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Design of solar powered adsorption heat pump with ice storage.

Author(s) : LAMBERT M. A.

Type of article: Article

Summary

The design and performance of a solar (and/or natural gas) powered adsorption (desiccant-vapour) heat pump for residential cooling (and heating) is described. The entire system is modelled and analyzed: adsorption heat pump itself, ice thermal storage reservoir, and solar collectors. The adsorption heat pump embodies patent pending improvements to the state-of-the-art which elevate coefficient of performance for cooling from a maximum of 1.2 reported in the literature to a conservatively predicted minimum of 1.5. The adsorption device utilizes economical, robust configurations (shell-and-tube) and components (helical annular finned tubes, multi-lumen tubes) commonly employed in heat exchangers in a manner heretofore untried, as well as other enhancements (metal wool to diffuse heat throughout the adsorbent). The vessel is all aluminium and the adsorbent-refrigerant pair is carbon-ammonia. The ice reservoir provides 24 h cooling. Two types of solar collector are determined to be satisfactory at the selected operating temperature of 170°C: (1) compound parabolic concentrator with high concentration ratio (10+) and automatic tilt adjustment, and (2) evacuated (0.001 atm) flat panel, similar to atmospheric pressure versions employed for domestic water heating. [Reprinted with permission from Elsevier. Copyright, 2006].

Details

  • Original title: Design of solar powered adsorption heat pump with ice storage.
  • Record ID : 2008-0642
  • Languages: English
  • Subject: Environment
  • Source: Applied Thermal Engineering - vol. 27 - n. 8-9
  • Publication date: 2007/06

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