The process of heat transfer
Summary :
Table of Contents
- Introduction
- What is direct contact heat transfer?
- The literature review
- Theory
- The materials and methods of the study
- Advantages and disadvantages
- Applications
- Conclusion
- References
Abstract
Direct contact heat transfer is a fundamental process by which heat transfer occurs in nature. It is used for the improvement of cooling or heating processes, in terms of characteristic time, compactness and energy costs. Direct contact heat transfer is potentially more efficient than conventional heat exchange because it eliminates performance reductions caused by fouling of the heat exchange surfaces and the associated energy losses. The major benefit lies in the dramatic increase of the specific contact area between the interacting fluids. A major difference between direct contact and conventional heat exchangers is that the former permit mass transfer as well as heat transfer between the two fluids. In chemical and process plants, mass transfer is usually the main objective and the heat transfer is a necessary but secondary feature. Direct contact devices designed specifically for mass transfer are widely used in industry, whereas direct contact heat exchangers, excepting cooling towers and condensers, are relatively rare.
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