground source heat pump system is specifically as follows: the load factor of the ground source heat pump system during operation exceeds 80% of the rated value of the unit, the energy efficiency ratio of the ground source heat pump system exceeds 95% of the designed energy efficiency ratio, and the total load factor of the ground source heat pump system exceeds 60% of the designed total load factor.
Preferably, the environment temperature condition is to detect the outdoor temperature and monitor the outdoor temperature change condition when the ground source heat pump system is tested.
As a preferable scheme, the method for testing indoor and outdoor environmental parameters comprises the following steps: according to the plane arrangement condition of the building, a part of typical areas and rooms are selected, temperature and humidity measuring instruments are respectively arranged in the typical areas and outdoors, the change conditions of indoor and outdoor temperature and humidity during the test period are monitored, the indoor temperature and humidity detection during the test period is carried out after the building is thermally stable, and the test time is 6 hours.
As a preferred scheme, the heat pump system heat supply/cold effect evaluation method is that the guarantee rate of the indoor temperature is calculated according to the indoor temperature detection result during the test period; the performance test method of the heat pump unit comprises the following steps:
the heating (cooling) capacity of the heat pump unit is equal to V · ρ · c · Δ twV-flow rate of frozen (hot) water, rho-density of frozen (hot) water, c-specific heat at constant pressure of frozen water, delta twInlet and outlet temperature difference of the chilled (hot) water.
As a preferred scheme, the method for evaluating environmental benefit comprises the following steps: according to the energy saving rate of primary energy of the ground source heat pump air conditioning system relative to a conventional cooling and heating system, the comprehensive evaluation is carried out on the environmental benefit brought by the ground source heat pump system by referring to greenhouse gas generated by primary energy consumption and the amount of polluted primary energy and combining the influence condition of the ground source heat pump system on the local hydrology and geology.
The utility model provides an energy efficiency evaluation device of comprehensive energy system, includes temperature of water tester, water flow tester, humiture tester and power tester, the temperature of water tester is the thermometer, and the thermometer specifically is resistance thermometer, the water flow tester is the ultrasonic flowmeter, the humiture tester is all kinds of air thermometers and air hygrometer, the power tester is power meter, electric power analysis or current voltmeter.
The invention has the beneficial effects that:
1. according to the invention, the environmental benefit can be analyzed by consuming the generated greenhouse gases and the amount of the polluted gases and combining the local hydrogeological conditions, and the local environment can be protected according to the environmental benefit evaluation result while the energy is maximally utilized.
2. According to the invention, the energy-saving benefit evaluation is carried out according to the annual accumulated cold and heat load of the building, the annual energy consumption of the geodesic heat pump system, the annual energy consumption of the conventional heating and cooling modes, and the energy conversion rate can be analyzed and improved according to the energy-saving benefit evaluation result, so that the purpose of energy saving is achieved.
Detailed Description
The invention is further described below with reference to examples.
Example (b):
an energy efficiency evaluation method of an integrated energy system comprises the following steps:
step 1, determining test contents and test conditions;
step 2, testing the test content by using a testing device;
step 3, obtaining a test result from the test device, and evaluating the test result through the evaluation content;
and 4, obtaining the energy efficiency level of the comprehensive energy system according to the evaluation content result.
As a preferable scheme, in the step 1, the evaluation content includes indoor and outdoor environmental parameter tests, a heat pump unit performance test and an electric seasonal heat pump system performance test, and the evaluation content includes heat supply/cold effect evaluation of the heat pump system, performance evaluation of the heat pump system, energy saving benefit evaluation, environmental benefit evaluation and economic benefit evaluation.
In the step 1, the test conditions include the use condition of the ground source heat pump system, the refrigeration and heating test time condition of the ground source heat pump system, the working condition of the ground source heat pump system and the ambient temperature condition.
The cooling and heating test time conditions of the ground source heat pump system are as follows: the refrigerating time of the ground source heat pump system is a typical refrigerating season, the heating time of the ground source heat pump system is a typical heating season, and if the ground source heat pump system is used in winter and summer, tests need to be respectively carried out in the typical refrigerating season and the typical heating season.
