ABSORPTION HEAT PUMP AND SORBENT FOR AN ABSORPTION HEAT PUMP COMPRISING METHANESULFONIC ACID

Abstract

The invention relates to the use of methanesulphonic acid as sorption medium in an absorption heat pump; a sorption medium for an absorption heat pump which comprises methanesulphonic acid and an ionic liquid; and an absorption heat pump having an absorber, a desorber, a condenser, an evaporator and a working medium comprising a volatile refrigerant and a sorption medium, wherein the sorption medium comprises methanesulphonic acid.

Claims

1: Absorption heat pump comprising an absorber, a desorber, a condenser, an evaporator and a working medium comprising a volatile refrigerant and a sorption medium, characterized in that the sorption medium comprises methanesulphonic acid.

2: Absorption heat pump according to claim 1, characterized in that it is an absorption refrigeration machine and in the evaporator takes up heat from a medium to be cooled.

3: Absorption heat pump according to claim 1, characterized in that it comprises water as refrigerant.

4: Sorption medium for an absorption heat pump, characterized in that it comprises methanesulphonic acid and an ionic liquid.

5: Sorption medium according to claim 4, characterized in that the weight ratio of methanesulphonic acid to ionic liquids is in the range from 9:1 to 1:4.

6: Sorption medium according to claim 4, characterized in that the weight ratio of methanesulphonic acid to ionic liquids is in the range from 1:4 to 1:100.

7: Sorption medium according to claim 4, characterized in that it comprises a 1,3-dialkylimidazolium salt as ionic liquid.

8: Sorption medium according to claim 7, characterized in that the 1,3-dialkylimidazolium salt is selected from among 1,3-dimethylimidazolium methanesulphonate, 1-ethyl-3-methylimidazolium methanesulphonate and 1,3-diethylimidazolium methanesulphonate.

9: Absorption heat pump according to claim 1, characterized in that it comprises a sorption medium comprising methanesulphonic acid and an ionic liquid.

10: Use of methanesulphonic acid as sorption medium in an absorption heat pump.

11: Use according to claim 10, characterized in that the absorption heat pump is an absorption refrigeration machine and in the evaporator heat is taken up from a medium to be cooled.

12: Use according to claim 10, characterized in that methanesulphonic acid is used in the form of a sorption medium comprising methanesulphonic acid and an ionic liquid.

Description

EXAMPLES

Examples 1 to 5

[0036] The vapour pressure of working media containing 15% by weight of water as refrigerant and 85% by weight of a sorption medium composed of methanesulphonic acid (MeSO.sub.3H) and 1,3-dimethylimidazolium methanesulphonate (MMIM MeSO.sub.3) was determined at 35 C. and 80 C. The proportions by weight of methanesulphonic acid and 1,3-dimethylimidazolium methanesulphonate examined and the results obtained are shown in Table 1.

TABLE-US-00001 TABLE 1 Vapour pressure of working media composed of 15% by weight of water and 85% by weight of sorption medium Proportions by Vapour Vapour weight in the pressure at pressure at Example sorption medium 35 C. in mbar 80 C. in mbar 1 100% MeSO.sub.3H 1.3 10.5 2 58% MeSO.sub.3H + 6.8 100 42% MMIM MeSO.sub.3 3 50% MeSO.sub.3H + 9.2 115 50% MMIM MeSO.sub.3 4 20% MeSO.sub.3H + 12.1 136 80% MMIM MeSO.sub.3 5 *100% MMIM MeSO.sub.3 12.8 129 *not according to the invention