The Influence of the Greenhouse as Heat Source for Heat Pump Drying System Combined with Solar Greenhouse
Keywords:
solar, heat pump, dryer system, green houseAbstract
This research studied and developed the prototype system of heat pump dryer combined with solar greenhouse. The fresh chili was used as agricultural product for doing the experiment. The test was performed to compare 2 cases of study, including heat pump obtained heat from ambient air and from solar greenhouse. The experiments were performed at the same conditions. For case 1, the evaporator of heat pump was opened to receive heat from ambient air, and case 2, the evaporator of heat pump was covered with greenhouse. Each test was conducted with 20 kg of fresh chili during 9:00 - 21:00 for each day (12 hrs. per day: 3 days). The fresh chili was dried in drying chamber at temperature of 60 °C. The experimental results showed that drying with case 2 provided the dried chili with average moisture content of 16.20 %(w.b.)., while drying with case 1 the average moisture content of dried chili was 22.15 %(w.b.). The total electricity energy consumption was equal to 19.8 kWh and 21.1 kWh, respectively. Drying by using evaporator of heat pump covered with greenhouse (case 2) had greater performance than case 1 system. The Specific Energy Consumption (SEC) of both cases was 4.64 kWh/kg and 1.66 kWh/kg, respectively. The SEC and SEEC of case 2 were lower than case 1 of 12 % and 15 %, respectively. These results revealed that the evaporator of heat pump covered with greenhouse (case 2) was a factor that helped to enhance the system’s performance. Thus, it reduced the energy consumption of compressor since the temperature of heat source was increased. The study of mentioned system can be used for further comparison.
References
Barlev, D., Vidu, R. and Stroeve, P. 2011. Review Innovation in concentrated solar power. Solar Energy Materials & Solar Cells 95(10): 2703-2725.
Chaturvedi, S.K. and Shen, J.Y. 1984. Thermal performance of a direct expansion solar assisted heat pump. Solar Energy 33(2): 155-162.
Daghigh, R., Ruslan, M.H., Sulaiman, M.Y. and Sopian, K. 2010. Review of solar assisted heat pump drying systems for agricultural and marine products. Renewable and Sustainable Energy Reviews 14(9): 2564-2579.
Fudholi, A., Sopian, K., Ruslan, H.M., Alghoul, M.A. and Sulaiman M.Y. 2010. Review of solar dryers for agricultural and marine products. Renewable and Sustainable Energy Reviews 14(1): 1-30.
Gil, A., Medrano, M., Martorell, I., La.zaro, A., Dolado, P., Zalba, B. and Cabeza, L.F. 2010. State of the art on high temperature thermal energy storage for power generation. Part1-concepts, materials and modellization. Renewable and Sustainable Energy Reviews 14(1): 31-55.
Jareanjit, J. 2012. A Solar Dryer Technology and Its Development. KKU Research Journal 17(1): 110-124.
Jareanjit, J., Boonyanuwat, S. and Naemsai, T. 2014. Experimental Study on Thermal Potential and Energy consumption of Solar Greenhouse Dryer Combined with Heat Pump, pp. 52-59. In The 28th Conference of the Mechanical Engineering Network of Thailand (ME-NETT 28). Khonkaen, Thailand.
Jareanjit, J. and Naemsai, T. 2016. Experimental performance of pepper drying using solar assisted heat pump drying system, pp. 1067-1074. In The 30th Conference of the Mechanical Engineering Network of Thailand (ME-NETT 30). Songkhla, Thailand.
Kara, O., Ulgen, K. and Hepbasli, A. 2008. Exergetic assessment of direct-expansion solar assisted heat pump systems: review and modeling. Renewable and Sustainable Energy Reviews 12(5): 1383-1401.
Kohayakawa, M.N., Silveria-Junior, V. and Telis-Romero, J. 2004. Drying of mango slices using heat pump dryer, pp. 884-891. In Proceedings of the 14th international drying symposium; 2004. Sao Paulo City, Brazil.
Kuang, Y.H., Wang, R.Z. and Yu, L.Q. 2003. Experimental study on solar assisted heat pump system for heat supply. Energy Conversion and Management 44(7): 1089-1098.
Lewicki, P.P. 2006. Design of hot air drying for better foods. Trends in Food Science and Technology 17(4): 153-163.
Minka, C.J. 1986. Potential improvement to traditional solar crop drying in Cameroon: research and development solar drying in Africa, pp. 11-22. In Proceedings of a Workshop held in Dakar. Senegal.
Morrison, G.L. 1994. Simulation of packaged solar heat-pump water heaters. Solar Energy 53(3): 249-257.
Piga, A., Del Caro, A. and Corda, G. 2003. Influence of drying parameters on polyphenols and antioxidant activity. Journal of Agriculture and Food Chemistry 51(12): 3675-3681.
Prasertsan, S., Sean-saby, P. and Prateepchaikul, G. 1997. Heat pump dryer. Part 3: experiment verification of the simulation. International Journal of Energy Research 21: 1-20.
Roonprasang, N., Namprakai, P. and Pratinthong, N. 2006. Mathematical model and optimum sizing for a solar banana dryer combined with parabolic trough and phase change energy storage system in Thailand. KKU Engineering Journal 33(5): 495-510.
Sharma, S.J., Sharma, V.K., Ranjana, J.H.A. and Ray, R.A. 1990. Evaluation of the performance of a cabinet type solar dryer. Energy Conversion & Management 30(2): 75-80.
Smith, C.A., Belles, R.D. and Simon, A.J. 2007. Estimated International Energy Flows 2007. Lawrence Livermore National Lab. Available Source: http://flowcharts.llnl.gov/content/international/2007EnergyInternational.pdf, March 27, 2016.
Soponronnarit, S., Nathakaranakule, A., Wetchacama, S., Swasdisevi, T. and Rukprang, P. 1998. Fruit drying using heat pump. International Energy Journal 20(1): 39-53.
Strommen, I., Eikevik, T.M. and Odilio, A.F. 1999. Optimum design and enhanced performance of heat pump dryers. In Abudullah, K., Tamaunan, A.H., Maujumdar, A.S., eds. Proceedings of the first Asian-Australian drying conference. Bali, Indonesia.
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