First International Seminar on ORC Power Systems

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tag APPLICATION OF AN ORGANIC RANKINE CYCLE FOR RECOVERY OF LOW-GRADE WASTE HEAT IN A (WET) BIOMASS SUPERCRITICAL WATER GASIFICATION SYSTEM
Wijittra Hongsiri, Wiebren de Jong

Session: Poster Session and Sponsors Exhibition
Session starts: Thursday 22 September, 14:00

Wijittra Hongsiri ()
Wiebren de Jong ()

Abstract:
Green platform chemicals and biofuels(s) can be produced from wet biomass pretreatment integrated with supercritical water gasification. This is a novel biorefinery concept. However, the utilization of low grade heat to improve economics has been a challenge. This article describes a process model and simulations in which an Organic Rankine Cycle (ORC) was combined with Supercritical water gasification (SCWG) system. The working fluid used in this study is CO2. It has many advantages, low cost, low toxicity, is non-flammable and has no environmental impact. In this modeling, water temperature in the range of 170 - 200 ºC and a flow of 7200 kg/hr was used as the low-grade heat source. CO2 is biomass derived in the same process which can be produced about 1800 kg/hr. Aspen PlusTM process modeling software is used to model this system. The economics and efficiency of the process are evaluated.