Development of an Improved Vapour Compression Refrigeration System for Preservation of fresh Vegetables
Keywords:
Vapour compression refrigerator system, Temperature control device, temperature, relative humidity, bitter leaf, pumpkin leafAbstract
An improved vapour compression refrigeration system (VCRS) was developed for the preservation of fresh vegetables and its performance was evaluated. The cooling system operating with R134a as working fluid consists of an evaporator, compressor, condenser, capillary tube and a redesigned temperature control device (TCD). The refrigeration system has capacity to accommodate 0.02 metric tonnes (20 kg) of any fresh vegetables. The improved cooling system was used to preserve fresh vegetables such as: bitter leaf (Vernonia amygdalina Delile) and pumpkin leaf (Telfairia occidentalis). Study was conducted to check the freshness of the vegetables and data were observed daily. Results of the transient performance tests revealed that an average cabinet and ambient temperature of 3.64C and 26.89C were observed, and an average cabinet and ambient relative humidity of 94.50% and 45.23% were recorded respectively for the preserved vegetables. The needed optimum storage temperature range for the preservation of the selected vegetables samples were attained in cooling system at 2C – 4C with the aids of the incorporated newly designed TDC. The improved domestic vapour compression refrigeration system performed up to expectation as the shelf life of the tested sample inside the cooling system was extended by fourteen days relative to ambient storage.
References
Adetuyi, F.O., Ayileye, T.A. and Dada, I.B.O. (2008) Comparative Study of Quality Changes in Shea Butter Coated Pawpaw Carica papaya fruit during Storage Pakistan Journal of Nutrition Vol.7 (5), pp. 658- 662,
Adiaha, M. S. (2017) Complete guide to agricultural product processing and storage, World Scientific News Vol. 81(1), pp.1-52
Aharoni, N. (2004). Packaging modified atmosphere (MA) and controlled atmosphere (CA) principles and applications power point lecture slides. International research and development course on post-harvest biology and technology. The Volcani Centre, Isreal.
Akintunde, M.A. and Obadina, R.B. (2011). Development of a Refrigeration System for Storage of Pepper and Tomatoes, International Journal of Applied Engineering Research, India. Vol.6 (23-24), pp. 2561-2574
Tunde-Akintunde,T.Y., Oyelade,O.J., Akintunde,B.O.2014. Effect of drying temperatures and pre-treatments on drying characteristics, energy consumption, and quality of bell pepper. Agric Eng Int: CIGR Journal,16(2), pp. 108ï¼118.
Alam, M. S. Ashraf, M. A. Mia, M. I. A. and Abedin, M. Z. (2007) Study on grain storage facilities as food security measure in flood prone areas of Bangladesh, Progress. Agric.Vol. 18(2), pp.23-233.
APHLIS (2011) (African Post harvest Losses Information System) An innovative framework to analyse and compute quantitative Post harvest losses for cereals under different farming and environmental conditions in East and Southern Africa. http://publications.jrc.ec.europa.eu/repository/bitstream/111111111/15877/1/lbna24712enc.pdf , September 2018
Conteh, AMH, Yan, X, Moiwo, J.P (2015). The determinants of grain storage technology adoption in Sierra Leone. Cah Agric Vol. 24, pp. 47-55. doi : 10.1684/agr.2015.0733
Jeffries, P. and Jeger, M.J. (1990). The Biological Control of Postharvest Diseases of Fruit Biocontrol
Mogaji, T. S. and Fapetu, O. P. (2011) Development of an evaporative cooling system for the preservation of fresh vegetables, African Journal of Food Science Vol. 5(4), pp. 255 – 266,
Mogaji, T. S. Awolala, D. O. and Fapetu, O. P. (2013) Marketing performance and efficiency of evaporative preservation cooling system for fresh tomato marketing in Ondo State, Nigeria, African Journal of Agricultural Research Vol. 8(5), pp. 468-474
Olosunde, W. A., Igbeka, J.C. and Taiwo, O. O. (2009). Performance Evaluation of absorbent materials in Evaporative Cooling System for the Storage of Fruits and Vegetables International Journal of Food Engineering Volume 5, Issue 3
Opata, P. I., and Ogbonna, P. E. (2015) Storage profitability and effectiveness of storage methods in yield loss reduction in cocoyam in southeast Nigeria Africal Journal of Agricultural Research Vol. 10(49), pp. 4496-4504
Pinstrup-Andersen, P. (2009). Food security: Definition and measurement, Journal of Biomedicine and Life Sciences Vol.1(1), pp. 5-7.
Salunkhe, D.K., and. Kadam. S.S.(1995). Handbook of Fruit Science and Technology.New York: Dekker
Sunmonu M.O., Falua K.J., and David A.O. (2014). Development of a Low-Cost Refrigerator for Fruits and Vegetables Storage. International Journal of Basic and Applied Science, Vol. 02, pp. 85-93
Watada, A.E., Nathanee.P.K., and Minott, D.A. (1996). Factors Affecting Quality of Fresh-Cut Horticultural Products. Postharvest Biology Technology. Vol. 9, pp. 115-125
Wilson, L. G, Boyette, M.D. and Estes, E.A. (1995). Postharvest handling and cooling of fresh fruits, vegetables and flowers for small farms. Leaflets 800–804. North Carolina cooperative extension accessed on-line at: http://www.foodsafety.org/nc/nc1055.html, www.dualheating.com
Roura, S.J., Davidovich, L.A. and Valle, C.E. (2000). Quality Loss in Minimally Processed Swiss Chard Related to Amount of Damage Areas. Lebensmittel Wissenschaft Technol. Vol 33, pp. 53- 59.
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