Introduction Compact heat exchanger can be characterized by its high ‘area density’ this means that it has a high ratio of heat transfer surface to heat exchanger volume. So Compact heat exchange is characterized by high heat transfer surface-area to volume ratios and high heat transfer coefficients compared to other exchanger types. A heat exchanger having a surface area density greater than about 700 m2/m3 for a gas is quite arbitrarily referred to as a compact heat exchanger. Fig 1. Image of Compact Heat Exchanger https://www.gces-inc.com/products/compact-heat-exchangers/ The heat transfer surface area is increased by fins to increase the surface area per unit volume and there are many variations available Compact heat exchangers are not a new technology; there is a continuous need to produce innovative designs to suit market requirements. Such designs are more efficient in terms of heat transfer although fouling and pressure are important design considerations that make comp...