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In order to build an efficient and energy-saving CO2 heat pump system and to improve the heat transfer efficiency of the gas cooler, a novel honeycomb gas cooler with a compact structure, high heat transfer efficiency, and high pressure-bearing capacity was proposed in our previous work. To clarify the components in the system that need further optimization and to improve its performance, an exergy analysis of a transcritical CO2 air-source heat pump system with the novel honeycomb gas cooler is studied in this paper. Based on the second law of thermodynamics, the exergy model of each componen...

Nowadays fossil fuels provide a significant majority of the world’s energy supply, and this situation is predicted to last for the following decades. However, utilization of fossil fuels also causes increasingly critical environmental problems, such as air pollution resulted from airborne particulate materials and greenhouse effects mainly brought about by higher carbon dioxide emissions. Therefore, it is of great importance to mitigate these issues related to fossil fuels, through technology development. Process assessment by energy and exergy analyses is an important tool to assess the fea...

This article looks at the development of an innovative sewage sludge drying method using a modified solar greenhouse. The paper was published in Clean Technologies.

Conventional coal gasification technologies have been widely used in chemical synthesis and power generation industries, and are regarded as clean technologies for utilising fossil fuel resources. Although it has not yet realised widespread commercial application, fluidised bed gasification technology has the potential for high energy utilisation efficiency if the high carbon content in discharged ash can be decreased. This article introduces a novel concept for an intensified gasification process, and provides a comprehensive energy and exergy analyses comparing this with a conventional fluid...