适用于近零能耗建筑的新型太阳能-污水源热泵系统运行特性

Continuous Operation Analysis of New Solar Sewage Dual-source Heat Pump for Nearly Zero-energy Buildings

本文提出了一种新型太阳能-污水源热泵供暖系统,并研究在长春、乌鲁木齐、西宁、北京及上海5地近零能耗建筑中冬季供暖、全年供生活热水的运行效果与经济性。结果表明:系统在5地的供暖平均温度均达到40℃以上,供生活热水平均温度在电补热前也可以保证在33℃以上,可见本系统运行效果良好但仍需要电补热来保证运行的可靠性;5地冬季系统运行能效均达到3.5以上,节能效果显著;除乌鲁木齐(同其它城市相比燃气价格偏低)外,其它4地在应用本系统时,经济性均高于传统的电热水系统和天然气热水系统。

This paper proposes a new solar sewage dual-source heat pump heating system and explores its application in winter heating in nearly zero-energy buildings in Changchun,Urumqi,Xining,Beijing,and Shanghai.This operation affects the economy of producing domestic hot water throughout the year.The average heating temperature of the system in the five cities is above 40℃and the average temperature of domestic hot water is above 33℃,excluding electric heating.The operation performance reveals that the system is good,but electric heating is still needed to ensure the reliability of the operation.In winter,the energy efficiency of the system in the five cities is more than 3.5,and the energy-saving effect is remarkable.In addition to Urumqi(owing to the low gas price compared to other cities),this system is economically advantageous compared to the traditional electric hot water and natural gas hot water systems.