A review on opportunities for the development of heat pump drying systems in South Africa

Authors

  • Thomas Kivevele Department of Mechanical Engineering, Tshwane University of Technology, Pretoria, South Africa
  • Zhongjie Huan Department of Mechanical Engineering, Tshwane University of Technology, Pretoria, South Africa

DOI:

https://doi.org/10.1590/sajs.2014/20130236

Keywords:

heat pump, drying, specific moisture extraction rate, coefficient of performance, energy efficiency

Abstract

Recently, it has been discovered that heat pump drying is an efficient method of drying for drying industries. Heat pumps deliver more heat during the drying process than the work input to the compressor. Heat pump drying is a more advanced method than the traditional South African industrial and agricultural drying methods, such as direct/indirect sunlight, wood burning, fossil fuel burning, electrical heating and diesel engine heating. Heat pump dryers provide high energy efficiency with controllable temperature, air flow and air humidity and have significant energy-saving potential. In the last decade the market for heat pump systems for water heating and space cooling/heating has grown in South Africa, but the development of heat pumps for industrial and agricultural drying is very slow. As a result of high increases in fossil fuel prices and electricity in South Africa, as well as the problem of COemissions, green energy, energy saving and energy efficiency are imperative. The development of heat pump drying systems in South Africa is an efficient way to solve energy problems in drying applications as this technology is still in its infancy. We review studies on heat pump drying and compare the methods therein with the most common methods of drying in South Africa.

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Published

2014-05-28

How to Cite

1.
Kivevele T, Huan Z. A review on opportunities for the development of heat pump drying systems in South Africa. S. Afr. J. Sci. [Internet]. 2014 May 28 [cited 2021 Sep. 22];110(5/6):11. Available from: https://sajs.co.za/article/view/4171