Improving Indoor Environmental Quality And Energy Performance OfModular Classroom HVAC Systems

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Description

The factory-built relocatable classroom (RC) is a dominant force in the school facility construction industry in the US and elsewhere. it is estimated that there are approximately 650,000 RCs currently occupied in the US, housing about 16 million students. RCs receive public attention due to complaints about poor indoor environmental quality (IEQ). Both measured data and anecdotal evidence in California have suggested excessive acoustical noise from heating, ventilation, and air conditioning (HVAC) equipment as a central factor leading to degraded IEQ. In the US, RCs are typically equipped with unitary exterior wall-mount HVAC systems, and interior acoustical noise due to ... continued below

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Apte, Michael G.; Spears, Michael; Lai, Chi-Ming & Shendell, Derek G. March 1, 2005.

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Description

The factory-built relocatable classroom (RC) is a dominant force in the school facility construction industry in the US and elsewhere. it is estimated that there are approximately 650,000 RCs currently occupied in the US, housing about 16 million students. RCs receive public attention due to complaints about poor indoor environmental quality (IEQ). Both measured data and anecdotal evidence in California have suggested excessive acoustical noise from heating, ventilation, and air conditioning (HVAC) equipment as a central factor leading to degraded IEQ. In the US, RCs are typically equipped with unitary exterior wall-mount HVAC systems, and interior acoustical noise due to structural and airborne transmission can reach levels of about 58dB(A) with compressor cycling, under unoccupied conditions. Due to these noise levels, teachers often simply choose to turn off the HVAC, leading to inadequate ventilation, as well as poor thermal conditioning, and thus to poor indoor air quality. Elevated levels of carbon dioxide and volatile organic compounds including formaldehyde are common. They discuss the acoustic component of the efforts to develop and test energy efficient HVAC systems that address the ventilation, controls, and acoustic requirements necessary to ensure high quality indoor environments in RCs.

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  • Sustainable Building 2005 - Tokyo, Tokyo, Japan,September 27-29, 2005

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  • Report No.: LBNL--57277
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 859930
  • Archival Resource Key: ark:/67531/metadc780585

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  • March 1, 2005

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 1, 2016, 7:38 p.m.

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Apte, Michael G.; Spears, Michael; Lai, Chi-Ming & Shendell, Derek G. Improving Indoor Environmental Quality And Energy Performance OfModular Classroom HVAC Systems, article, March 1, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc780585/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.