Simulation Study on the Recondensation of Volatile Organic Compounds via Heat Exchanger Units

This research aims to simulate a promising method to minimize the Volatile Organic Compounds (VOCs) generation through heat exchange system under a high oil flow rate of 5 l/min for 60 minutes. The capability of the heat exchanger unit (HEU) was maximized via the optimization of 1) heat sink material – brass, copper and aluminum 2) pitch ratio 3) heat sink shape and alignment – circle, triangle, square and hexagonal / In-lined and Staggered fins 4) coolant temperature. Superlative conditions were found with these conditions – copper used as a heat sink, circle heat sink media selected as a heat sink shape and each heat sink unit positioned in staggered fashion and 1°C coolant was used. Additionally, the relevancy of the optimized parameters was ordered as follows – pitch ratio, coolant, fin shape & tube alignment and material of selection. At this juncture, the most optimal operating condition of the HEU could function at 82% efficiency resulting in a 13.2% recondensation of VOCs (40°C) back into liquid state. When actualized, this proposed system would be capable of regulating VOC level within US Environmental Protection Agency (EPA) Compendium Method (TO-14A/TO-15) which would equate to a better environment, safety standard and petrol retention rate during the transportation.