摘要
建立了滚动转子式压缩机热力学稳态仿真模型,在相同理论容积输气量的条件下,分析了吸气过热度、蒸发温度、冷凝温度对以R22、R32和R290为制冷工质的滚动转子式压缩机热力性能的影响规律。对比研究表明:在相同工况下,R22的性能系数COP最大但与R32接近,R290的COP最小;若压缩机高低压比降低,COP增加明显;当仅增加吸气过热度时,R32、R22的COP变化很小,而R290的COP增加较为明显,并逐渐接近R32和R22;吸气过热度仅对排气温度有较大影响,而对质量流量、功率、制冷量、COP的影响很小,蒸发温度、冷凝温度对热力性能的影响更显著。
Thermodynamic steady simulation model of rotary compressor was established. Under the condition of the same theoretical volumetric displacement, the effect of suction gas superheat, evaporating temperature and condensing temperature on the thermal performance of rotary compressor based on refrigerants R22, R32 and R290 were analyzed. Contrast study results show that COP of R22 is the largest, COP of R290 is the least. If high - low pressure ratio of compressor decreases, COP increases. With suction gas superheat only increasing, COPs of R22 and R32 change little, however COP of R290 increases obviously and gradually is close to COPs of R22 and R32. The effect of suction gas superheat is great on discharge temperature but little on the mass flow rate, power, refrigerating capacity and COPs. The effects of evaporating temperature and condensing temperature on the thermodynamic performance are greater.
出处
《低温与超导》
CAS
北大核心
2018年第2期75-80,共6页
Cryogenics and Superconductivity
