Two Absorption Heat Transformer Is A Comparative Study

There is a great amount of waste heat in industry, especially in petrol industry, most of which could be used again. In practice, it is output into the environment directly. This not only does harm to the environment by heat pollution, but also waste the heat. So to recover the heat is very important, especially for China, a country lack of energy.According to the fact as described above, three cycles of two-staged AHT are studied. The mathematic models of them are founded and computed with the new working pairs TFE/TEGDME. The effects of heat source temperature, temperature drop of heat source in systems, output temperature, temperature of cooling water, concentration range of cycle on the quantity and quality of recovered heat are analyzed in the paper.The results show that in the three cycles, in the concerned range of parameters, COP of the high-low cycle ranges between 0.32 and 0.34, COE ranges between 0. 53 and 0. 6. And COP of the parallel cycle ranges between 0. 29 and 0. 32, COE ranges between 0. 48 and 0. 53. As to the low-high cycle, its COP and temperature lift conflict with each other sharply. When temperature lift reaches 60癈, its COP is as low as 0. 1. And when COP reaches 0.3, temperature life is as low as 30 or 40.From the view of thermodynamics, conclusions can be drawn that the high-low cycle is good to be used to recover waste heat, the parallel cycle is not relatively, and the low-high cycle is not at all.