• Pravin Tiwade
• Dr. Nilesh Diwakar

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 will be changed from a flat spiral to a conical frustrum .The geometry of the tubes plays a significant part in design and development of the heat exchanger. Paper 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 approach in the design and development is to deal with the problem of fouling at two levels as proposed in this paper, namely selection of an suitable material to prevent fouling and scaling issues and secondly to add a innovative geometry variation in the form of pitch augmentation where in the flat shape geometry of the spiral can be converted to an to a conical frustum.

Fluropolymer, Spiral tube in tube heat exchanger, heat transfer capabilities, corrosion resistance

"DESIGN ANALYSIS OF FLUROPOLYMER SPIRAL TUBE HEAT EXCHANGER WITH VARIABLE PITCH CONICAL FRUSTRUM GEOMETRY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.538-545, March-2019, Available :http://www.jetir.org/papers/JETIR1903L72.pdf

"DESIGN ANALYSIS OF FLUROPOLYMER SPIRAL TUBE HEAT EXCHANGER WITH VARIABLE PITCH CONICAL FRUSTRUM GEOMETRY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp538-545, March-2019, Available at : http://www.jetir.org/papers/JETIR1903L72.pdf