| 主权项 |
1. Method for working fluid compression for heat transfer from a lower to a higher temperature heat sink using a heat compression absorption pump where the working fluid is a solution of substances in a liquid solvent which is partially vaporized and then condensed and the absorption solution concentration changes by absorption solution temperature lowering so as part of the absorbent is separated, characterized by the fact that the absorbent separation from the absorber leaving solution, takes place without energy consumption, the heat rejection from the concentration lowering solution is fully recovered, the absorber solution is concentrated and at high absorbent concentration. The method works effectively at high, at a range of 1/10 or higher, absorber/generator concentration ratio and activities ratio. Temperature lift may be high, in the range of 150-200° C. The method works between two pressure levels offering a high compression ratio. After absorbent separation, the solution is expanded, offering heat absorption from any lower than the ambient temperature and then steam and remaining liquid solution is compressed at high pressure.
A liquid solution concentrated in dissolved substances like electrolytes, is being cooled to a lower temperature (FIG. 1, point 1 to 2) so that its concentration changes and a different phase, like crystals, are formed, separated from the solution and stored in a container (K1). The resulting low concentration solution is expanded so as it is partially vaporized at the desired refrigeration temperature (E). The produced steam is heated through a heat exchanger (HE), compressed to the absorber pressure and enters absorber (A1). An additional amount of different phase may be separated during vaporization (K2) and driven to container (K1). The remaining solution is compressed and heated through the heat exchanger (HE) recovering heat from the solution leaving the absorber and enters absorber (A1). The same happens to the separated phase. Now the initial, high concentration solution has been reformed. Heat is rejected from the absorber. The initial solution may be created at two separated equipments, both at high temperature. The steam is absorbed by a portion of the separated substance and the rest of this substance is dissolved in the poor solution. The solution from the absorber is compressed and mixes with the returning from the evaporator solution to create the initial solution. Alternatively, part of the separated phase may enter the low concentration solution moving from the evaporator to absorber so that its concentration increases gradually. The solution that leaves absorber maybe cooled at a much lower than environment temperature by expansion to a convenient pressure. The steam is driven to the container (K1) or to the solution, the additional separated phase enters (K1) while the solution recovers heat from the cooling solution, compressed and expanded to the desired refrigeration temperature (E). A higher concentration difference between evaporator and absorber solutions is achieved in this way. Water is the most common solvent. Many other solvents can be used too. Methanol, monomethylamine, dimethilsulfoxide, DMF, acetonitrile, formamide, formic acid, are convenient too. Many electrolytes like CoI2, Pb(NO3)2, TICl, RbNO3, TINO3, ZnCl2, SbCl2, SbF2, (Cl, Br, I, SO4) with(K, Na, NH4, Li, . . . ) can also combined with any solvent. |
