A continuing effort around the world to prevent environmental changes caused by global warming. As part of this effort, research is conducted on the improvement of energy efficiency. Increasing the energy efficiency can reduce the amount of fossil energy necessary to obtain an equivalent amount of energy, thereby reducing CO2 emissions. As part of this ongoing research, a system that can provide chilling, heating, and power generation with the use of a gas engine. While simultaneously providing the electricity required by the user. In addition, this system improves the energy efficiency by recovering the heat generated from each process. The system consists of a built-in heat pump for chilling and heating, and a generator for generating power. Depending on the user’s demands, thermal energy is obtained by connecting the gas engine to the heat pump.
The pressure difference created during the decompression process turns the turbine, and electricity is generated. It is a system that converts pressure energy into electricity without using raw materials. Although this is not yet classified as renewable energy in Korea, it is an outstanding system for generating power without CO2 emissions as it creates electrical energy using discarded energy. As the temperature of natural gas drops significantly during the decompression process, the temperature of the compressed gas needs to be somewhat increased before decompression to provide natural gas directly to households, or to turn the turbine. In existing methods, the natural gas temperature is increased with a gas boiler. The turbo expander generator (TEG) can reduce the energy loss by converting decompression energy into electricity, but there is no method to recover the heat energy to compensate the temperature drop during the decompression.
Reference
Lin, C.; Wu, W.; Wang, B.; Shahidehpour, M.; Zhang, B. Joint commitment of generation units and heat exchange stations for combined heat and power systems. IEEE Trans. Sustain. Energy 2020, 11, 1118–1127. [CrossRef]
Post time: Jun-13-2022