Comprehensive Evaluation Index System Of Air Source Heat Pump Hot Water System

Building operation total commodity energy consumption in China accounts for about 20%of the total primary energy consumption.Hot water energy consumption is another major energy consumer after heating energy consumption,air conditioning energy consumption and lighting energy consumption,and with the quality of people's lives,the demand for domestic hot water is on the rise.In this context,the air source heat pump water heater(ASHP)has developed rapidly with its advantages of high efficiency,energy saving and environmental protection.It has become the fourth generation of new water heater of relay water heater,gas water heater and solar water heater.In order to ensure the reasonable application and development of the technology,the evaluation of the technical,economic and environmental benefits of the air source heat pump water heating system becomes the necessary basis for its stable development.This paper reviews the research status of the evaluation of air source heat pump water heating system at home and abroad,combined with the needs and problems in practical engineering,on the basis of this,puts forward a comprehensive evaluation index system of air source heat pump water heating system which can comprehensively consider the technical,economic and environmental characteristics.The evaluation index system contains a total of 1 0 secondary indicators.Using group analytic hierarchy process to synthesize 20 expert opinions to determine the weight of each index,combined with domestic and international evaluation standards and actual engineering,the scoring standards for each index have been formulated.The scoring algorithm of each secondary index is determined by the distribution function method in fuzzy comprehensive evaluation method.Based on the TRNSYS dynamic simulation platform,the annual operation of an office building domestic hot water system in Guangzhou was simulated,and calculating the index value of each secondary indicator based on the simulation result.Applying the evaluation index scoring standards and algorithms established in this paper to evaluate and analyze the actual case,the score is 85.57 and the evaluation level is "good".At the same time,the air source heat pump hot water system was evaluated by using the grading scale method to integrate 200 experts' opinions,the score is 87.65.The error of the score obtained by the distribution function method and the hierarchical weight method is 2.43%,which can verify the rationality of the evaluation index system and the scoring standard established in this paper.In order to simplify the work of the evaluator,this paper uses Sublime Text code editor develop a comprehensive evaluation system for the air source heat pump water heating system by html,CSS and JavaScript,the results of the comprehensive evaluation can be obtained through the weights of input indicators,scoring criteria and indicators.This study fills in the blank of the comprehensive evaluation system of air source heat pump water heating system,and provides a basis for the development of relevant evaluation standards in China.