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Publication Title | Thermodynamic Analysis of a Rankine Cycle Powered Vapor Compression Ice Maker Using Solar Energy

Organic Rankine Cycle

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Hindawi Publishing Corporation

e Scientific World Journal

Volume 2014, Article ID 742606, 6 pages http://dx.doi.org/10.1155/2014/742606

Research Article

Thermodynamic Analysis of a Rankine Cycle Powered Vapor Compression Ice Maker Using Solar Energy

Bing Hu,1,2 Xianbiao Bu,1 and Weibin Ma1

1 Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China

2 University of Chinese Academy of Sciences, Beijing 100049, China

Correspondence should be addressed to Bing Hu; hubing@ms.giec.ac.cn

Received 13 March 2014; Accepted 1 August 2014; Published 17 August 2014

Academic Editor: Antonio Lecuona

Copyright © 2014 Bing Hu et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

To develop the organic Rankine-vapor compression ice maker driven by solar energy, a thermodynamic model was developed and the e ects of generation temperature, condensation temperature, and working uid types on the system performance were analyzed. e results show that the cooling power per square meter collector and ice production per square meter collector per day depend largely on generation temperature and condensation temperature and they increase rstly and then decrease with increasing generation temperature. For every working uid there is an optimal generation temperature at which organic Rankine e ciency achieves the maximum value. e cooling power per square meter collector and ice production per square meter collector per day are, respectively, 126.44 W m−2 and 7.61 kg m−2 day−1 at the generation temperature of 140∘C for working uid of R245fa, which demonstrates the feasibility of organic Rankine cycle powered vapor compression ice maker.

1. Introduction

In recent years, there is an increasing need for cooling due to global warming, so, the energy consumption used for cooling has increased drastically [1, 2]. e use of solar energy is one important contribution for the reduction of fossil fuel consumption and harmful emissions to the envi- ronment, while solar cooling for food, beverage, and seafood preservation or air-conditioning is an attractive application of solar energy because both the insolation supply and the need for refrigeration reach maximum levels in the same period. In particular in some places, such as Tibet in China, a large proportion of people live in rural or remote locations where electricity is presently far from su cient; also the solar radiation is the most su cient in those areas and refrigeration device driven by solar energy is a very useful application for food and vaccine preservation. Solar powered ice makers or refrigerators have been reported by a lot of researchers [3– 5]. Among these researches, there are many di erent ways to convert solar energy into cooling processes [6–9]; these are by the use of the absorption/adsorption refrigeration cycle and the organic Rankine cycle/vapor compression cycle

(ORC/VCC) [10–12]. Boubakri [13, 14] carried out tests on an adsorptive solar powered ice maker using methanol/carbon pair. Vasta et al. [15] presented a model for dynamic sim- ulation of an adsorptive ice maker and showed that the ice maker is able to freeze 5 kg of water during all days of June. Wang et al. [16] described the working principle of the combined cycles of solar refrigeration and heating, and their experimental results showed that the hybrid system is capable of heating 60 kg of water to about 90∘C as well as producing ice at 10 kg per day with a 2 m2 solar collector. Li et al. [17] developed a no valve, at plate solar ice maker and carried out experimental tests under both indoor and outdoor. Sumathy and Zhongfu [18] presented a solar-powered ice maker with the solid adsorption pair of activated carbon and methanol. In this paper, a simple at plate collector with an exposed area of 0.92 m2 was employed to produce ice of about 4-5 kg day−1 . Li and Wang [19] presented a uniform pressure model to describe the heat and mass transfer in an adsorbent bed for a at plate solar ice maker. Kiplagat et al. [20] proposed consolidated composite material made from expanded graphite powder impregnated with LiCl salt for use in solar powered adsorption ice makers. Freni et al. [21]

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