| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition which relaxes a crystallization line without reducing the water-vapor absorption performance by adding calcium nitrate to an aqueous solution composition for an absorption type heat pump which includes lithium bromide as its absorbent component and uses water as its coolant. SOLUTION: Calcium nitrate is preferably added to lithium bromide in a mol ratio of 0.1-0.5 (mol of calcium nitrate when the total mol of lithium bromide and calcium is 1). At 275 K of crystallization temperature, for example, in LiBr aqueous solution, crystallization occurs at the concentration of 61%. When 0.2 mol of Ca(NO3)2 is added to 0.8 mol of LiBr, however, crystallization does not occur up to the high concentration of 71%. If the system contains LiBr as the main component, this inversion also can be applied to absorbents of LiBr-LiI system, LiBr-LiCl system and LiBr-LiI-LiCl system.
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