The continuing enhancement of energy recovery cycles that exploit low grade energy resources requires an efficient heat absorption and rejection system. Implementation of a conventional surface type heat exchanger, evaporator or condenser has many disadvantages. The low efficiency, fouling, corrosion problems, high cost and high heat transfer resistance are the most important shortcomings that emerge as a result of the metallic barriers involved. On the other hand, a direct contact heat transfer device offers a high heat transfer area and reduces or eliminates fouling and corrosion problems. They can also work with very low temperature differences and subsequently can enhance the cycle efficiency. Direct contact heat exchangers clearly have many advantages over surface type heat exchangers and can also be efficiently used in places where the surface heat exchanger cannot be.Accordingly, direct contact heat exchanger can be found in different applications, such as water desalination and power generation from geothermal brine. Water desalination utilising direct contact heat exchangers can be achieved by two general methods: direct contact freezing-melting and direct contact evaporation- condensation. The former is based on the ability to remove water from a solution by freezing it out as crystalline ice. The ice or crystal should contain only pure water; therefore the partial freezing separates the fresh water from brine. The ice melts at another stage to produce distilled water. Direct contact freezing exploits the concept o...
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Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.
Climate change Research Articles published between Aug 08, 2022 to Aug 14, 2022
Aug 15, 2022
Articles Included: 5
Introduction: There is no consensus on the policies that should be seen as implicitly pricing carbon (see World Bank (2019a) for a discussion). The OE...Read More
Gender Equality Research Articles published between Aug 08, 2022 to Aug 14, 2022
Aug 15, 2022
Articles Included: 4
I would like to thank Anna Khakee, Federica Zardo and Ragnar Weilandt for their very useful comments as well as the participants of the workshop of 21...Read More
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