6Pescatore P,Roth K W,James B.Condensing natural gas water heaters[J].ASHRAE Journal,2004,46(2):51 -52.
7De Winter F.Energy consumption impacts of backup gas firing efficiency,tank standby losses,and pilot tlame energy consumption in" two-tank" solar-gas DHW systems,subjected to the typical DHW consumption of the single family home[J].Renewable Energy,1996,9 (1-4):714-719.
8Dinse D R,Henderson H I,Richardson J O.Field performance of HPWH preheating for water heating systems in schools[J].ASHRAE Transactions,2004,110 (2):690-695.
