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Predictive Optimization in Chilled Water Plants

Summary Most marketed approaches to chilled water plant optimization use independent hardware to reduce plant energy use. This presentation demonstrates how predictive optimization yields similar performance results without the added hardware. Predictive optimization makes better use of...


Library Entry
DES Buildout to Support 100 Year Old Campus Expansion

Summary St. Elizabeths, a 100 year old former mental health hospital in Washington DC, is being remodeled into the Homeland Security Headquarters. The new CUP includes a 9100 ton chiller plant, 1500 MBH HHW plant and 21 MW of electrical generation – built underground to preserve historic...


Library Entry
Implementation of a Biomass CHP System at a US Federal Hospital in Battle Creek, Michigan

Speakers Phil Beaty, Nexterra Systems Joe Witchger, HGA Architects #CampusEnergyConference #2014 #ConferenceProceeding #CHP #HGAArchitectsandEngineers #Biomass #Michigan #BattleCreek #Gasification

1B.3_Beaty_ Witchger.pdf

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Considerations for a District Energy System based on Municipal Solid Waste (MSW), Case Study: North Loop District Energy System

Summary The Master Plan examines the technical and economic feasibility for a modern sustainable district energy system based on waste heat recovery from a nearby MSW power plant and expansion of existing NRG Minneapolis district energy system to serve heating and cooling needs of approximately...

3A.1_Dehbashi, Witchger.pdf

Library Entry
University of Virginia: Energy and Utility Master Plan and Cogeneration Study

Summary In response to campus growth, the existing campus utility systems were expanded and extended to the point where additional planning was necessary to address not only the future growth plans of the university, but also more stringent environmental regulations, energy supply challenges,...

1A.3_Callihan, Witchger.pdf

Library Entry
A Waste to Energy Cogeneration System Capacity Assessment & Master Planning

Summary This presentation takes a look at the Olmsted Waste to Energy Plan in Rochester, Minnesota as a case study for waste to energy campus master planning and system design. Speakers Ehsan Dehbashi, HGA Architects & Engineers Joe Witchger, HGA Architects & Engineers ...


Library Entry
Hybridized Variable Speed Chilled Water Pumping Configuration using Constant Speed Pumps

Summary Converting from primary/ secondary pumping to variable primary pumping is a common approach in chilled water plant renovations. For ANW Hospital, the solution to implement a hybridized system – leaving existing primary pumps at constant speed while converting secondary pumps to variable...