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RESIDENTIAL DRAIN WATER HEAT RECOVERY SYSTEMS: MODELING, ANALYSIS, AND IMPLEMENTATION

Journal of Green Building 2010年第3期5卷 85-94页

作者： Scott Bartkowiak ryan fisk Andrew Funk Jonathan Hair Steven J.Skerlos Mechanical Engineering University of Michigan Tecat Engineering Inc.Ann ArborMI Mechanical Engineering Oakland University Bolton Conductive Systems Walled LakeMI

This paper describes the design and environmental improvements that can be achieved using drain water heat recovery systems(DWHR)to reduce the energy consumption associated with residential *** systems transfer heat from hot drain water to the shower’s incoming cold water stream,thus reducing the demand on the hot water *** are various DWHR systems available that differ in heat exchanger type,cost,and *** article focuses on designing a flat plate and gravity fed heat exchangers for a range of residential showering *** is useful since there currently is no peer-reviewed published data on the effectiveness of DWHR,nor is there published research considering the emissions reductions that can be achieved with realistic DWHR *** governing equations for heat exchangers are used to model empirical data and to derive implementation recommendations for DWHR *** model is validated using a prototype flat plate heat exchanger and test stand under varying flow rates and temperatures.A Monte Carlo simulation of the results showed that DWHR could save an average$74 a year for homes with natural gas water heaters and$160 a year for homes with electric water *** corresponds to 0.3 metric tons and 1.5 metric tons of CO_(2) offset per home per year for natural gas and electric water heaters,*** results are compiled and organized into a software program that allows consumers to input their household showering habits and location to get an estimate of their CO_(2),energy,and cost savings to determine if they should install a DWHR system.

关键词： install drain cost

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