Investigation of Specific Heat and Thermal Conductivity of Rasa Grape (Vitis Vinifera L.) as a Function of Moisture Content
Journal Title: Journal of Agricultural Machinery - Year 2013, Vol 3, Issue 2
Abstract
Kurdistan Rasa grape is one of the delicious and sweet fruits with black color. It contains vitamins E, C and some protectors such as antioxidants. In order to design equipments and facilities for drying, preservation and processing of Rasa grape, it is necessary and important to know about its specific heat and thermal conductivity. In this paper the specific heat and thermal conductivity of Rasa grape were studied. The method of mixtures and hot wire as a heating source was used for measuring the specific heat and thermal conductivity, respectively. The experimental variables were temperature at four levels of 40, 50, 60 and 70 °C and moisture content at four levels of 22.36, 37.56, 52.13 and 71.53%. The results showed that the specific heat and thermal conductivity of Rasa grape increased linearly from 1.6523 kJ kg-1°C-1 to 3.3253 kJ kg-1°C-1 and 0.1252 W m-1°C-1 to 0.4202 W m-1°C-1 respectively, with increasing moisture content and temperature. The results also showed that the effect of moisture content on increasing the specific heat and thermal conductivity was more significant than that from temperature rise.
Authors and Affiliations
J. Khodaei,H. Samimi,
Keywords
Related Articles
- EP ID EP717683
- DOI -
- Views 68
- Downloads 0
The Efficiency of Cold Plasma Treatment on Aspergillus Niger Disinfection and Quality Properties Preservation of Grapes during the Post-harvest Period
IntroductionGrape is a major horticultural crop with a high nutritional value in the world. The optimal geographic and climatic conditions in Iran have positioned it as one of the most important regions for grape cultiva...
Analysis of Energy Efficiency for Greenhouse Cucumber Production Using Data Envelopment Analysis (DEA) Technique; Case Study: Shahreza Township
In this research energy efficiency for greenhouse cucumber production in Shahreza township located in Esfahan province using data envelopment analysis (DEA) technique was studied. In this study, data were obtained from 2...
Investigation of Energy Use Efficiency for Dry Wheat Production Using Data Envelopment Analysis (DEA) Approach; Case Study: Silakhor Plain
In this research energy efficiency for dry wheat production in three levels including 0.1 up to2, 2.1 up to 5 and over 5.1 hectares for the farming year 2008-2009 in Silakhor plain located in Borujerd and Dorud divisions...
Evaluation and Optimization of Energy and Environmental Indicators Using Life Cycle Assessment and Data Envelopment Analysis(Case Study: Industrial Cattle Farms in Northern Khuzestan)
Introduction: Environmental crises and resource depletion have adversely affected environmental resources and food security in the world. Therefore, with the global population growth in the coming years and the rising ne...
Evaluation of Vegetation Index of Greenhouse Tomato and Cucumber using non-destructive Sensors
Introduction One of the most important factors in agricultural production is nitrogen which has a great impact on plant growing, yield performance and plant quality production. The optimum amount of nitrogen fertilizer i...