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Compact adsorption generator for solar and waste-heat applications: ice making and air conditioning in tropical or hot climate regions
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Shire, G. S. F. and Tamainot-Telto, Zacharie (2011) Compact adsorption generator for solar and waste-heat applications: ice making and air conditioning in tropical or hot climate regions. In: Saha, Bidyut Baran and Ng, Kim Choon, (eds.) Advances in Adsorption Technology. Huntington, New York: Nova Science Publishers, pp. 351-366. ISBN 978-1-60876-833-2
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Abstract
An experimental prototype of a compact adsorption generator for solar energy and waste-heat applications has been designed and built at Warwick University. The novel generator has low thermal mass and good heat transfer. The heat exchanger uses Nickel brazed stainless steel shims and spacers to create adsorbent layers (4 mm) between pairs of liquid flow channels of very low thermal mass. The generator is thermally cycled by means of a thermal fluid such as water, heated by a solar or waste-heat source. The system is designed to provide up to 1kW/kg specific cooling power with a typical COP of 0.30. The model of the current prototype has been fully validated against experimental data with ammonia - carbon SRD1352/3 and offers the flexibility of further simulations for various sorption cooling applications with various adsorbent-refrigerant pairs.
This chapter will mainly focus on simulation analysis for ice making and air conditioning in a tropical or hot climate region using commercially available activated carbon with ammonia refrigerant. Simulation results with hot climate conditions of 35 degrees C ambient temperature are presented and discussed with the prospect of designing and costing two types of solar collector (flat plate and evacuated tube) that drive the generator for ice making (T-E = -5 degrees C) and air conditioning (T-E = 15 degrees C) applications. The driving temperatures range from 100 degrees C to 150 degrees C. Based on the best thermodynamic cycle, the following activated carbons are selected for comparison: KOH-AC (monolithic), SRD1352/2 (compacted granular), FM10/700 (compacted fibre), and C-2132 (powder).
Overall, for the same collector area and regardless the carbon selected in the sorption generators, the use of evacuated tube collectors offers better the cooling production (15 to 35%) than the flat plate collectors. The best cooling performance and cost are obtained with KOH-AC (monolithic) while operating with evacuated tube collectors and for ice making application since the ratio of collector capital cost to the daily ice production is about is an element of 70/kg ice corresponding to a daily ice production per collector area of 8.6 kg m(-2).
| Item Type: | Book Item | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Engineering | ||||
| Publisher: | Nova Science Publishers | ||||
| Place of Publication: | Huntington, New York | ||||
| ISBN: | 978-1-60876-833-2 | ||||
| Book Title: | Advances in Adsorption Technology | ||||
| Editor: | Saha, Bidyut Baran and Ng, Kim Choon | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Number of Pages: | 16 | ||||
| Page Range: | pp. 351-366 | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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