The working condition of the ground source heat pump system is as follows: the load factor of the ground source heat pump system during operation exceeds 80% of the rated value of the unit, the energy efficiency ratio of the ground source heat pump system exceeds 95% of the designed energy efficiency ratio, and the total load factor of the ground source heat pump system exceeds 60% of the designed total load factor.
The environment temperature condition is that the outdoor temperature is detected and the outdoor temperature change condition is monitored when the ground source heat pump system is tested.
The method for testing indoor and outdoor environmental parameters comprises the following steps: according to the plane arrangement condition of the building, a part of typical areas and rooms are selected, temperature and humidity measuring instruments are respectively arranged in the typical areas and outdoors, the change conditions of indoor and outdoor temperature and humidity during the test period are monitored, the indoor temperature and humidity detection during the test period is carried out after the building is thermally stable, and the test time is 6 hours.
The heat pump unit performance test method comprises the following steps: the test is carried out according to an experimental method specified in GB/T19409-2003 'water source heat pump unit', the operation working condition of the standby unit is stable, and the test period is 1 hour.
The heat pump system heat/cold supply effect evaluation method comprises the steps of calculating the guarantee rate of indoor temperature according to indoor temperature detection results during a test period; the performance test method of the heat pump unit comprises the following steps:
the heating (cooling) capacity of the heat pump unit is equal to V · ρ · c · Δ twV-flow rate of frozen (hot) water, rho-density of frozen (hot) water, c-specific heat at constant pressure of frozen water, delta twInlet and outlet temperature difference of the chilled (hot) water.
The energy-saving benefit evaluation method comprises the following steps:
s21, calculating the cumulative cold and heat load of the building all the year round;
s22: calculating the annual energy consumption of the geodesic heat pump system;
s23: calculating annual energy consumption of conventional heating and cooling modes;
s24: and (4) calculating the energy saving rate of the primary energy.
The method for evaluating the environmental benefit comprises the following steps: according to the energy saving rate of primary energy of the ground source heat pump air conditioning system relative to a conventional cooling and heating system, the comprehensive evaluation is carried out on the environmental benefit brought by the ground source heat pump system by referring to greenhouse gas generated by primary energy consumption and the amount of polluted primary energy and combining the influence condition of the ground source heat pump system on the local hydrology and geology.
The economic benefit evaluation method comprises the following steps: calculating a static investment recovery period of the project according to the incremental cost of the project and the system energy saving amount obtained by the energy saving benefit evaluation, and evaluating the economic benefit of the project according to the static investment recovery period, wherein the static investment recovery period calculation formula is as follows:
wherein T is the static investment recovery period, K is the incremental cost of the project, and M is the economic benefit brought by the energy conservation of the system.
The utility model provides an energy efficiency evaluation device of comprehensive energy system, includes temperature of water tester, water flow tester, humiture tester and power tester, the temperature of water tester is the thermometer, and the thermometer specifically is resistance thermometer, the water flow tester is the ultrasonic flowmeter, the humiture tester is all kinds of air thermometers and air hygrometer, the power tester is power meter, electric power analysis or current voltmeter.
In this embodiment: the method comprises the steps of determining evaluation content according to needs, determining all designed equipment according to the content to be evaluated, testing and collecting performance parameters of the equipment by using related devices, and on the basis of conventional energy efficiency conversion evaluation, analyzing environmental benefits by consuming the generated greenhouse gases and pollutant gases and combining local hydrogeology with the local hydrogeology, and protecting the local environment according to an environmental benefit evaluation result while maximally utilizing energy. The energy-saving efficiency is evaluated according to the annual accumulated cold and heat load of the building, the annual energy consumption of the geodetic heat pump system, the annual energy consumption of the conventional heating and cooling modes, the energy conversion rate can be analyzed and improved according to the energy-saving efficiency evaluation result, so that the energy-saving purpose is achieved, in addition, the static investment recovery period of the project is calculated according to the system energy-saving energy obtained by the incremental cost and the energy-saving efficiency evaluation, so that the economic efficiency can be evaluated, and the economic investment and the return required by the whole project can be evaluated.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (10)
1. The energy efficiency evaluation method of the comprehensive energy system is characterized by comprising the following steps of:
step 1, determining test contents and test conditions;
step 2, testing the test content by using a testing device;
step 3, obtaining a test result from the test device, and evaluating the test result through the evaluation content;
and 4, obtaining the energy efficiency level of the comprehensive energy system according to the evaluation content result.
