Exhaust air energy recovery system for electrical power generation in future green cities

Wen Tong Chong, Sin Chew Poh, Ahmad Fazlizan Abdullah, Sook Yee Yip, Mei Hyie Koay, Wooi Ping Hew

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This paper investigates a technology-driven solution to supply a portion of energy demand in future green cities. An idea on harnessing unnatural wind resources for electricity is presented. Two vertical axis wind turbines with an enclosure are mounted above a cooling tower to recover part of the energy from the exhaust air. Guide-vanes are designed to create a venturi effect and guide the wind before it interacts with the turbine blades. Diffuser-plates help to draw more wind and accelerate the exhaust airflow. Safety concerns that may result from blade failure are minimized by the design of the enclosure. From the laboratory test and field test results, there is no significant difference in the current consumption of the fan motor with the installation of the wind turbines. The integration of the enclosure has shown an improvement on the turbine's rotational speed which is 30.4% higher. The electricity generated from this system can be fed into the electricity grid. For 3000 units of cooling tower (2 m outlet diameter powered by a 7.5 kW fan motor and operated for 16 hours/day), 13% of the energy to power the fan motor is expected to be recovered from this system which equals 17.5 GWh/year.

Original languageEnglish
Pages (from-to)1029-1035
Number of pages7
JournalInternational Journal of Precision Engineering and Manufacturing
Volume14
Issue number6
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes

Fingerprint

Enclosures
Fans
Power generation
Electricity
Cooling towers
Recovery
Wind turbines
Turbines
Air
Turbomachine blades

Keywords

  • Cooling tower
  • Energy recovery
  • Green technology
  • Renewable energy
  • Urban wind energy
  • Wind turbine

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Exhaust air energy recovery system for electrical power generation in future green cities. / Chong, Wen Tong; Poh, Sin Chew; Abdullah, Ahmad Fazlizan; Yip, Sook Yee; Koay, Mei Hyie; Hew, Wooi Ping.

In: International Journal of Precision Engineering and Manufacturing, Vol. 14, No. 6, 01.12.2013, p. 1029-1035.

Research output: Contribution to journalArticle

Chong, Wen Tong ; Poh, Sin Chew ; Abdullah, Ahmad Fazlizan ; Yip, Sook Yee ; Koay, Mei Hyie ; Hew, Wooi Ping. / Exhaust air energy recovery system for electrical power generation in future green cities. In: International Journal of Precision Engineering and Manufacturing. 2013 ; Vol. 14, No. 6. pp. 1029-1035.
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