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Double-effect adsorption refrigeration device

a refrigeration device and double-effect technology, applied in refrigeration machines, climate sustainability, refrigeration safety arrangements, etc., can solve the problems of adsorption cycle technology, heat source temperature needed in refrigeration devices, low coefficient of performance,

Inactive Publication Date: 2009-04-16
NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]According to the present invention, waste heat of 100 to 150 degree centigrade which is supplied from an external heat source is directly used without lowering the temperature.

Problems solved by technology

A big obstacle to the development of adsorption cycle technology is its low coefficient of performance.
However, heat source temperature needed in the refrigeration device described in the prior art is above 150 degree centigrade.

Method used

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Embodiment Construction

[0018]The present invention proposes a double-effect adsorption refrigerating device having a high Coefficient of Performance (COP) close to 1 while a COP of the conventional device is around 0.7.

[0019]FIG. 1 shows an example of double-effect adsorption refrigerating device 1 of the present invention in a simple manner but a person skilled in this art could easily understand an actual refrigerating device from the description of the present invention.

[0020]Referring to FIG. 1, the refrigerating device of the present invention includes a first and second bed 11 and 12 consisting of adsorbent materials of zeolite 110 and silica gel 120 respectively. First bed 11 is designed and used in a high temperature adsorption cycle (HTC), while the second bed 12 is designed and used in a low temperature adsorption cycle (LTC).

[0021]In the double-effect cycle, the high temperature adsorption cycle (HTC) is used as the driving heat for the low temperature adsorption cycle (LTC).

[0022]Back to the F...

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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.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a device for refrigeration by evaporation and adsorption, whose principle consists in evaporating a liquid, that is, water in the present invention, under the effect of a depression sustained by adsorption of the vapors of said liquid. The present invention also relates to a refrigeration device utilizing a double-effect adsorption cycle in which a high temperature cycle (HTC) and low temperature cycle (LTC) is operated in particular interval range.[0003]2. Description of the Prior Art[0004]The principle of these types of refrigeration by evaporation of a refrigeration liquid and adsorption of vapor of this liquid has been well known and various types of devices have also been developed. A big obstacle to the development of adsorption cycle technology is its low coefficient of performance. Many advanced cycles have been proposed, focusing on improving the performance of the adsorption re...

Claims

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Application Information

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IPC IPC(8): F25B15/00
CPCF25B17/08Y02B30/64F25B49/043Y02B30/00Y02A30/27
Inventor AKISAWA, ATSUSHIKASHIWAGI, TAKAO
Owner NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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