Witt is a vice president with HSMM, an AECOM company, where he also serves as chief mechanical engineer. An honors graduate in mechanical engineering from the University of Virginia, Witt has more than 29 years of experience in the design of complex mechanical systems for both new structures and renovation of older facilities. He is a member of ASHRAE, ASME, and SFPE, and has also written a number of articles for professional publications and journals.
Chiller plant retrofits are common. Reliability issues created by using water brought in from the Tidal Basin are not. An existing system involving a special vacuum priming system and a chilled-water jockey pump isn’t exactly commonplace, either. Then you have the chemical treatment concerns since the conditioned space houses priceless artwork. Return with us to the National Gallery of Art to see an interesting design for a project framed by a number of unusual restrictions.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.