Heat pump cycle system and method of providing combined cooling and heating supply

Abstract

A heat pump cycle system and a method for providing combined cooling and heating supply are disclosed. The heat pump cycle system comprises a working medium reservoir, an absorbing solution reservoir, and a compression heat pump. The upper portions of the working medium reservoir and the absorbing solution reservoir are connected by a gas passage. The compression heat pump comprises a compressor, a condenser, a throttle valve and an evaporator, all of which are connected by a steam pipeline accordingly. The working medium reservoir contains a working medium and further comprises a first heat exchanger, and the evaporator. The absorbing solution reservoir contains an absorbing solution and further comprises a second heat exchanger and the condenser. The system utilizes electricity during the electricity consumption trough, to operate the compression heat pump cycle during the reproducing process.

1 . A heat pump cycle system comprising
 a working medium reservoir, an absorbing solution reservoir, and a compression heat pump;   wherein said working medium reservoir is connected with the upper portion of said absorbing solution reservoir through a steam passage;   wherein said compression heat pump comprises a compressor, a condenser, a throttle valve, and an evaporator, all of which are connected through pipelines;   wherein said working medium reservoir contains a working medium;   wherein said working medium reservoir further comprises a first heat exchanger;   wherein the evaporator of said compression heat pump is situated inside said working medium reservoir;   wherein said absorbing solution reservoir is filled with an absorbing solution;   wherein said absorbing solution reservoir further comprises a second heat exchanger; and   wherein the condenser of said compression heat pump is situated inside the absorbing solution reservoir.   
     
     
         2 . The heat pump cycle system of  claim 1  further comprising an absorbing solution recycle pump, an absorbing solution spray system, a working medium recycle pump, and a working medium spray system;
 wherein said absorbing solution recycle pump is situated between the absorbing solution reservoir and the absorbing solution spray system;
 wherein said absorbing solution recycle pump recycles the absorbing solution between the absorbing solution reservoir and the absorbing solution spray system; 
 
 wherein said working medium recycle pump is situated between the working medium reservoir and the working medium spray system;
 wherein said working medium recycle pump recycles the working medium between the working medium reservoir and the working medium spray system; 
 
 wherein said evaporator of the compression heat pump is situated inside the working medium reservoir, or in the working medium circulation loop, or in the circulation loop of the first heat exchanger; and 
 wherein said condenser of the compression heat pump is situated in the absorbing solution reservoir, or in the absorbing solution circulation loop, or in the circulation loop of the second heat exchanger. 
 
     
     
         3 . The heat pump cycle system of  claim 1 , wherein said absorption solution comprises the working medium and an absorbent;
 wherein the working medium is selected from water, ammonia, methanol, ethanol, and mixtures thereof; and   wherein the absorbent is selected from LiBr, NaBr, KBr, NH 4 Br, MgBr 2 , CaBr 2 , LiI, NaI, KI, NH 4 I, MgI 2 , CaI 2 , LiCl, NaCl, KCl, NH 4 Cl, MgCl 2 , CaCl 2 , LiNO 3 , NaNO 3 , KNO 3 , NH 4 NO 3 , Mg(NO 3 ) 2 , Ca(NO 3 ) 2 , and mixtures thereof.   
     
     
         4 . The heat pump cycle system of  claim 1 , wherein said absorbing solution is a saturated solution or a supersaturated solution. 
     
     
         5 . The heat pump cycle system of  claim 1  further comprising at least one of a solar thermal collector, a terrestrial heat device, a reclaimed-water supply device, and an air heat exchanger, for supplying heat to the fires heat exchanger in the working medium reservoir. 
     
     
         6 . A method for providing combined cooling and heating supply utilizing the heat pump cycle system of  claim 1  comprising:
 a working process;
 wherein under a first pressure, the cooling medium circulates in the first heat exchanger, the heating medium circulates in the second heat exchanger, and the working medium in the working medium storage pump absorbs the heat of the cooling medium and evaporates to form a gaseous working medium; 
 wherein the gaseous working medium enters the absorbing solution reservoir, and is absorbed by the absorbing solution with heat being released; and 
 wherein the cooling medium supplies cooling, and the heating medium supplies heating; and 
 
 a reproducing process;
 wherein under a second pressure, the compression heat pump starts, the evaporator absorbs heat, the condenser releases heat with which the absorbing solution is heated and the working medium evaporates into the gaseous working medium from the absorbing solution, the gaseous working medium enters the working medium reservoir and condenses into a liquid; and 
 
 wherein the working process and the reproducing process are carried out alternatively. 
 
     
     
         7 . The method of  claim 6 , wherein the second pressure is lower than the first pressure. 
     
     
         8 . The method of  claim 6 , wherein the compression heat pump utilizes electricity when the general electricity consumption is low. 
     
     
         9 . The method of  claim 6 , wherein the first pressure is higher than about 1 kPa, and the second pressure is between about 0.6 kPa and about 1 kPa.