Gas Water Heater Energy Losses

Date Published
01/2009
Publication Type
Report
Authors
LBL Report Number
LBNL-4826E
Abstract

A forty gallon residential gas-fired storage water heater was modeled under Department of Energy test procedure conditions using the TANK simulation program. The purpose was to determine heat flows in a typical residential storage water heater that meets the current minimum efficiency standards. Modeling showed that, without considering a condensing water heater design, the greatest potential efficiency gains can be made by reducing flue losses during the non-firing, non-recovery mode, i.e., during standby mode. The stack losses while in standby mode account for about 43% of heat losses (not including the energy added to deliver hot water), and 17% if hot water energy is included.

Year of Publication
2009
Pagination
20
Institution
Lawrence Berkeley National Laboratory
City
Berkeley
ISBN Number
LBNL-4826E
Organizations
Research Areas
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