The Potential of Diwesel Cycle and Gas Turbine Cogeneration in the Thai Industrial Manufacturing Sector

Abstract

This study assesses the potential of diesel and gas turbine cogeneration in Thai Industrial Manufacturing Sector, numbering more than 27,000 factories in 1994.

The appropriate system for each industry has been analyzed technically and financially according to heat and electrical demand, operating hours of each industry, together with data on cogeneration costs and other economic parameters.

Over 500 different cases have been investigated with natural gas, heavy oil, and distilled oil being assumed as cogeneration fuels.

Two methods have been adopted to assess the potential industrial application of cogeneration: First, a nomogram was made from the incremental heat rate (IHR) and the generated electricity cost with different kinds of fuel, considering the internal rate of return (IRR) for each fuel, based on a minimum expectation of a 25% return. Using the stand alone system calculations were based on the thermal-matched method.

Secondly, mixed-integer linear programming was used, considering the thermal-match and electrical-match to find the maximum benefit. In this method there are auxiliary boilers to supply supplementary heat and reduce cost.