在蒸汽压缩冷却器（VC）中，在冷凝器出口处对制冷剂进行过冷可以提高VC的性能系数（COP），因为进入蒸发器的制冷剂质量较低，蒸发器可以吸收更多热量。过冷制冷剂的一种方法是使用冷流，通过冷凝器和VC中膨胀阀之间的热交换器排出制冷剂的热量。冷流可以是来自制冷机（如VC）或吸收式制冷机的冷冻水。本文研究了蒸汽压缩式制冷机和吸收式热泵集成系统（VAIS）因制冷剂过冷而产生的COP改善。 VAIS通过添加一个称为过冷器的热交换器，将电动VC和吸收式热泵（AHP）结合起来。过冷器位于冷凝器和VC膨胀阀之间，它使用来自热驱动AHP的冷冻水对VC的制冷剂进行过冷。此外，AHP还可以提供50°C左右的热水，可用于家庭热水、游泳池或具有额外热量输入的空间供暖。AHP的热资源将是天然气、废热或太阳能，这可以减少所需的一次能源，并提高冷却和加热设备的效率。开发了VAIS的热力学和传热模型来预测系统性能。 这些模型基于普渡大学正在安装的一个试验台。开发的这些模型能够预测集成系统的工作条件，包括温度、压力、流量、焓、能量等。根据模型预测的结果，VAIS可将试验台VC的COP提高13-28%。发现COP的改善实际上受到运行条件的影响。此外，VAIS生产的热水显示了该技术的额外优势。引用:ASHRAE论文CD:2014 ASHRAE冬季会议，纽约

Subcooling the refrigerant at the exit of the condenser in a vapor-compression chiller (VC) can improve the coefficient of performance (COP) of the VC because the refrigerant entering the evaporator has a lower quality and more heat can be absorbed in the evaporator. One way to subcool the refrigerant is to use a cold stream to remove the heat of the refrigerant through a heat exchanger placed between the condenser and the expansion valve in the VC. The cold stream could be the chilled water from a chiller like VC or an absorption chiller. The effort in this paper has investigated the COP improvement of a Vapor-compression chiller and Absorption heat pump Integrated System (VAIS) due to the subcooling the refrigerant. The VAIS combines an electricity-driven VC and an absorption heat pump (AHP) by adding a heat exchanger, called a subcooler. The subcooler is placed between the condenser and the expansion valve of the VC and it uses the chilled water from a thermal driven AHP to subcool the refrigerant of the VC.Additionally, the AHP can also provide hot water at around 50°C, which can be used for domestic hot water, swimming pool or space heating with additional heat inputs. The thermal resource of the AHP will be natural gas, waste heat, or solar energy, which can reduce the required primary energy and improve the efficiency of the cooling and heating equipment.Thermodynamic and heat transfer models of the VAIS were developed to predict the system performances. The models are based on a test bed being installed at Purdue University. These models developed are able to predict the working conditions of the integrated system including temperatures, pressures, flow rate, enthalpy, energy, and others. Based on the results predicted by the models, the VAIS can improve the COP of the VC in the test bed by 13-28%. It was found the COP improvement actually affected by operation conditions. Additionally, the hot water produced by the VAIS shows additional strength of the technology.