以LFG为燃料的空气源沼气机热泵供热性能

发布时间：2018-06-02 21:45

  本文选题：再生能源 + 热力学过程　； 参考：《化工学报》2016年S2期

【摘要】：为了利用垃圾填埋气(LFG)这种可再生能源,减少化石燃料的消耗,提出一种以LFG为燃料的空气源沼气机热泵供热系统,并研究其供热性能。确定了LFG收集系统以及适合沼气机热泵系统的LFG净化方法。所构建的实验平台可经阀门切换,分别研究沼气机排烟余热单独回收利用或缸套冷却水和排烟余热同时回收利用两种模式。进行了系统供热性能的实验测试,并对影响系统供热性能的沼气机转速、冷凝器水流量、冷凝器进水温度等因素进行了分析。实验结果表明:该热泵系统的总供热量随沼气机转速和冷凝器水流量增大而增大,随冷凝器进水温度升高而减小。系统制热系数(COP)和一次能源利用率(PER)均随冷凝器进水温度升高而减小,但其与冷凝器水流量的关系并非单调变化关系。当冷凝器水流量为1.45~1.65kg·s-1时,系统供热性能最好;当冷凝器进水温度为35~45℃时,系统的COP最高可达到4.3,PER最高可达到1.48。
[Abstract]:In order to use landfill gas (LFG) as a renewable energy and reduce the consumption of fossil fuels, an air-source biogas heat pump heating system based on LFG is proposed and its heating performance is studied. LFG collection system and LFG purification method suitable for biogas engine heat pump system were determined. The experimental platform can be switched by valve to study two models of recovery and utilization of exhaust heat of biogas engine or cylinder liner cooling water and exhaust heat simultaneously. The experimental test of the heating performance of the system was carried out, and the factors affecting the heating performance of the system, such as the rotational speed of the biogas machine, the water flow rate of the condenser and the inlet temperature of the condenser, were analyzed. The experimental results show that the total heat supply of the heat pump system increases with the increase of the biogas engine speed and the condenser water flow, and decreases with the increase of the inlet temperature of the condenser. Both COP and PERs decrease with the increase of inlet water temperature, but the relationship between COP and water flow is not monotonous. When the water flow rate of the condenser is 1.45~1.65kg s-1, the heating performance of the system is the best, and when the inlet water temperature of the condenser is 35 ~ 45 鈩，

本文编号：1970308