Environmental Impact Evaluation and Economy Analysis of Air-Conditioning Cold and Heat Source Based on TEWI Index

Abstract:

TEWI (total equivalent warming impact) index, a comparatively scientific method to evaluate the environmental impact of air-conditioning cold and heat source, is introduced. Taking some engineering in Hunan Province for example, the TEWI analysis was performed on the environmental impact assessment of four air-conditioning cold and heat source plans. Also the first investment and energy consumption were analyzed. The results indicate that: water loop heat pump unit, due to investment recovery period with only 2.9 years and carbon emission reduction up to 22.68%, has significant economy and environmental protection, which is followed by water source heat pump; the screw chilled water units plus gas boiler is poor. Gas direct-fired machine has certain economic advantage, but its environmental performance is general. Among four schemes, the proportion of indirect effects of CO₂ emissions from fossil fuels used to generate energy to operate the equipment throughout its lifetime are all larger, respectively is 95.1%, 95.2%, 100% and 89.9%. It fully showed the importance of developing clean and renewable energy, reducing energy consumption and increasing performance coefficient of refrigeration and air conditioning device.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 1551-1557
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.1551
• Online since: September 2013
• Authors: Chang Rong Liu*, Han Qing Wang, Zhi Yong Wang, Tian Yu Zhang
• Keywords: Air-Conditioning Cold and Heat Source, Economy, Environmental Impact (EI), Total Equivalent Warming Impact (TEWI)

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