Experimental Study on Consolidated Composite Adsorbents in an Adsorption Refrigeration System
In adsorption refrigeration systems, adsorbent commonly used is in the form of powder or granular. The thermal contact resistance between adsorbent particles and the thermal contact resistance between the sorbent and heat transfer surface are large. Using consolidated adsorbent is an effective way t...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2016-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2016.06.079 |
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| Summary: | In adsorption refrigeration systems, adsorbent commonly used is in the form of powder or granular. The thermal contact resistance between adsorbent particles and the thermal contact resistance between the sorbent and heat transfer surface are large. Using consolidated adsorbent is an effective way to improve heat transfer performance. In this paper, expanded natural graphite treated with sulfuric acid (ENG-TSA) is employed as the host matrix of composite activated carbon (AC) and composite CaCl2 adsorbents. An adsorption prototype using separate thermosyphon heat pipe technology is established. Owing to the highly thermal conductive consolidated adsorbents, no fins are needed inside the adsorbers. In the experiments, the system performance is analyzed from three aspects: heat transfer performance, cycle time and evaporation/condensation temperature. The results show that the COP, SCP and volumetric refrigeration density of the system employing AC/ENG-TSA are 0.140, 86.1W/kg and 16.11 kW?h/m3, respectively, the COP, SCP and volumetric refrigeration density of the system employing CaCl2/ENG-TSA are 0.279，288.6 W/kg and 54.03 kW?h/m3, respectively. The refrigeration performances are improved significantly compared with conventional adsorbents. |
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| ISSN: | 0253-4339 |