【摘要】 针对北方寒冷地区的稠油热水驱技术面对的问题，设计一台带经济器的螺杆式低温空气源热泵加热原油机组，增加油冷热回收系统，测试分析低温环境下热泵系统的制热性能以及油冷热回收对系统性能的影响。结果表明：油冷换热器可以有效帮助螺杆式空气源热泵降低压缩机排气温度，提高热泵在低温环境下的制热量和能效比C_op,实现环境温度-35—43℃的稳定运行。有油冷热回收时，系统能效比最高可达3.74,油冷换热器最高能回收25.8%的热量。蒸发温度-24℃时，制热量可达350 kW。喷油量的增加对系统性能的改善呈现先增加后下降的趋势，油冷热回收回路存在最佳喷油量使得系统能效比最高。随着喷油温度的增加，压缩机排气温度呈上升趋势，系统能效比呈下降趋势。更多还原

【Abstract】 Aiming at the problems of heavy oil hot water drive technology in cold regions of northern China, a screw-type low-temperature air source heat pump heating unit with an economizer was designed, and an oil cooling and heat recovery system was implemented. The heating performance of the heat pump system and the impact of oil cooling and heat recovery on the system performance were tested and analyzed. The results show that the oil cooler effectively helps reduce the compressor exhaust temperature of the screw-type air source heat pump. The oil cooler also can help improve the heating capacity and C_op of the heat pump in low temperature environment. And the system can achieve stable operation within a temperature range of-35-43 ℃. With the oil recovery system, the maximum C_op can reach 3.74, and the oil cooler is able to recover up to 25.8% of the heat. And the heating capacity can reach 350 kW at an evaporation temperature of-24 ℃. With the increase of oil injection, the improvement in system performance increases first and then decreases. There exists an optimal oil injection rate in the oil cooling and heat recovery circuit, which maximizes system efficiency. With the increase of oil injection temperature, the compressor exhaust temperature increases, and the system efficiency ratio decreases.更多还原