Results for 2EHT tubes published at International Communications in Heat and Mass Transfer 80 (2017) 30–40.
An experimental investigation of R22 and R410A condensation outside the 1EHT and herringbone tubes have been published online at:
http://link.springer.com/article/10.1007/s00231-018-2406-3
The herringbone tube has a fin root diameter of 11.43 mm, a helical angle of 21.3 °, 48 fins with a fin height of 0.262 mm and an apex angle of 36 °; the 1EHT tube has an inner diameter of 11.5 mm with a dimple enhancement; while the smooth tube has an inner diameter of 11.43 mm; and all the tubes have an outer diameter of 12.7 mm. Experiments were performed for a constant saturation temperature of 45°C; with a constant inlet vapor quality of 0.8 and a constant outlet vapor quality of 0.1; for a mass flux ranging from 5 kg/(m2 s) to 250 kg/(m2 s).
The SPIL 2017 Conference is a Process Engineering Conference where presenters provide unique insights regarding important areas of Enhancement, Process Integration and Sustainability.
Current energy/environmental demands coupled with energy resources that are depleting at an alarming rate, creates a serious economic / environmental situation with energy and environmental costs becoming an important consideration in the cost of any process.
Vipertex® 1EHT Enhanced Heat Transfer Tubes provide the most cost effective and environmentally friendly means to advance the effectiveness of high performance thermal systems. Cost savings and environmental savings of using these tubes were discussed.
Several Case Studies of Heat Exchangers were presented that provide overdesigns of more than 45% (when compared to smooth tube designs), producing overdesigns with a payback (for the cost of the enhanced bundle) of a few months. Additional energy recovery can be achieved, providing savings in total costs and emissions. One Smooth Tube Falling Film Heat Exchanger Design that was discussed produced more CO2 emissions (smooth tube design produced more than 1440 metric tons per year) than a Vipertex® 1EHT Falling Film Heat Exchanger would produce. Additionally, in a comparison of the three year total exchanger cost (Purchase + Install + Operations/Recovery) of a smooth tube exchanger to a similar size 1EHT exchanger; calculations show that the 1EHT total cost is more than 50% less than a smooth tube design.
