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Impact of low design ambient wet bulb, with Bengaluru as example.

Author(s) : SIMHA R. V.

Type of article: Article, Case study

Summary

Ambient design conditions indicated in ASHRAE Handbook are based on cumulative frequencies of parameter values involved. The ambient WBT value decided on this basis for Bengaluru is about 19°C. This is to be compared with WBTs of about 25°C that have been in use for several decades. The consideration involved in arriving at a design WBT, viz. using cumulative frequency data, impact of selecting low WBTs and plant performance at low WB depressions on air conditioning and evaporative cooling systems have been analyzed and reviewed. The study is based on WeDCo data - chiefly, the hourly values of parameters of interest. The study recommends use of 23-24°C for Bengaluru. Recommendations include study of differences between traditionally used design WBT values and ASHRAE/WeDCo values for other stations also like Mumbai, Pune, Kolkata, Hyderabad and Chennai - where differences are found to be significant. The major role that ISHRAE should play in tackling this issue has been emphasized.

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Format PDF

Pages: 34-40

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Details

  • Original title: Impact of low design ambient wet bulb, with Bengaluru as example.
  • Record ID : 30021658
  • Languages: English
  • Source: Air Conditioning and Refrigeration Journal - vol. 19 - n. 4
  • Publication date: 2016/07

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