整体式水-空气热泵具有出色的空气和水加热能力。然而，直到最近，当冷凝液（空气或水）温度相等时，实际冷却效率比类似的高效空气-空气热泵低15%到25%。尽管由于水温更适中，传统水-空气热泵系统的冷却效率与实际的空气-空气系统效率相当，但更好的性能是可能的，也是必要的。在南方气候条件下尤其如此，以证明更高的首件成本和显著的冷却节能和峰值需求减少是合理的。介绍了几种性能改进的可能性和单元式水-空气热泵。两个2.5吨（8吨）的设计参数。 介绍了8千瓦的热泵。其中一个单元是带有热水减温器的标准设计。第二台机组与之类似，但增加了全冷凝水加热能力。往复式压缩机的设计冷却效率预计为14.0至15.0 Btu/Wh（COP=4.1至4.4）。季节效率应提高15%。使用涡旋压缩机和改进的室内风扇电机，可以额外提高10%。随附的一篇论文报告了作为整个项目一部分建造的两台往复式压缩机样机的性能测试结果。关键词:设计，水-空气热泵，冷却，效率，土壤热泵，单元热泵，性能，中冷器，计算，往复式压缩机，测试，原型，热泵。 引文:研讨会，ASHRAE交易，第97卷，Pt。1991年，纽约

Unitary water-to-air heat pumps have outstanding air- and water-heating capabilities. However, until recently actual cooling efficiencies were 15% to 25% lower than comparable high-efficiency air-to-air heat pumps when condenser fluid (air or water) temperatures are equal. Although the cooling efficiencies of conventional water-to-air heat pump systems are equivalent to actual air-to-air system efficiencies because of more moderate water temperatures, better performance is both possible and necessary. This is especially true in southern climates in order to justify higher first costs with significant cooling energy savings and peak-demand reductions. Presents several performance improvement possibilities and unitary water-to-air heat pumps. The design parameters of two 2.5-ton (8.8-kW) heat pumps are presented. One unit is a standard design with a hot water desuperheater. The second unit is similar, but full condensing water heating capability is added. Design cooling efficiencies in the 14.0 to 15.0 Btu/Wh (COP = 4.1 to 4.4) range are predicted with reciprocating compressors. Seasonal efficiencies should be 15% higher. An additional 10% improvement is possible with scroll compressors and improved indoor fan motors. An accompanying paper reports on the performance testing results of the two prototypes with reciprocating compressors that were built as part of the overall project.KEYWORDS: designing, water air heat pumps, cooling, efficiency, soil heat pumps, unit heat pumps, performance, intercoolers, calculating, reciprocating compressors, testing, prototypes, heat pumps.