MASSACHUSETTS INSTITUTE OF TECHNOLOGY (MIT) Case Study
MIT Tests New Energy Valve Technology at Charles Hayden Library And Reaps the Rewards of Higher Delta-T!
MIT Tests New Energy Valve Technology at Charles Hayden Library and Reaps the Rewards of Higher Delta-T!
Engineers at MIT were well aware that low delta-T syndrome problems were a significant energy cost to the campus. Before the retrofit, the total average delta-t for the coils at the Hayden Library was 6.15°F, based on metering data taken from the period of August 9, 2010 thru October 9, 2010. After the retrofit, the building was metered for the exact same calendar period (August 9, 2010 – October 9) in 2011. The average delta-T had risen from 6.15°F to 12.14°F, reducing chilled water flow to the building by 49%. This percentage is weather normalized, meaning that it has been
adjusted for variances in outdoor temperature that occurred during the metered period. Thus, the 49% is an exact and accurate representation of the overall flow reduction. Read on to comprehend the whole story.
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