Double-effect adsorption refrigeration device

• US 20090095012A1
• Filed: 10/12/2007
• Published: 04/16/2009
• Est. Priority Date: 10/12/2007
• Status: Abandoned Application

• Current Assignee: Tokyo University of Agriculture and Technology
• Original Assignee: Tokyo University of Agriculture and Technology
• Inventors: Kashiwagi, Takao, Akisawa, Atsushi
• Application Number:
  US11/974,307
• Publication Number:
  US 20090095012A1
• Time in Patent Office: Days
• US Class Current: 62/476
• CPC Class Codes: F25B 17/08 the absorbent or adsorbent being a solid, e.g. salt F25B17/12 takes precedence
• CPC Class Codes: F25B 49/043 Operating continuously
• CPC Class Codes: Y02A 30/27 Relating to heating, ventilation or air conditioning [HVAC] technologies
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

The present invention relates to an adsorption chiller using double-effect cycle utilizing middle driving heat source of 100-150 degree centigrade. The cycle consists of two cycles such as high temperature cycle (HTC) and low temperature cycle (LTC). Zeolite-water system and silica gel-water system are used as adsorbent-adsorbate pairs of HTC and LTC respectively. Waste heat of zeolite generated at during adsorption period of the zeolite is re-used for pre-heating and desorbing the silica gel.

Claims

1. A double effect adsorption refrigeration device comprising a first and a second bed provided for alternatively adsorbing and desorbing a refrigerant liquid in a predetermined one cycle time, in which the first bed comprises a first adsorbent material and the second bed comprises a second adsorbent material which is different from the first adsorbent material, said device further comprising a liquid circulation device provided between the first and second beds so that a heat generated by the first bed is transferred to the second bed for heating the same.

2. A double effect adsorption refrigeration device according to claim 1, in which said first adsorbent material is zeolite and said second adsorbent material is silica gel.

3. A double effect adsorption refrigeration device according to claim 2, further comprising an external heat source for heating the zeolite, a temperature of the external heat is 100 to 150 degree centigrade.

4. A double effect adsorption refrigeration device according to claim 3, in which said predetermined one cycle time is around 1200 seconds.

5. A double effect adsorption refrigeration device according to claim 4, in which an amount ratio of the zeolite and the silica gel (silica gel/zeolite) is from 0.8 to 1.0.

6. A double effect adsorption refrigeration device according to claim 5, in which an time ratio of a time of desorption time and adsorption time of the zeolite, or adsorption time and desorption time of the silica gel is 0.6 to 0.8.