Energy efficiency assessment of fixed asset investment projects – A case study of a Shenzhen combined-cycle power plant

Abstract

The assessment of fixed asset investment projects of energy conservation is based on a scientific and systematic approach to analyze the energy production, consumption and management and helps to analyze whether the use of energy is in line with the national and local industrial policies and whether the project design meets China׳s energy saving design outlines and industry standards. The level of energy consumption is compared to the domestic and international advanced levels regarding the project energy use and process analysis, in all aspects of energy production and energy consumption, taking technically feasible, economically reasonable and environmentally and socially responsible measures and effective and rational use of energy, to reduce consumption and losses and to stop waste, while investigating if the project has a certain advanced and rational use of energy. This study provides a full consideration of whether there is a scientific and rational use of energy to avoid low-level repetition construction, to avoid blind expansion trends, and to promote the upgrading of industrial structure. This paper takes as an example a gas turbine power plant in Shenzhen as an assessment case study of the potential energy savings. The project is expected to have an annual power supply of 37.89×108kWh and an annual heat supply of 5.43×104GJ. The consumption of power generation in tons of coal equivalent units is expected to reach 208g per kWh. The comprehensive annual average thermal efficiency is 77.16%, and the average heat-to-power ratio is 40.65%. These technical indicators are thought to be one of the best compared to similar level projects in the country.