Technical Potential of Solar Water Heating to Reduce Fossil Fuel Use and Greenhouse Gas Emissions in the United States

Denholm, P.

关键词: AVAILABILITY;    COMMERCIAL BUILDINGS;    FOSSIL FUELS;    GREENHOUSE GASES;    HEAT TRANSFER FLUIDS;    MARKET;    NATURAL GAS;    PRICES;    SECURITY;    SOLAR WATER HEATING;    SUN;    TA;   

DOI  :  10.2172/902167
RP-ID  :  NREL/TP-640-41157
PID  :  OSTI ID: 902167
Others  :  TRN: US200719%%595

美国|英语

来源: SciTech Connect

【 摘 要 】

Use of solar water heating (SWH) in the United States grew significantly in the late 1970s and early 1980s, as a result of increasing energy prices and generous tax credits. Since 1985, however, expiration of federal tax credits and decreased energy prices have virtually eliminated the U.S. market for SWH. More recently, increases in energy prices, concerns regarding emissions of greenhouse gases, and improvements in SWH systems have created new interest in the potential of this technology. SWH, which uses the sun to heat water directly or via a heat-transfer fluid in a collector, may be particularly important in its ability to reduce natural gas use. Dependence on natural gas as an energy resource in the United States has significantly increased in the past decade, along with increased prices, price volatility, and concerns about sustainability and security of supply. One of the readily deployable technologies available to decrease use of natural gas is solar water heating. This report provides an overview of the technical potential of solar water heating to reduce fossil fuel consumption and associated greenhouse gas emissions in U.S. residential and commercial buildings.