Research On Key Technology For Clean Heating Of Sewage Source Heat Pump In Severe Cold Region

The development of clean heating in the northern region of China is steadily advancing.New models are becoming more abundant and new technologies are maturing.Among them,the sewage source heat pump system is expected to become one of the efficient and economical heating models in future clean heating.In this paper,economic basis,social background and environmental benefits are fully considered to form a set of program evaluation system suitable for sewage source heat pump system,and according to the particularity of sewage heat source water intake method,the scientific selection standard of sewage water intake method is formulated to promote the efficient application of sewage source heat pump system in cold areas.(1)Compare the applicability,advantages and disadvantages of each evaluation method.Depending on the purpose of the evaluation,a suitable comprehensive evaluation method is selected for the evaluation of the heat source scheme of the sewage source heat pump system and the evaluation of the water intake method.Aiming at the repeated consistency check of the traditional AHP method,the accuracy of the evaluation results is reduced.The pseudo-optimal consistent judgment matrix is used to improve the AHP,and a more concise and accurate index weight calculation method is formed.(2)The evaluation system of heat supply scheme of sewage source heat pump system is established from three aspects: economic benefit,social benefit and environmental benefit.The fuzzy mathematics method and the improved analytic hierarchy process(AHP)method were used to establish the evaluation system of the sewage source heat pump system.A complete evaluation index system is established to comprehensively evaluate the heat source scheme,and the contributions of various factors to energy conservation are analyzed scientifically from the perspective of energy management.(3)The construction cost,the construction difficulty and the influence of water intake on the primary flow are the indexes of different levels in the evaluation system of sewage source heat pump water intake and the evaluation system was applied to the sewage source heat pump heating project of shenfu new district,liaoning province.The analytic hierarchy process is used to calculate the index weight of each layer.The quantified index value is brought into the VIKOR evaluation method.By calculating the distance between each scheme and the positive ideal solution and the negative ideal solution,the most suitable water intake method is obtained by sorting the schemes.(4)TRNSYS simulation software system was used to simulate the sewage source heat pump system of shenfu new district international business center.The evaluation results are combined with the simulation to form a set of evaluation,optimization,simulation of the whole process of project management process.The indoor temperature and indoor thermal comfort satisfaction PMV,PPD Ⅰ level requirement standard of simulation results with the international comparison,verifies the correctness of sewage-source heat pump system for water way of evaluation.Aiming at off-condition operation of the system,the variable condition simulation parameters were selected according to the evaluation results to simulate the influence degree of each factor on the energy consumption of the system,so as to provide a theoretical basis for the optimal operation of the sewage source heat pump.