A novel type of coupling cycle for adsorption heat pumps

This paper presents an adsorption heat pump system using a new coupling cycle. Experiment results and analysis show that the COP of the binary coupling cycle is higher than that of pure water–zeolite system. The system operating pressure is found to be near ambient pressure when proper concentration of ammonia is used in the system. The leakage to the system is reduced achieving long life and allowing the vessels of the system to be signed light in weight. The feasibility and reliability of the adsorption heat pump would be greatly improved by the use of the new binary adsorption cycle, providing essential benefits for industrialization.