Chemical heat pump working according to the absorption or adsorption principle

Abstract

A chemical heat pump working according to the absorption or adsorption principle comprises an active substance and a volatile liquid, wherein the volatile liquid is adapted to be absorbed or be adsorbed by the active substance at a first temperature and be desorbed by the active substance at a second higher temperature, wherein the chemical heat pump further comprises at least a first tube and at least a second tube, wherein the second tube is at least partially positioned within the first tube and essentially along at least a part of the longitudinal axis of said first tube, wherein the active substance is applied at least partially in a space between the inside of the first tube and the outside of the first tube, wherein a first matrix adapted for storage of the volatile liquid is at least partially applied on the outside of the second tube.

1 . A chemical heat pump working according to the absorption or adsorption principle comprising an active substance and a volatile liquid, wherein the volatile liquid is adapted to be absorbed or be adsorbed by the active substance at a first temperature and be desorbed by the active substance at a second higher temperature, wherein the chemical heat pump further comprises at least a first tube and at least a second tube, wherein the second tube is at least partially positioned within the first tube and essentially along at least a part of the longitudinal axis of said first tube, wherein the active substance is applied at least partially in a space between the inside of the first tube and the outside of the second tube, wherein a first matrix adapted for storage of the volatile liquid is at least partially applied on the outside of the second tube. 
     
     
         2 . The chemical head pump according to  claim 1 , wherein the active substance is at least partially positioned on the inside of the first tube and wherein the active substance is kept fixed to the inside of said first tube with a first layer, permeable to the volatile liquid in gas phase. 
     
     
         3 . The chemical heat pump according to  claim 1 , wherein said first matrix is fixed to the outside of the second tube with a second layer which is permeable to the volatile liquid in gas phase. 
     
     
         4 . The chemical heat pump according to  claim 1 , wherein at least one third layer is positioned between the inside of the first tube and the outside of the second tube so that gas can pass from the first tube to the second tube wherein the third layer is adapted to reflect thermal radiation. 
     
     
         5 . The chemical heat pump according to  claim 4 , wherein the third layer
 comprises a ceramic material coated with a metal.   
     
     
         6 . The chemical heat pump according to  claim 5 , wherein the ceramic material is glass. 
     
     
         7 . The chemical heat pump according to  claim 5 , where the metal is copper. 
     
     
         8 . The chemical heat pump according to  claim 5 , where the metal forms a layer wherein the thickness of said layer is less than 100 Å. 
     
     
         9 . The chemical heat pump according to  claim 6 , where the third layer exhibits a reflectance of thermal radiation in the range 350-550 K of at least 80%, preferably at least 90%. 
     
     
         10 . The chemical heat pump according to  claim 1 , wherein at least a fourth heat conductive layer is arranged between the inside of the first tube and the active substance. 
     
     
         11 . The chemical heat pump according to  claim 10 , wherein the fourth heat conductive layer comprises at least one metal. 
     
     
         12 . The chemical heat pump according to  claim 10 , where the fourth heat conductive layer comprises copper. 
     
     
         13 . The chemical heat pump according to  claim 1 , wherein further a second matrix is positioned at least partially on the inside of the first tube, whereby the second matrix is adapted to store the active substance. 
     
     
         14 . The chemical heat pump according to  claim 1 , wherein the active substance at the first temperature has a solid state, from which the active substance at uptake of the volatile liquid and its gas phase immediately transforms partially into liquid state or solution phase and at the second temperature has a liquid state or is present in solution phase, from which the active substance by desorbing the volatile liquid, in particular its gas phase, immediately transforms partially to solid state. 
     
     
         15 . The chemical heat pump according to  claim 1 , wherein an energy transfer device is in thermal contact with the first tube, wherein the energy transfer device comprises at least one tube with a first and a second end, the first end being situated lower than the other end and wherein the energy transfer device comprises a liquid. 
     
     
         16 . The chemical heat pump according to  claim 15 , wherein the heat conductivity of said energy transfer device can be regulated. 
     
     
         17 . The chemical heat pump according to  claim 1 , wherein the tube is adapted to be heated by an energy source. 
     
     
         18 . The chemical heat pump according to  claim 1 , wherein the tube is adapted to be heated by solar energy. 
     
     
         19 . The chemical heat pump according to  claim 1 , wherein the tube is in thermal contact with the cooling system of a combustion engine. 
     
     
         20 . The chemical heat pump according to  claim 1 , wherein the tube is in thermal contact with a boiler. 
     
     
         21 . The chemical heat pump according to  claim 1 , wherein the tube is in thermal contact with a district heating plant. 
     
     
         22 . The chemical heat pump according to  claim 21 , wherein the tube is in contact with a liquid in a district heating plant.