This study presents the numerical development of a generator–rectifier combined component (called a “combined-generator”) composed of plate heat exchangers, designed and meant to be integrated in a single-stage ammonia–water absorption cooling system. Investigations are made to find the most compact and efficient design. Numerical simulations are presented describing parameters such as the ammonia fraction in the vapor produced and the combined generator efficiency as a function of the inlet temperatures or mass flow rate of the heat transfer fluid. The combined generator produces vapor with a high ammonia mass fraction and high mass efficiency for a solution inlet temperature range of [315–320 K] and a mass flow rate of the heat transfer fluid between [0.4 and 0.6 kg.s⁻¹]. The impacts of the length and number of plates as well as the adiabatic/heated ratio of the plates are also examined. The ammonia fraction increases with the increase in the adiabatic/heated ratio, and the combined generator efficiency increases with the increase in the plate aspect ratio of length/width. The proposed system is developed to be operated in compact and medium-capacity absorption chillers (approximately 5 kW cold) for air-conditioning.

本研究介绍了由板式换热器组成的发电机 - 整流器组合组件（称为“组合发电机”）的数值开发，旨在集成在单级氨水吸收冷却系统中。进行调查以找到最紧凑和最有效的设计。提供了数值模拟来描述参数，例如所产生的蒸汽中的氨分数和作为传热流体的入口温度或质量流量的函数的组合发电机效率。对于溶液入口温度范围 [315–320 K] 和传热流体的质量流量在 [0.4 和 0.6 kg.s ^-1之间，组合发生器产生具有高氨质量分数和高质量效率的蒸汽]。还检查了板的长度和数量以及板的绝热/加热比的影响。氨分数随着绝热/加热比的增加而增加，并且发电机组合效率随着板的长/宽纵横比的增加而增加。所提议的系统被开发用于在用于空调的紧凑型和中等容量吸收式制冷机（约 5 kW 冷）中运行。