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2. Inverter compressor - Wikipedia

   en.wikipedia.org/wiki/Inverter_compressor

   This is a very common unit type. The rising cost of energy means that air conditioning manufacturers must develop a new generation of high-efficiency, cost-effective air conditioners for commercial buildings that meet or exceed a part-load efficiency standard of typically 18 IEER. The aim is to reduce energy use by 30% over current equipment.

3. 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.

4. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   Waveform produced by a cigarette lighter 12 volt DC to 120 V AC 60 Hz inverter. The modified sine wave is the sum of two square waves, one of which is delayed one-quarter of the period with respect to the other. The result is a repeated voltage step sequence of zero, peak positive, zero, peak negative, and again zero.

5. Thermoelectric generator - Wikipedia

   en.wikipedia.org/wiki/Thermoelectric_generator

   The efficiency of a given material to produce a thermoelectric power is simply estimated by its “figure of merit” zT = S 2 σT/κ. For many years, the main three semiconductors known to have both low thermal conductivity and high power factor were bismuth telluride (Bi 2 Te 3), lead telluride (PbTe), and silicon germanium (SiGe). Some of ...

6. Coefficient of performance - Wikipedia

   en.wikipedia.org/wiki/Coefficient_of_performance

   The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [ 1 ] [ 2 ] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.

7. 10 Easy Ways to Make Your Refrigerator More Efficient - AOL

   www.aol.com/finance/10-easy-ways-refrigerator...

   An energy-efficient refrigerator could help save you money and lower your environmental impact. Check out these tips on how to make your fridge more efficient. 10 Easy Ways to Make Your ...