Desiccant air-conditioning system

Abstract

To reduce energy consumption, a desiccant air-conditioning system is provided with: an air supply channel 1 that supplies outside air A 1 that flows from the outside, to an object to be air-conditioned; an exhaust channel 2 that exhausts return air A 2 that flows from the object to be air-conditioned, to the outside; a desiccant portion 10 that adsorbs moisture from the outside air A 1 passing through the air supply channel 1 , and that desorbs the adsorbed moisture to the return air A 2 passing through the exhaust channel 2 ; a first cooling portion 31 which is installed between the desiccant portion 10 and the object to be air-conditioned in the air supply channel, and which cools the outside air A 1 ; a second cooling portion 44 which is installed between the desiccant portion 10 and the first cooling portion 31 in the air supply channel, and which absorbs the heat from the outside air A 1 to cool it; a heating portion 45 which is installed between the desiccant portion 10 and the object to be air-conditioned in the exhaust channel 2 , and which heats the return air A 2 up to at least the regeneration temperature at which the desiccant portion 10 desorbs the moisture; and a heat supplying portion 50 that supplies the heat absorbed from the outside air A 1 by the second cooling portion 44 , to the heating portion 45.

1 . A desiccant air-conditioning system comprising:
 an air supply channel that supplies outside air that flows from the outside, to an object to be air-conditioned;   an exhaust channel that exhausts return air that flows from the object to be air-conditioned, to the outside;   a desiccant portion that adsorbs moisture from the outside air passing through the air supply channel, and that desorbs the adsorbed moisture to the return air passing through the exhaust channel;   a first cooling portion which is installed between the desiccant portion and the object to be air-conditioned in the air supply channel, and which cools the outside air;   a second cooling portion which is installed between the desiccant portion and the first cooling portion in the air supply channel, and which absorbs the heat from the outside air to cool it;   a heating portion which is installed between the desiccant portion and the object to be air-conditioned in the exhaust channel, and which heats the return air up to at least the regeneration temperature at which the desiccant portion desorbs the moisture; and   a heat supplying portion that supplies the heat absorbed from the outside air by the second cooling portion, to the heating portion.   
     
     
         2 . A desiccant air-conditioning system according to  claim 1 , comprising a sensible heat exchange portion that exchanges heat between the outside air in the air supply channel between the desiccant portion and the second cooling portion, and the return air in the exhaust channel between the heating portion and the object to be air-conditioned. 
     
     
         3 . A desiccant air-conditioning system according to  claim 1  or  claim 2 , comprising a control portion that increases and decreases the amount of heat supplied to the heating portion in proportion to the latent heat load of the object to be air-conditioned. 
     
     
         4 . A desiccant air-conditioning system according to  claim 3 , wherein
 the second cooling portion increases and decreases the amount of heat absorbed from the outside air according to the amount of heat to be supplied, and   the control portion cools the outside air in the first cooling portion such that the outside air to be supplied to the object to be air-conditioned reaches a target supply air temperature.   
     
     
         5 . A desiccant air-conditioning system according to  claim 1 , wherein
 the heat supplying portion further comprises:   a high-temperature heat transfer medium circuit, which is connected to the heating portion, and through which a high-temperature heat transfer medium that has a relatively high temperature circulates;   a low-temperature heat transfer medium circuit, which is connected to the second cooling portion, and through which a low-temperature heat transfer medium that has a relatively low temperature circulates; and   a heat pump that moves the heat of the low-temperature heat transfer medium to the high-temperature heat transfer medium.   
     
     
         6 . A desiccant air-conditioning system according to according to  claim 1 , comprising:
 a pre-cooling portion that cools the outside air, which is installed between the desiccant portion and the outside in the air supply channel;   a header that connects the pre-cooling portion and the first cooling portion; and   a centrifugal chiller that can supply chilled water to at least one of the pre-cooling portion and the first cooling portion.