Heat exchanger with recuperating and condensing functions and heat cycle system and method using the same

Abstract

A heat exchanger with recuperating and condensing functions is provided. The heat exchanger includes a pressure vessel, a recuperating pipe and a cooling stream pipe. The pressure vessel has an inlet, an outlet and a baffle. The baffle, located between the inlet and the outlet, divides the interior of the pressure vessel into a working fluid recuperating region and a working fluid condensing region. The recuperating pipe is disposed in the pressure vessel, and passes through the working fluid recuperating region to heat a liquid working fluid flowing through the recuperating pipe. The cooling stream pipe is disposed in the pressure vessel, and passes through the working fluid condensing region to cool a vapor working fluid flowing into the pressure vessel. The vapor working fluid passes through the working fluid recuperating region and then flows into the working fluid condensing region.

What is claimed is: 
     
         1 . A heat exchanger with recuperating and condensing functions, comprising:
 a pressure vessel having an inlet, an outlet and a baffle, wherein the baffle, located between the inlet and the outlet, divides an interior of the pressure vessel into a working fluid recuperating region and a working fluid condensing region;   a recuperating pipe disposed in the pressure vessel, wherein the recuperating pipe passes through the working fluid recuperating region to heat a liquid working fluid flowing through the recuperating pipe; and   a cooling stream pipe disposed in the pressure vessel, wherein the cooling stream pipe passes through the working fluid condensing region to cool a vapor working fluid flowing into the pressure vessel,   wherein, the vapor working fluid passes through the working fluid recuperating region and then flows into the working fluid condensing region.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein a plurality of deflectors, configured in the interior of the pressure vessel, is disposed in the working fluid recuperating region and arranged at intervals to form a channel via which the vapor working fluid passes through the deflectors. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the baffle has a passage outlet via which the vapor working fluid flows into the working fluid condensing region. 
     
     
         4 . The heat exchanger according to  claim 2 , wherein the deflectors comprise a plurality of first deflectors and a plurality of second deflectors staggered with each other to form an S-shaped channel. 
     
     
         5 . The heat exchanger according to  claim 2 , wherein the deflectors are perforated plates, semi-closed stoppers or spiral deflectors. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein twisted tapes, wire coils, wire brushes or blocks, which make the liquid working fluid and/or cooling stream generate secondary flows, are disposed in the interior of the recuperating pipe and/or the cooling stream pipe. 
     
     
         7 . A heat cycling system, comprising:
 a heat exchanger with recuperating and condensing functions, comprising:
 a pressure vessel having an inlet, an outlet and a baffle, wherein the baffle divides the interior of the pressure vessel into a working fluid recuperating region and a working fluid condensing region; 
 a recuperating pipe disposed in the pressure vessel, wherein the recuperating pipe passes through the working fluid recuperating region to heat a liquid working fluid flowing through the recuperating pipe; and 
 a cooling stream pipe disposed in the pressure vessel, wherein the cooling stream pipe passes through the working fluid condensing region to cool a vapor working fluid flowing into the pressure vessel, 
 wherein, the vapor working fluid passes through the working fluid recuperating region and then flows into the working fluid condensing region; 
   an evaporator connected to an outlet of the recuperating pipe to heat the liquid working fluid up to a vapor state;   a power generation module connected to an outlet of the evaporator through a first pipe and connected to the inlet of the pressure vessel through a second pipe; and   a pump connected to the outlet of the pressure vessel through a third pipe and connected to an inlet of the recuperating pipe through a fourth pipe.   
     
     
         8 . The heat cycling system according to  claim 7 , wherein a plurality of deflectors, configured in the interior of the pressure vessel, is disposed in the working fluid recuperating region and arranged at intervals to form a channel via which the vapor working fluid passes through the deflectors. 
     
     
         9 . The heat cycling system according to  claim 7 , wherein the baffle has a passage outlet via which the vapor working fluid flows into the working fluid condensing region. 
     
     
         10 . The heat cycling system according to  claim 8 , wherein the deflectors comprise a plurality of first deflectors and a plurality of second deflectors staggered with each other to form an S-shaped channel. 
     
     
         11 . The heat cycling system according to  claim 8 , wherein the deflectors are perforated plates, semi-closed stoppers or spiral deflectors. 
     
     
         12 . The heat cycling system according to  claim 7 , wherein twisted tapes, wire coils, wire brushes or blocks, which make the liquid working fluid and/or cooling fluid generate secondary flows, are disposed in the interior of the recuperating pipe and/or the cooling stream pipe. 
     
     
         13 . A heat exchanging method, comprising:
 providing a pressure vessel having a recuperating pipe, a cooling stream pipe and a baffle, wherein the baffle divides an interior of the pressure vessel into a working fluid recuperating region and a working fluid condensing region, the recuperating pipe passes through the working fluid recuperating region, and the cooling stream pipe passes through the working fluid condensing region;   introducing a vapor working fluid into the pressure vessel to heat a liquid working fluid flowing through the recuperating pipe;   guiding the vapor working fluid to flow into the working fluid condensing region from the working fluid recuperating region; and   guiding the vapor working fluid to pass through the working fluid condensing region to cool the vapor working fluid to a liquid state.   
     
     
         14 . The heat exchanging method according to  claim 13 , wherein a plurality of deflectors, configured in the interior of the pressure vessel, is disposed in the working fluid recuperating region and arranged at intervals to form a channel via which the vapor working fluid passes through the deflectors. 
     
     
         15 . The heat exchanging method according to  claim 14 , wherein the baffle has a passage outlet via which the vapor working fluid flows into the working fluid condensing region. 
     
     
         16 . The heat exchanging method according to  claim 14 , wherein the deflectors comprise a plurality of first deflectors and a plurality of second deflectors staggered with each other to form an S-shaped channel. 
     
     
         17 . The heat exchanging method according to  claim 14 , wherein the deflectors are perforated plates, semi-closed stoppers or spiral deflectors. 
     
     
         18 . The heat exchanging method according to  claim 13 , wherein twisted tapes, wire coils, wire brushes or blocks, which make the liquid working fluid and/or cooling fluid generate secondary flows, are disposed in the interior of the recuperating pipe and/or the cooling stream pipe.