Research On Simplified Method Of Annual Performance Testing Of Ground Source Heat Pump System Based On Typical Test Conditions

With the rapid development of China's economy,building energy consumpt ion is also growing rapidly.As an energy-efficient HVAC technology,ground s ource heat pump has been greatly developed in China.The promotion and appl ication of ground source heat pump air conditioning technology is an effective measure to solve the problem of energy consumption in HVAC system operatio n.At present,to what extent the ground source heat pump system can save en ergy,how to calculate the energy savings and how to evaluate the energy savi ng performance reasonably,and the lack of correct and systematic evaluation i ndicators and method system,make the further promotion of GSHP have encou nter major problems.At present,Henan Province has not yet developed the province's ground s ource heat pump energy efficiency evaluation standards.Which consumes a lot of manpower,material resources and financial resources to monitor some proj ects without long-term monitoring system,it is time-consuming and there are many uncertain factors that are difficult to a long time implement.Therefore,i n view of the situation in Henan Province,it is very necessary to find a meth od for energy efficiency evaluation of ground source heat pump suitable for th e province's rapid energy efficiency evaluation,and it can be used in practical projects.Based on the research on the energy efficiency evaluation method of existi ng ground source heat pump,this paper proposes a simplified method for annu al performance detection of ground source heat pump system that requires only several measurements.The basic idea is to first determine the typical test conditions based on th e outdoor temperature.According to the combination of actual measurement an d calculation,determine the cumulative heating capacity and cooling capacity o f the building throughout the year,and determine the heating by weighting the average energy efficiency of the test condition system.The energy efficiency r atio of the system in the season and the energy efficiency ratio of the system in the cooling season are calculated,and the power consumption of the heating season system and the power consumption of the cooling season system are c alculated,and the annual comprehensive energy efficiency ratio of the ground source heat pump system is finally obtained.In order to verify whether the method is reasonable or not,firstly,three t ypical public buildings such as shopping malls,offices and hotels in Zhengzho u City are selected for research.Based on the relevant load and power consum ption data obtained through energy consumption simulation,the representative t emperature of different temperature intervals is selected as the test condition,a nd the simulation data under the defined working conditions is obtained,and t he calculated data is compared with the data directly obtained by the simulatio n.The energy efficiency ratio calculated by the method is analyzed and the de viation of the system energy consumption from the simulation is about 10%,w hich verifies the rationality of the simplified method.In order to test whether the method is applicable in other areas of Henan Province,further research on ground source heat pump application buildings i n five other representative cities of Anyang,Sanmenxia,Shangqiu,Zhumad ian,Xinyang,etc.in Henan Province;through calculation of data and simulatio n The directly obtained data were compared,and the deviation between the tw o was within 15%,indicating that the simplified method can be applied in mo st areas of Henan Province.In order to verify the effectiveness of the simplified method in the actual system,a ground source heat pump project is selected for actual measurement,and the measured data is calculated by the above method,and compared with the original monitoring data calculation result,the system energy efficiency rat io deviation between the two is 10%.Within the mean,the method is effective in practice.Based on the consideration of the climate characteristics of different cities,this paper proposes a simplified annual energy efficiency detection method for ground source heat pump system,and tests its rationality and regional applica bility in Henan Province through simulation calculation and example calculation.It provides basic data and technical support for the energy efficiency evaluatio n of the ground source heat pump application project in Henan Province and t he preparation of relevant standards for energy efficiency evaluation of ground source heat pump in Henan Province.