Abstract
SUMMARY To improve the economic performance of an organic Rankine cycle (ORC) plant and oilfields in the high water cut period, petroleum-associated water was used as the heat source. Based on this idea, a novel system consisting of six subsystems was proposed. Because of a low heat demand for oil gathering and transportation (OGT) in summer, excess heat was used to drive absorption chillers (ACs), the auxiliary cold source for the ORC in summer. Numerical calculations were performed to evaluate system performances. Results indicate that R601a is preferable. The AC can either serve buildings for air conditioning or further reduce the condensing temperature, and no original geothermal water bypassing is advisable for the AC. OGT can save about 6800 tons of oil, and heating systems can serve more than 258 000 m2 of buildings for heating in winter and over 47 300 people for domestic hot water supply in summer. More importantly, up to 32 000 tons of oil can also be recovered each year. Copyright © 2013 John Wiley & Sons, Ltd.
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