International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
Experimental Study on Collection Efficiency of Solar Cooking System Pushkaraj D. Karande1, Siddharaj V. Kumbhar2, Basgonda K. Sonage3 1,2,3N.K. Orchid College of Engineering & Technology, Solapur, M.S., INDIA – 413002 ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - The experiment is conducted for cooking of the
rice by using square parabolic solar collector. The heat transfer to the food is via heating of oil. The main objective is to study the energy collection efficiency of solar cooker. From the experimentation it is found that the time required for cooking of half kg of rice with 1 liter water is only 3 hrs. The heat utilized for the cooking is only 1.45% out of incident heat. Key Words: Solar Cooking, Energy-Exergy Analysis, Collector Efficiency
1. INTRODUCTION Cooking is one of the daily activities for people. In most of the countries, rural people use wood, kerosene and other petroleum bi-products for cooking. It leads to deforestation and air pollution. Electric cookers and LPG are also used for cooking. The cost of electricity is high, and the supply of LPG is also burdened due to increasing population. Therefore alternative non-conventional energy resources are required to overcome pollution, deforestation and increasing demand of fossil fuels. Solar energy can be used as alternate source of energy for cooking. Several experiments were done for evaluating the thermal performance of different types of solar cookers by different researchers. The work of various authors is discussed below. The efficiency of box type solar cooker using the standard procedure of cooking power is 26.7% [1]. Performance of box type of solar cooker with two different cooking identical pots (with and without fins) is evaluated. The result shows that finned pot reduces time required for heating the water by 11%. And also rice is cooked in less time in finned pot [2]. Different types of solar cookers like box-type, panel-type and parabolic solar cooker are designed, constructed and investigated for evaluating the thermal performance. The result shows that the efficiency of box type solar cooker is greater than parabolic type solar cooker but less than the efficiency of panel-type solar cooker. But panel type of solar cooker attained the minimum temperature and parabolic type of solar cooker attained the maximum temperature [3]. The efficiency factor of parabolic solar cooker under the no load and full load condition (i.e. cooker filled with different volume of water along with rice) is experimentally Š 2017, IRJET
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Impact Factor value: 5.181
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investigated. Experimental results show that the optical efficiency factor was very little affected by solar insolation [4]. Performance and testing of hot box solar cooker with heat storage materials is worked upon, so that cooking can be done at evening. The efficiency of the hot box storage solar cooker was found to be 27.5% [5]. Work is carried out on parabolic solar cooker with convective heat exchanger system for off-place cooking. Experimental result shows that the energy used for cooking, out of incident energy, is only 3.36% [6].Hybrid solar cooker with sensible heat storing material (oil), cooking can be carried out during the day time and even during evening period [7]. The desired sensorial properties of food like flavour, color, texture depends upon the heat transfer to food. Therefore in most of food processing industry, heat transfer media (oil) is used for heat transfer from source to the food [8]. Therefore present experimental investigation is carried on the performance of solar cooker with heat transfer media (oil), which is rarely seen in literature.
2. METHODOLOGY 2.1 Experimental Setup The experimental set up is as shown in the Fig-1. It consists of parabolic dish collector, copper tank, aluminium vessel, manual tracking mechanism, thermocouples and temperature indicating device etc.
Fig -1: Experimental setup of solar cooker Aluminium anodized parabolic dish collector having aperture area of 1.6m2 with focal length of 400mm is used as solar collector. The copper tank having diameter 0.22m and height 0.23m is used as thermal energy storage. It contains heating oil and it transfers the heat to the food. The aluminium vessel ISO 9001:2008 Certified Journal
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