Effect of operation strategies on the economic and environmental performance of a micro gas turbine trigeneration system in a tropical region

• Published in: Energy (Oxford) 2016-02, Vol.97, p.262-272
• Main Authors: Basrawi, Firdaus, Ibrahim, Thamir K., Habib, Khairul, Yamada, Takanobu
• Format: Article
• Language: English
• Subjects: Economic; Economic conditions; Economics; Emissions; Emissions control; Environment management; Gas turbines; Micro gas turbine; Operation strategy; Reduction; Strategy; Trigeneration system; Tropical regions
• ISSN: 0360-5442
• DOI: 10.1016/j.energy.2015.12.117

This study investigates the effect of employment of different operation strategies on the economic and environmental performance of a micro gas turbine trigeneration system (MGT-TGS). The MGT-TGS covers power, heating and cooling load of a selected building in a tropical region. The prime movers used were MGTs with electrical output capacity of 30 kW and 65 kW. Four operation strategies; Power-Match, Heat-Match, Mix-Match, and Base-Load were examined. The Net Present Value and Emissions Reduction Index throughout the life cycle of the MGTs were calculated. It was found that MGT-TGS can only generate positive NPV (Net Present Value) at the end of 25 years life time under unsubsidized electricity price. Mix-Match and Power-Match operation strategies can generate positive NPV because the systems can generate more electricity. However, these operation strategies cannot reduce emissions especially CO2 and CO when they were compared to a CCGT (Combined Cycle Gas Turbine). Base-Load is the only operation strategy that can reduce all emissions even when it is compared to a CCGT. When the economic and environmental performance is fairly considered using CPERI (Cost Per Emissions Reduction Index), Mix-Match is the optimum solution because it can generate CPERI of US$16.0–92,407, based on NPV. •Effect of operation strategy on the economic and environmental performance of MGT-TGS was investigated.•Mix-match and Power-match operation strategies can generate positive Net Profit.•Only base-load operation strategy can reduce emissions even when it is compared to CCGT.•Mix-match is the best operation strategy when economic and environmental performance were considered.•Cost Per Emissions Reduction Index shows that Mix-match can generate 16.0–92,407 US$/kg-emissions reduced.