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  2. Paycheck Protection Program - Wikipedia

    en.wikipedia.org/wiki/Paycheck_Protection_Program

    President Trump signs the Paycheck Protection Program and Health Care Enhancement Act (H.R. 266), April 24, 2020. The Paycheck Protection Program (PPP) is a $953-billion business loan program established by the United States federal government during the Trump administration in 2020 through the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) to help certain businesses, self ...

  3. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    An air source heat pump ( ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used ...

  4. Scroll compressor - Wikipedia

    en.wikipedia.org/wiki/Scroll_compressor

    Scroll compressor. A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. [1] It is used in air conditioning equipment, as an automobile supercharger (where it is known as a scroll-type supercharger) and as a vacuum pump. Many residential central heat pump and air ...

  5. Electrical grid - Wikipedia

    en.wikipedia.org/wiki/Electrical_grid

    v. t. e. An electrical grid (or electricity network) is an interconnected network for electricity delivery from producers to consumers. Electrical grids consist of power stations, electrical substations to step voltage up or down, electric power transmission to carry power over long distances, and finally electric power distribution to customers.

  6. Thermoelectric cooling - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_cooling

    Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current.

  7. Absorption heat pump - Wikipedia

    en.wikipedia.org/wiki/Absorption_heat_pump

    An absorption heat pump ( AHP) is a heat pump driven by thermal energy such as combustion of natural gas, steam solar-heated water, air or geothermal-heated water [1] [2] differently from compression heat pumps that are driven by mechanical energy. [citation needed] AHPs are more complex and require larger units compared to compression heat ...

  8. These apps allow workers to get paid between paychecks ... - AOL

    www.aol.com/news/apps-allow-workers-paid-between...

    Experts say there are steep costs. CORA LEWIS. April 24, 2024 at 12:53 PM. NEW YORK (AP) — When Anna Branch, 37, had her hours at work reduced at the start of the pandemic in 2020, she suddenly ...

  9. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    The pump's air intake is filtered by a rotating screen or the vehicle air filter to exclude dirt particles large enough to damage the system. Air is delivered under light pressure to the injection point(s). A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components.

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