Why does a scratched surface act better boiling surface in a Heat Exchanger as compared to a smooth surface?
Why does a scratched surface act better boiling surface in a Heat Exchanger as compared to a smooth surface? The first detailed boiling study was conducted by Nukiyama in 1934 when he plotted the boiling curve showing the relationship between heat and temperature. The curve is known as the Nukiyama boiling curve. Figure 1 shows […]
Shell Side Direct Expansion Evaporation (SX) of Ammonia on a 3-D structured surface Tube Bundle with exit superheat effect
Shell side direct expansion evaporation (SX) of ammonia on a 3-D structured surface tube bundle with exit superheat effect Ammonia is an environmentally safe and low-cost natural refrigerant which has been in use for more than a century. The Kigali amendment phase-out of HFCs has further strengthened the case for ammonia. The limitations of ammonia […]
Ultra Low Charge Vertical Shell and Tube Heat Exchanger
A Shell and Tube Vertical Heat Exchanger (Chiller) have been developed that has smaller footprint than a Plate and Frame Heat Exchanger. The idea behind it is to force the boiling refrigerant such as Ammonia, Carbon Dioxide or any other refrigerant to a thin boiling regime thus resulting in higher heat transfer. The Chiller does […]