DEVELOPMENT OF A REFRIGERATION SYSTEM FOR COOLING MILK AT RURAL REGIONS | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 13, Volume 30, Issue 2, April 2013, Page 507-520 PDF (655.69 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2013.102048 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| M E. M. Morsi | ||||
| Researcher, Agric. Eng. Res. Inst., Agric. Res. Center Egypt. | ||||
| Abstract | ||||
| The present paper presents an experimental evaluation of a solar refrigerator, prototype, based on an intermittent thermodynamic cycle of adsorption, using milk as refrigerant and the mineral zeolite as adsorber. This system uses a mobile adsorber, which is regenerated out of the refrigeration cycle and no condenser is applied. Because the solar regeneration is made in the ambient air for the regeneration, a SK14 solar cooker is considered. The cold chamber, with a capacity of 4 liters, is aimed for cooling milk. The objective is to analyze the advantages and disadvantages of the eventual use of this refrigerator in rural regions of Egypt, where no electricity is available. On the bases of the results obtained, a new prototype of refrigerator for rural regions is designed, based on the same thermodynamic cycle, but including changes in design and operation. According to the experiments Zeolite pan size of 2*20*25 cm proved to be the most optimum, it is the size recommended for use in milk cooler. According to the results of the mathematical modeling of drying of zeolite, the best describing the drying characteristic is Wang and Singh model. The regression equation R (correlation coefficient) indicates the degree of association between the observed and predicted values coefficient of efficient (Ce) was 0.999. | ||||
| References | ||||
|
Doymaz, I., M., Pala (2002). Hot air Drying Characteristtics of Red Pepper. Journal of food Engineering 55:335.
Doymaz, I., (2004). Drying kinetics of white mulberry. J. Food Eng., 61(3): 41-346.
Leite A. F. L. (1996) Sistema Frigorífico a Adsorcao Utilizando Carvao Ativado Metanol com Regeneracao por Energía Solar, Tese presentada en concurso publico para profesor titular, Universidade Federal da Paraíba, Campina Grande-PB, Brasil.
Meunier F. (1998). Solid sorption heat powered cycles for cooling and heat pumping application. Applied Thermal Engineering 18, pp. 715-729.
Ming D.W. and Mumpton, F.A. (1993). Zeolites in solar energy refrigeration. Transaction of American Society of Agricultural Engineers, 36:837-840
Pons, m (1996). Analysis of the adsorption cycles with thermal regeneration based the entropic mean temperaturesm Applied Thermal Eng., 615-627. | ||||
|
Statistics Article View: 124 PDF Download: 157 |
||||
