On Solar Energy Utilization for Drying Technology

Abstract

Abstract-Solar drying is one of the oldest drying techniques in which solar radiation is used. Drying is an essential process in the preservation of agricultural crops and in industries, such as textile production, dairy processing, cement production, clay brick production, tile production, wood and timber processing, wastewater treatment and biomass treatment. Solar drying is another very important application of solar energy. Solar dryers use air collectors to collect solar energy. Solar dryers are used primarily by the agricultural industry. The purpose of drying an agricultural product is to reduce its moisture content to a level that prevents its deterioration. In drying, two processes take place; One is a heat transfer to the product using energy from the heating source, and the other is a mass transfer of moisture from the interior of the product to its surface and from the surface to the surrounding air. In short, we conduct a comprehensive review of summarize the research and development work for solar drying. It is hoped that this review work maybe valuable and appropriate for further development work.Index Terms-Solar drying, solar energy, solar thermolysis. I. INTRODUCTIONSolar drying is one of the oldest drying techniques in which solar radiation is used, i.e. drying under direct sunlight to preserve food or non-food products since ancient times. Solar drying does not require man produced energy, uses renewable energy and applicable in any part of the world. Nevertheless, in order to increase the efficiency of material drying using solar radiation, proper innovation or application is needed. Owing to costly, limited, and non-environmentally friendly fossil fuels, solar drying is becoming a popular option to replace the mechanical thermal dryers [1].The main aim of this paper is to summarize the research and development work for solar drying. It is hoped that this review work maybe valuable and appropriate for greenhouse Manuscript received August 29, 2016; revised November 4, 2016 kr).Chan Jin Park is with the Department of Energy and Env. Engineering and the Department of Climate International Cooperation, Incheon National University, Republic of Korea (e-mail: cjpark@inu.ac.kr). gas reduction technology. II. HISTORY OF SOLAR ENERGYProbably the oldest large-scale application known to us is the burning of the Roman fleet in the bay of Syracuse by Archimedes, the Greek mathematician and philosopher (287-212 B.C.). Scientists discussed this event for centuries. From 100 B.C. TO 1100 A.D., authors made reference to this event, although later it was criticized as a myth because no technology existed at that time to manufacture mirrors [2]. The basic question was whether or not Archimedes knew enough about the science of optics to devise a simple way to concentrate sunlight to a point at which ships could be burned from a distance. Nevertheless, Archimedes had written a book, On Burning Mirrors [3], which is known only from references, since no copy survived.During the 18th century, solar furnaces capab...

Drying methods for municipal solid waste quality improvement in the developed and developing countries: A review

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“…Numerous studies [6,16,25,26,30,[55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73] analyzed and reviewed various solar drying types, their drying periods and efficiencies related to drying of fruits, vegetables, agricultural and marine products, biomass and solid wastes, etc. Among them, Pawale et al [73] proposed a potential design about hybrid MSW solar dryer with the solar absorber plate assembly and the electrical supplied heating coil as an external energy source.…”

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Solar drying of granulated waste blends for dry biofuel production

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Selección de tecnología apropiada para el secado solar de productos agrícolas

“…Un secador solar bien diseñado puede superar las desventajas del secado solar tradicional y la calidad del producto seco puede mejorarse. El rendimiento del secador solar depende de varios parámetros ambientales, como la radiación solar y la temperatura ambiente (Jambhulkar et al, 2017;Yoo et al, 2017). Así, para seleccionar un secador solar para un producto alimenticio en específico, es necesario evaluar su rendimiento técnico y proporcionar una base para compararlo con otros secadores.…”