Energy saving and payback period for retrofitting air conditioning systems in Taiwan

Chung Yi Chang, Hsien Te Lin, Chun Ta Tzeng, Kuan Hsiung Yang, Yew Khoy Chuah, Ming Chin Ho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In Taiwan, AC systems in buildings with central air conditioning account for over 45% of the total electricity consumed. Inefficient and poorly designed AC systems in existing buildings waste considerable amounts of money and energy. Therefore, retrofitting AC systems has become a widely adopted strategy to save energy while maintaining a comfortable indoor thermal environment. This study analyzes the potential energy savings and payback period of retrofitting AC systems in public buildings. In addition to the required Building Energy Management System (BEMS), several measures are introduced to reduce energy consumption during retrofitting. The main measures include testing, adjusting, and balancing (TAB) of existing AC systems; replacing over-designed chillers with chillers with smaller capacity; installing frequency conversion in original systems, such that they become variable water volume (VWV) and variable air volume (VAV) systems; and utilizing CO 2 concentration control and pre-cooling air systems. Based on analytical results, we conclude that AC system retrofitting can reduce total energy usage by 11.75%, while the average payback period for a retrofit project is 4.71 years, demonstrating that AC system retrofitting in Taiwan is economically sound.

Original languageEnglish
Title of host publicationFrontiers of Manufacturing and Design Science II
Pages2850-2854
Number of pages5
DOIs
Publication statusPublished - 2012
Event2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011 - Taichung, Taiwan
Duration: 2011 Dec 112011 Dec 13

Publication series

NameApplied Mechanics and Materials
Volume121-126
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011
CountryTaiwan
CityTaichung
Period11-12-1111-12-13

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Energy saving and payback period for retrofitting air conditioning systems in Taiwan'. Together they form a unique fingerprint.

Cite this