A standalone, compact, thermally driven ammonia-water absorption chiller designed to deliver a cooling capacity of 10.5 kW at ambient temperatures greater than 40 °C is presented. Heat and mass exchangers with novel microscale features and geometries are employed to minimize the physical size of the system. A diabatic distillation column based desorber and a shell-and-tube absorber with microscale features are used. Thermodynamic cycle modeling and heat and mass exchanger design methodologies are discussed. The performance of the packaged unit chiller is demonstrated experimentally over a wide range of operating conditions. The system delivered 10.6 kW of cooling at a COP of 0.63 at design conditions in a compact 0.7 m x 0.9 m x 1.0 m envelope. This work validates the scalability of microchannel heat exchanger technology from a proof-of-concept laboratory scale device to a residential-scale absorption heat pump.

介绍了一种独立的紧凑型热驱动氨水吸收式制冷机，该制冷机设计用于在高于40°C的环境温度下提供10.5 kW的冷却能力。具有新颖的微尺度特征和几何形状的热交换和质量交换器用于最小化系统的物理尺寸。使用了基于非绝热蒸馏塔的解吸器和具有微米级特征的管壳式吸收器。讨论了热力学循环建模和热质交换器的设计方法。成套设备冷却器的性能在广泛的运行条件下进行了实验验证。该系统在设计条件下以0.7m x 0.9m x 1.0m的紧凑型外壳提供了10.6 kW的冷却，COP为0.63。