严寒地区太阳能-空气源热泵供暖系统优化运行试验研究

Experimental Study on Optimal Operation About Solar Energy Assisted Air Source Heat Pump Heating System in Severe Cold Area

为减少严寒地区采暖期对常规能源的消耗,实现节能减排,设计了一种太阳能-空气源热泵联合供暖系统,并对其在严寒气象条件下的运行模式进行了分析,以提高系统运行效率、节约能源为原则,对系统的运行模式进行了优化,提出了时间控制的运行模式。并结合实际工程进行了供暖测试研究,对比分析了优化前后太阳能-空气源热泵联合供暖系统的运行情况。试验结果表明:在严寒条件下,室外平均温度低于-20℃时,合理优化系统的运行模式,可大幅提高系统的效率;时间控制模式下太阳能-空气源供暖系统一天内室温波动范围为3.95℃,室内平均温度为19.45℃,该系统完全能够满足居民热舒适性要求;在室外气象条件最不利的情况下,该系统较传统的燃煤锅炉供暖系统平均每天节约电能5.37 kWh.

In order to reduce the consumption of conventional energy and realize energy conservation and emission reduction during the heating period in severe cold area, a solar energy assisted air source heating system was designed and its operating mode under severe cold weather conditions was analyzed. Energy conservation and improvement of the system operation efficiency are principles.The operating mode of the system is optimized, and a time-controlled operating mode is proposed.Combined with the actual project, the heating test was studied and the operation of the solar energy assisted air source heating system was compared and analyzed by latter optimization with former one. The results showed that a reasonable optimization of the operating mode of the system can greatly increase the efficiency of the system under severe cold conditions where the outdoor average temperature is lower than-20℃;under the time-controlled mode, the room-temperature fluctuation range of the system within a day is 3.95℃. At average temperature of 19.45℃, the system is fully capable of meeting residents’ thermal comfort requirements. Under the most unfavorable outdoor weather conditions, the system saves an average of 5.37 kWh of electricity per day compared to a conventional coal-fired boiler heating system.