Title of article :
New test method for gas boosters with domestic solar water heaters
Author/Authors :
Grant Bourke ?، نويسنده , , Pradeep Bansal، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2012
Abstract :
This paper describes a new test method for determining the annual energy consumption of a domestic solar water heater incorporating
an in-series gas booster on the outlet of the storage vessel to provide auxiliary heating. The test method accounts for the variation in
performance of the gas booster as its incoming water temperature and flow rate varies. Systems incorporating both standard and condensing
gas instantaneous water heaters are evaluated. An experimental method was developed to characterize the steady-state performance
of the gas booster and the resulting performance equation incorporated in a TRNSYS model of the solar water heater to assess
gas consumption. Using this method, annual gas consumption is found to be 15% higher than calculated by a current standard where gas
booster efficiency is held constant regardless of water flow rate or temperature. The condensing gas booster tested was found to maintain
a significant performance advantage over the non-condensing model over a range of solar water heaters.
2011 Elsevier Ltd. All rights reserved
Keywords :
solar water heater , Domestic water heater , Residential water heater , Tankless , Hybrid water heater , Gas instantaneous
Journal title :
Solar Energy
Journal title :
Solar Energy