温室大棚多热源热泵供暖系统的研究

STUDY ON HEATING SYSTEM WITH MULTI-SOURCE HEAT PUMP FOR GREENHOUSE

针对传统温室大棚供暖方式的不足,为充分和高效的将可再生能源用于温室供暖,设计建立温室大棚多热源热泵供暖系统的实验装置。该文通过实验对多热源热泵供暖系统的性能及供暖效果进行分析。实验表明系统在不同天气工况下运行稳定且供暖效果明显,温室土壤温度日平均提升1~2℃,室内空气温度日平均提升2~5℃。该文同时在节能和经济效益方面对系统进行评估,多热源热泵系统的综合性能系数COP值在5~6之间,明显优于其他形式的热泵系统;通过对比不同的温室供暖方式,相比常规能源(油、气、电),多热源热泵系统运行费用节省73%以上。

To fully and efficiently use renewable energy for greenhouse heating because of the shortages of the traditional heating methods for greenhouse,a set of experimental device of heating system with multi-source heat pump for greenhouse was designed and developed. In this study,the performances and heating effects of the heating system with multi-source heat pump were analyzed through these experiments. The results show that the system operates stably under different weather conditions and the heating effects is remarkable. The daily average temperatures of greenhouse soil elevated 1-2 ℃ while the indoor air daily cweraye is evelated temperature increased by 2-5 ℃ in average per day.Besides,the energy saving and economic benefits of the system were also evaluated in this study. It’s indicated that the comprehensive performance coefficient,namely COP value,is between 5 and 6,which is obviously better than that of other forms of heat pump system. Compared to conventional energy(like oil,gas,electricity),the operating cost of the system with multi-source heat pump is saved more than 73%.