Ever had a need or interest to learn about the heat exchangers? Searched everywhere yet cannot find the perfect article or book? What if I say there is a book with more than 200 topics and graphs and diagrams clearly explains you all the concepts of heat exchanger thoroughly? Cannot believe? Yes there is a book published by our Kitab Writing Publication by the author Dr. Pravin C Tiwade, on the name Efficacy of Fluoro-Polymer spiral tube in tube hear exchanger. To understand the book and the quality of content better we have added the abstract of the book below.
Heat exchangers used in process industry, chemical industry applications require that there is no contamination and lesser fouling need of chemically inert and non-corrosive heat exchangers, although the conventional heat exchangers made from copper, aluminium and other metallic materials seldom prove useful in these cases. Polymeric materials heat exchangers although chemically inert, but lack the thermal capabilities suitable to heat exchangers. The only polymeric heat exchangers to offer modest heat transfer abilities are the fluro-polymer heat exchangers. The geometry of the heat exchanger plays a vital role in determining the heat transfer capabilities and also resistance to fouling the spiral tube in tube heat exchangers offer the best compactness although the pumping power required is slightly on the higher side. The spiral tube in tube heat exchanger design is a challenge to manufacture so also difficult to clean over time for maintenance. The problem of fouling can be dealt as proposed in our project , namely to prevent scaling and fouling by addition of variable pitch where in the shape geometry of the spiral has be changed by varying the pitch of the conical spiral .The geometry of the tubes plays a significant part in design and development of the heat exchanger. Thesis work discusses the development of such heat exchanger where in the fluro polymer tube is wound in a spiral shape and hot fluid is always passed from inside of spiral to outside of spiral , but path of the cold fluid be changed to attain the parallel flow or counter flow configuration. The theoretical design of the outer tube of spiral was done in 10 mm , 15mm, 20mm, 25mm, 30mm in both parallel and counter flow configuration for both outer and inner tubes and the values of Hoope’s stress and Longitudinal stress were found to be well below the permissible limit indicating the outer tube is safe in all configurations under the given system pressure . Similarly combined thermal and structural analysis of the outer and inner tubes was conducted using Anises workbench 16.0 and the values of maximum heat flux were determined and analytical stress were found to be well below the permissible limit indicating the outer tube and outer is safe in all configurations under the given system pressure. Test and trial was conducted on the heat exchanger in parallel and counter flow configurations , the test determined the Heat capacity ratio (Cr) 0.4532 at 8.91 kg/hr flow rate , NTU 0.7143 , Effectiveness () 0.4781, Heat transfer (Q) 459.71 watt and Overall heat transfer (U) 110.04 w/m2k at mass flow rate of 12.87 kg/hr in the counter flow configuration with 25 mm pitch indicating that the best configuration being counter flow and the best pitch being 25 mm for best thermal performance from the heat exchanger. The fouling of heat exchanger is another prominent issue addressed in thesis through optimization of mass flow rate and change in pitch. The heat exchanger is provided with variable pitch changed to 30 , 25, 20 mm where higher heat transfer rates are observed and the mass flow rates of hot water changed to 11.38 , 11.98 and 12.87 kg/hr and the optimization of fouling factor has been done in Minitab 17 (Taguchi
Design of experiment) using L9 orthogonal array. The Optimization of pitch and mass flow rate for minimal fouling in the counter flow configuration suggest that 25 mm pitch and 11.39 kg/hr suggesting that these conditions if adopted the heat exchanger will operate with minimum fouling offering better service life and better heat transfer rates for longer durations in the counter flow configuration. Similarly the optimization of pitch and mass flow rate for minimal fouling in the parallel flow configuration suggest that 25 mm pitch and 12.87 kg/hr is ideal in obtaining the minimum fouling factors , suggesting that these conditions if adopted the heat exchanger will operate with minimum fouling offering better service life and better heat transfer rates for longer durations in the parallel flow configuration.
Then why more search or wait? Grab your copy of this amazing book soon! For more such amazing books keep tracking the publication because it never fails to surprise you!
