Topic: Thermally Driven Heat Pumps

Thermally driven heat pumps represent technology not only for recovering thermal energy but also for supplying it to processes after upgrading the quality of recovered heat. The pumps are classified into three types: absorption, adsorption, and chemical reaction types. The absorption and adsorption heat pumps have already been commercialized to generate cooling energy for air conditioning by recovering thermal energy at temperatures below 363 K and around 453 K. Reducing the initial apparatus cost and finding a suitable market for each heat pump system are important for promoting their introduction into the market. These pumps are expected to save energy and improve total energy efficiency of heat utilization systems by recovering and upgrading thermal energy discharged from various processes.