Heat Pump Backup System Fuel

Backup fuel used by the heat pump

Data Type: 
Constrained List
Unit of Measure: 
Commercial, Residential, Multifamily
List Options Option Definition Unit of Measuresort descending
Well water Well water None
Waste heat Byproduct heat resource from a type of equipment that's captured and may be repurposed. None
Coal anthracite None
Other Other None
Energy Combination of multiple resource fuels. None
Coal bituminous None
Unknown Unknown None
Electricity None
Coke None
None None None
Natural gas Natural gas is a hydrocarbon gas mixture consisting primarily of methane, but commonly includes varying amounts of other higher alkanes and even a lesser percentage of carbon dioxide, nitrogen, and hydrogen sulfide. Natural gas is an energy source often used for heating, cooking, and electricity generation. It is also used as fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals. None
Wood None
Coal None
Not applicable Not applicable None
Fuel oil None
Biomass Biomass refers to the combustion of solid biomass feedstocks, such as energy crops, agricultural crops, forestry residues, aquatic crops, biomass processing residues, municipal waste, and animal waste. Biomass can be used to power turbines that generate electricity or directly for heating. None
Wood pellets None
Fuel oil no 1 None
Water None
Hydropower Hydropower projects capture the kinetic energy of moving water to produce electricity with the construction of dams. While hydropower is renewable and produces relatively few GHG emissions, hydropower projects can have other impacts on the environment, such as obstructing fish passage and altering land resources by impounding excessive nutrients None
Fuel oil no 2 None
Potable water Water that is of sufficient quality for human consumption and that is obtained from public water systems that are classified, permitted, and approved for human consumption. None
Biofuel Biofuel or biogas. Biofuels can also be used for transportation. None
Fuel oil no 4 None
Wastewater Wastewater is any water that has been adversely affected in quality by anthropogenic influence. Municipal wastewater is usually conveyed in a combined sewer or sanitary sewer, and treated at a wastewater treatment plant. None
Wind Wind turbines harness the kinetic energy in the wind and is converted to rotational energy and then generates electric energy. The power capacity is dependent on the turbine design such as height and blade size. Capacity is determined by the inherent on-site wind speed is time-dependent. None
Fuel oil no 5 and no 6 None
Greywater Greywater or sullage is defined as wastewater generated from plates and wash-hand basins, showers and baths, which, because it is nearly as clean as potable water, can be recycled on site for uses such as toilet flushing, landscape irrigation and constructed wetlands. None
Geothermal Geothermal systems capture the earthÕs heat for use in generating electricity. None
District steam None
Reclaimed water Reclaimed water or recycled water, is former wastewater (sewage) that is treated to remove solids and impurities, and used in sustainable landscaping irrigation, to recharge groundwater aquifers, to meet commercial and industrial water needs, and for drinking. None
Solar Solar energy uses the sun's energy for HVAC, heating water and producing electricity. None
District hot water None
Captured rainwater None
Hydrothermal A hydrothermal resource is a geothermal resource that often involves fluid, heat, and permeability for electricity generation. These geothermal systems can occur in diverse geologic settings, sometimes without clear surface manifestations of the underlying resource. Low-temperature geothermal energy is defined as heat obtained from the geothermal fluid in the ground at temperatures of 300¡F (150¡C) or less. Low-temperature resources can be harnessed to generate electricity using binary cycle electricity generating technology. None
District chilled water None
Alternative water Water that is not obtained from a surface water source, groundwater source, nor purchased reclaimed water from a third party. It can include rainwater or stormwater harvested onsite, sump pump water harvesting, gray water, air-cooling condensate, reject water from water purification systems, water reclaimed onsite, or water derived from other water reuse strategies. None
Irrigation water Water used for irrigation None
Dry steam Dry steam geothermal power plants use hydrothermal fluids that are primarily steam. The steam travels directly to a turbine, which drives a generator that produces electricity. The steam eliminates the need to burn fossil fuels to run the turbine (also eliminating the need to transport and store fuels). These plants emit only excess steam and very minor amounts of gases. An example of a source is the Geysers in Northern California. None
Propane None
District energy None
Flash steam Flash steam plants are the most common type of geothermal power generation plants in operation today. Fluid at temperatures greater than 360¡F (182¡C) is pumped under high pressure into a tank at the surface held at a much lower pressure, causing some of the fluid to rapidly vaporize, or "flash." The vapor then drives a turbine, which drives a generator. If any liquid remains in the tank, it can be flashed again in a second tank to extract even more energy. None
Liquid propane None
Steam Generic steam resource such as for industrial use None
Ethanol Ethanol, also known as ethyl alcohol, grain alcohol, and EtOH, comes from the fermentation of sugars found in food crops such as corn, or cellulosic material such as wood chips, leaves, agricultural waste, and similar material. Ethanol is used in gasoline mixtures to power many automobiles. There may be more energy needed to cultivate, harvest, and process the material than is contained in the final fuel produced. Biomass feedstocks are grown and transported to ethanol production facilities. After ethanol is produced at facilities, a distribution network supplies ethanol-gasoline blends to fueling stations for use by drivers. None
Kerosene None
Waste Waste None
Biodiesel Biodiesel is made by converting natural oilsÑusually new or used vegetable oils and animal fatsÑinto usable liquid fuels. The fuel can be used in many engines or combustion appliances designed for diesel or no. 2 fuel oil. It is non-toxic and biodegradable. None
Diesel None
Term ID: d117694f-e524-4bbe-947a-3079a7ae4ece