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What (who) is thermal efficiency - definition
Thermal efficiency
PERFORMANCE MEASURE OF A DEVICE THAT USES THERMAL ENERGY, EXPRESSED AS THE RATIO OF WORK DONE OVER THERMAL ENERGY USED
Thermodynamic efficiency; Thermal efficiencies; Ηth
In thermodynamics, the thermal efficiency (\eta_{\rm th}) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc.
thermal efficiency
PERFORMANCE MEASURE OF A DEVICE THAT USES THERMAL ENERGY, EXPRESSED AS THE RATIO OF WORK DONE OVER THERMAL ENERGY USED
Thermodynamic efficiency; Thermal efficiencies; Ηth
¦ noun the efficiency of a heat engine measured by the ratio of the work done by it to the heat supplied to it.
Spectral efficiency
INFORMATION RATE THAT CAN BE TRANSMITTED OVER A GIVEN BANDWIDTH
Spectrum efficiency; System spectrum efficiency; System spectral efficiency; Link spectral efficiency; Bandwidth efficiency; BandWidth efficiency; Area spectral efficiency; Spectral efficiency comparison table; Bit/s/Hz; Bits/s/Hz; (bit/s)/Hz; (bit/s)/Hertz; Modulation efficiency; Channel spectral efficiency
Spectral efficiency, spectrum efficiency or bandwidth efficiency refers to the information rate that can be transmitted over a given bandwidth in a specific communication system. It is a measure of how efficiently a limited frequency spectrum is utilized by the physical layer protocol, and sometimes by the medium access control (the channel access protocol).
Examples of use of thermal efficiency
1. The IGCC technology, which converts coal into gas to firepower plants, gives higher thermal efficiency than conventional plants, he added.
2. These include moving ahead faster with the extraction of carbon from coal (with the prospect of a vast market for this technology in China and India); expanding the small–scale generation of electricity, thus doubling thermal efficiency by making use of the waste heat and avoiding transmission losses; and fixing a much larger objective than 5 per cent for the use of biofuels in petrol.
3. June 6 2006 03:00 ×Energy demand patterns will change as summers become hotter, leading to more demand for air conditioning, and winters become milder, reducing demand for heating ×Plant availability may be affected as routine maintenance, currently done in low–demand summer months, is scheduled in periods of higher demand ×Fossil fuel plants, particularly gas turbines, will operate less efficiently as average temperatures increase, because their thermal efficiency is adversely affected by both lower air density and higher temperatures ×Infrastructure may be affected as patterns of subsidence, flooding, icing damage and strong winds change ×Coastal power stations will become more vulnerable to sea–level rise and storm surges ×Cooling systems may be adversely affected by reduced rainfall and the reduction in river and stream flow