2. The method for evaluating the energy efficiency of the integrated energy system according to claim 1, wherein in the step 1, the evaluation contents comprise indoor and outdoor environmental parameter tests, heat pump unit performance tests and electric seasonal heat pump system performance tests, and the evaluation contents comprise heat/cold supply effect evaluation of the heat pump system, heat pump system performance evaluation, energy-saving benefit evaluation, environmental benefit evaluation and economic benefit evaluation.
3. The method according to claim 2, wherein in the step 1, the test conditions include a use condition of the ground source heat pump system, a cooling and heating test time condition of the ground source heat pump system, a working condition of the ground source heat pump system, and an ambient temperature condition.
4. The energy efficiency evaluation method of the integrated energy system according to claim 3, wherein the time conditions of the cooling and heating test of the ground source heat pump system are as follows: the refrigerating time of the ground source heat pump system is a typical refrigerating season, the heating time of the ground source heat pump system is a typical heating season, and if the ground source heat pump system is used in winter and summer, tests need to be respectively carried out in the typical refrigerating season and the typical heating season.
5. The method for evaluating the energy efficiency of the integrated energy system according to claim 3, wherein the working conditions of the ground source heat pump system are as follows: the load factor of the ground source heat pump system during operation exceeds 80% of the rated value of the unit, the energy efficiency ratio of the ground source heat pump system exceeds 95% of the designed energy efficiency ratio, and the total load factor of the ground source heat pump system exceeds 60% of the designed total load factor.
6. The method according to claim 3, wherein the environmental temperature condition is detection of outdoor temperature and monitoring of outdoor temperature variation during testing of the ground source heat pump system.
7. The method for evaluating the energy efficiency of the integrated energy system according to claim 2, wherein the method for testing the indoor and outdoor environmental parameters comprises the following steps: according to the plane arrangement condition of the building, a part of typical areas and rooms are selected, temperature and humidity measuring instruments are respectively arranged in the typical areas and outdoors, the change conditions of indoor and outdoor temperature and humidity during the test period are monitored, the indoor temperature and humidity detection during the test period is carried out after the building is thermally stable, and the test time is 6 hours.
8. The method for evaluating the energy efficiency of the integrated energy system according to claim 2, wherein the method for evaluating the heat/cold supply effect of the heat pump system is characterized in that the guarantee rate of the indoor temperature is calculated according to the detection result of the indoor temperature during the test period; the performance test method of the heat pump unit comprises the following steps：
The heating (cooling) capacity of the heat pump unit is equal to V · ρ · c · Δ twV-flow rate of frozen (hot) water, rho-density of frozen (hot) water, c-specific heat at constant pressure of frozen water, delta twInlet and outlet temperature difference of the chilled (hot) water.
9. The energy efficiency evaluation method of the integrated energy system according to claim 2, wherein the environmental benefit evaluation method comprises the following steps: according to the energy saving rate of primary energy of the ground source heat pump air conditioning system relative to a conventional cooling and heating system, the comprehensive evaluation is carried out on the environmental benefit brought by the ground source heat pump system by referring to greenhouse gas generated by primary energy consumption and the amount of polluted primary energy and combining the influence condition of the ground source heat pump system on the local hydrology and geology.
10. The utility model provides an energy efficiency evaluation device of comprehensive energy system, includes temperature of water tester, water flow tester, humiture tester and power tester, characterized by, the temperature of water tester is the thermometer, and the thermometer specifically is resistance thermometer, the water flow tester is the ultrasonic flowmeter, the humiture tester is all kinds of air thermometers and air hygrometer, the power tester is power meter, electric power analysis or current voltmeter.
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Cited By (1)
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| CN109754195A (en) * | 2019-02-27 | 2019-05-14 | 河南省建筑科学研究院有限公司 | A kind of ground-source heat pump system whole year method for testing performance |
| CN110779076A (en) * | 2019-09-26 | 2020-02-11 | 中国市政工程华北设计研究总院有限公司 | Energy-saving and environment-friendly evaluation method for multi-energy complementary heating system |
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| CN114111108A (en) * | 2021-10-28 | 2022-03-01 | 港华能源投资有限公司 | Method for evaluating energy supply capacity of reclaimed water source heat pump and related device |
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