Abstracts Oral Presentations - Solar Food Processing Network

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International Solar Food Processing Conference 2009 PROCESSING OF AGRICULTURAL PRODUCTS IN SOLAR COOKER FOR INCOME GENERATION N. M. Nahar, P. Sharma and G. R. Chowdhary Central Arid Zone Research Institute, Jodhpur-342003, India Topic addressed: Solar food processing and back-up systems, how to ensure sustainable energy supply Introduction With fast growing population and rapid growth of industries, the consumption of energy is increasing enormously. The requirement of energy for the next century is 100 Q (1 Q = 2.98 x 10 14 kW). The reserve of fossil fuels of the entire world including known and unknown sources is not more than 50 Q. Therefore, at the present rate of energy consumption the world energy resources will be exhausted in 50 to 100 years. Therefore, there is need to harness solar energy and other alternative energy sources. The solar radiation outside the earth’s atmosphere remains practically constant and is 1.353 KWh/m 2 . The eccentricity of the earth’s orbit results in variation of about + 3 %. The radiation received at the earth’s surface is considerably reduced below the extraterrestrial value due to reflection, absorption and scattering of radiation in the earth’s atmosphere, therefore, the total solar radiation received at the earth’s surface consists of direct and diffuse radiation. India occupies better position regarding solar energy potential. In the month of December, solar radiation increases from 2.6 KWh/m 2 day at Gulmarg to 3.7 KWh/m 2 day at New Delhi, 4.1 KWh/m 2 day at Calcutta, 4.5 KWh/m 2 day at Jodhpur and 4.3 KWh/m 2 day at Kodaikanal. During the period November to February i.e. winter season, most of the Indian stations receive 4.0 to 6.3 KWh/m 2 . During summer season i.e. March to May, this value ranges from 5.0 to 7.4 KWh/m 2 . The arid and semi-arid part of the country receive much more radiation as compared to rest of the country with the mean annual daily solar radiation received at Jodhpur i.e. 6.0 KWh/m 2 . Summary Solar cookers are generally used for cooking of food for domestic as well as community places. But solar cooker can also be used in agro based industries e.g. processing of Indian goose berry ( Aanwala ), jujube ( ber ), for making jam & jelly, chutney and preparation of rose syrups & gulkand from rose and sugar. These materials are prepared in agro based industries by using conventional fuels. Rose water has been prepared. Rose petals 100 gm per litre in water was boiled in the solar cooker for two hours. After boiling rose water was collected and 500 gm sugar per litre was mixed and again put into the cooker for boiling. The solution is rose syrup and remaining material was mixed with sugar and again put into the cooker and it became gulkand. Similarly Aanwala chutney was also prepared. Crushed green Aanwala mixed with sugar and put into the cooker. It was ready within three hours. Different solar cookers viz. hot box solar cooker, large size solar cooker, community solar cooker can be used for processing 2 kg, 10 kg and 40 kg product per day respectively depending upon requirement. Detailed design aspects and procedure of processing will be reported along with income one can generate from solar cooker. 44
International Solar Food Processing Conference 2009 Solar Food Processing Network 2009 Rolf Behringer, International Solar Energy Society, Wiesentalstrasse 50, 79115 Freiburg, sun@robeh.de, tel:+49-761-1373680 / fax: +49-761-4808412 Topic(s) addressed: International marketing, Networking 1. Introduction The International Solar Energy Society (ISES) has launched the Solar Food Initiative to address issues relevant to the wider use of solar food processing technologies, the production of quality products, as well as marketing and public acceptance of solar food products. The actual status of the Solar Food Processing Network will be presented and an outlook for future goals and activities will be given. 2. Summary Solar food processing is an innovative and multi-faceted technique capable of addressing various problems faced by people in many parts of the world. The implementation of technologies for food processing and conservation through solar energy can help to reduce poverty, improve health conditions, create sustainable local economic opportunities, and more importantly, limit environmental damage by promoting the use of clean / renewable energy sources. Together with new and existing partners from different countries (experts, politicians, farmers, development NGOs and women’s organisations), ISES intends to apply, test, evaluate and improve existing solar food technologies, to obtain high quality standards in sustainable food production and to promote this economical and ecologically viable technology. Many regions in the global South have excellent solar radiation potential, but often people lack awareness on how to harness this energy. The introduction of appropriate solar technologies provides access to ‘free’ energy and opens a wide range of sustainable energy consuming activities. The main target group is people in rural areas and townships, who often do not have access to grid-electricity. Communities that generate an excess supply of fruits and vegetables are especially interesting target areas, because they have the motivation to find practical means to conserve the fruits of their labour. The project aims to extend the use of, and to develop efficient methods of, solar food processing for the following activities: - Conservation of fruits and vegetables - Drying crops - Roasting different kind of nuts - Pasteurising juice, fruits and vegetables - Baking bread and cake. 45
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Abstracts Oral Presentations - Solar Food Processing Network

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