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U.S. Department of Energy
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DHW modeling: System sizing and selection criteria. A study of baseloads and seasonal efficiency, Phase 2: Final report

Technical Report ·
OSTI ID:698675
The project`s objective was to quantify the domestic hot water (DHW) consumption and demand in a sample of New York City multifamily buildings. Specifically, the objectives were to develop and analyze a comprehensive set of multifamily building operational energy performance data; and, to develop, specifications for proper sizing of DHW generation equipment. The project used computer models to determine the most energy-efficient and cost-effective DHW systems for small-to-moderately-sized multi-family buildings. The project used models of various types of DHW supply systems such as: direct-fired storage tank, tankless coil, separate DHW boiler with storage, and direct-fired instantaneous. Optimization of both system sizing and minimum annual energy consumption was evaluated based on selection of instantaneous, storage, or combined instantaneous and storage system requirements.
Research Organization:
Energy Management and Research Associates, Brooklyn, NY (United States); New York State Energy Research and Development Authority, Albany, NY (United States)
Sponsoring Organization:
New York State Energy Research and Development Authority, Albany, NY (United States)
OSTI ID:
698675
Report Number(s):
PB--99-147076/XAB
Country of Publication:
United States
Language:
English