Bich Huy Nguyen
Nong Lam University

Published : 2 Documents
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Solar Cooling and Dehumidification Systems - a review Nguyen, Bich Huy; Nguyen, Hay
Asia Pacific Journal of Sustainable Agriculture, Food and Energy Vol 2, No 1 (2014): Agriculture Food and Energy for Future
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy Network (SAFE Network)

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Abstract

Recently, cooling system, especially air-conditioning system, can not be absent in many fields such as appliances (homes, schools, shopping malls, factories, and theaters), food, agro-products and pharmaceutical storages, and so forth. Most of the conventional cooling systems driven by electrical power while solar energy, rather than a burning fuel, can provide the heat energy for these refrigeration processes. This paper reviews how, what, and where the solar energy can be applied for cooling systems. The types of sorption processes and the electrical and thermo-mechanical systems using solar energy have been analyzed. Many studies indicated that the absorption system is most suitable for solar cooling systems. Both theoretical and experimental results also showing that solar sorption refrigeration and air-conditioning are reasonable at present and for future applications. The cost of system, the simple and combine-system in designing, maintaining and controlling of system via using network and the simulation for the system are some perspectives need to study to develop the solar cooling systems. Keywords: solar energy, cooling systems, air conditioning, renewable energy
A Study on Beef Drying Regime towards Sustainable Energy Nguyen, Bich Huy; Nguyen, Hay
Asia Pacific Journal of Sustainable Agriculture, Food and Energy Vol 2, No 2 (2014): Global Action For Sustainable Agriculture, Food and Energy
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy Network (SAFE Network)

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Abstract

Beef  is one of the popular meat as the daily food in general and beef processing technology might become one of the interesting food processing research in Vietnam. There are many researchers and industrial companies study on how to create and to develop more kind of instant beef in which the beef drying plays as one of the common food using in Vietnam. For this aspect, finding out the suitable drying regime with the reasonable energy source towards the sustainable is highly attraction. This paper presents the different experimental studies on beef drying using hot-air dryer, heat pump dryer and solar dryer. The results proved that solar energy can be used as a sustainable energy source for forced convection dryer to drying beef with high quality and passing the food standard requirements. The drying regime for beef is as 1) temperature drying is 500C, and 2) the time drying is around 7 hours. The RH of beef might reduce from 75% to 36.7% within 7 hours or the RH rate is around 5.5% per hour when using solar dryer. The quality and color of dried-beef are also tested and it is shown that they are well and satisfied the market requirements. Key words: solar dryer; beef processing; dryer; head pump.