Solar composite tube, solar composite bed comprising the same, and solar cold and heat supply system comprising solar composite bed

Abstract

A solar composite tube, including a solar vacuum tube having two open ends; a water path; an adsorbent; and an adsorbate. The solar vacuum tube includes an outer metal tube and an inner metal tube which are coaxially disposed inside the solar vacuum tube. The water path is formed between the outer metal tube and the solar vacuum tube; the adsorbent is disposed between the outer metal tube and the inner metal tube and is configured to exchange heat with water in the water path outside the outer metal tube; the inner metal tube includes a plurality of through holes; the adsorbate is disposed in the inner metal tube; and the adsorbate and the adsorbent form an adsorption-desorption working pair. The invention also provides a solar composite bed including a lower header, an upper header, and the solar composite tube.

The invention claimed is: 
     
         1 . A solar composite tube, comprising:
 a solar vacuum tube having two open ends, the solar vacuum tube comprising an outer metal tube and an inner metal tube which are coaxially disposed inside the solar vacuum tube;   a water path;   an adsorbent; and   an adsorbate;   
       wherein
 the water path is formed between the outer metal tube and the solar vacuum tube; 
 the adsorbent is disposed between the outer metal tube and the inner metal tube and is configured to exchange heat with water in the water path outside the outer metal tube; 
 the inner metal tube comprises a plurality of through holes; 
 the adsorbate is disposed in the inner metal tube; and 
 the adsorbate and the adsorbent form an adsorption-desorption working pair. 
 
     
     
         2 . The tube of  claim 1 , wherein the through holes on the inner metal tube have diameters of between 1 and 2 mm. 
     
     
         3 . The tube of  claim 1 , wherein the adsorption-desorption working pair comprises a gaseous adsorbate and a solid adsorbent. 
     
     
         4 . The tube of  claim 2 , wherein the adsorption-desorption working pair comprises a gaseous adsorbate and a solid adsorbent. 
     
     
         5 . The tube of  claim 3 , wherein the adsorption-desorption working pair is methanol-active carbon or ammonia-active carbon. 
     
     
         6 . The tube of  claim 4 , wherein the adsorption-desorption working pair is methanol-active carbon or ammonia-active carbon. 
     
     
         7 . A solar composite bed, comprising:
 a lower header;   an upper header; and   the solar composite tube of  claim 1 , the solar composite tube being disposed between and communicating with the lower header and the upper header;   
       wherein
 the lower header and the upper header each comprise an outer casing and inner sleeve; 
 a water header is disposed between the outer casing and the inner sleeve; 
 the inner sleeve is an adsorbate header; 
 the water header of the lower header communicates with the water header of the upper header via the water path of the solar composite tube; 
 the adsorbate header of the lower header communicate with the adsorbate header of the upper header via the inner metal tube of the solar composite tube. 
 
     
     
         8 . The bed of  claim 7 , wherein the solar composite tube is from 15 to 20 in number. 
     
     
         9 . A solar cold and heat supply system, comprising:
 at least one or a plurality of the solar composite beds of  claim 7  which are connected in parallel with one another;   an adsorbate cycling sub-system;   a water cycling sub-system;   pipes for connecting different sub-systems or devices; and   water pumps and valves disposed on the pipes;   
       wherein
 the adsorbate cycling sub-system comprises: a condenser, a liquid storing tank, and an evaporator; 
 a working medium inlet of the condenser is connected to the adsorbate header of the upper header of the solar composite bed; a working medium outlet of the evaporator is connected to the adsorbate header of the lower header of the solar composite bed; 
 the water cycling sub-system comprises: a hot-water storage tank, a cold-water tank, and a cold-water storage tank; 
 a water outlet of the hot-water storage tank and a water outlet of the cold-water tank communicate with the water header of the lower header of the solar composite bed; a water inlet of the hot-water storage tank and a water inlet of the cold-water tank communicate with the water header of the upper header of the solar composite bed; 
 the cold-water storage tank, the cold-water tank, and the evaporator communicate with one another via water cycling pipelines; and 
 the hot-water storage tank and the cold-water storage tank are connected to a user.