Combined heat and power CHP

The term "cogeneration is sometimes used to describe a combined power plant, but it is better used for a combined heat and power (CHP) plant such as the one shown in Fig. 1.6 (see Ref. [2] for a detailed discussion on CHP plants). Now the fuel energy is converted partly into (electrical) work (W) and partly into useful heat (Qu) at a low temperature, but higher than ambient. The non-useful heat rejected is (2nu-... 

In recent years there has been a rapid growth in the number of combined heat and power (CHP) and combined cycle gas turbine (CCGT) plants, driven mainly by gas turbines using natural gas, sometimes with liquid fuel available as stand-by. Governments have encouraged the construction of these plants, as their efficiency is high and they produce less carbon dioxide than conventional coal and oil-burning power stations. However, they present some hazards, as gas turbines are noisy and are therefore usually enclosed. 

Combined Heat and Power (CHP) systems, also called cogeneration systems, generate electricity (or... 

The preceding section reviewed the application of popular prime movers for the generation of electrical power only. In the conversion of fuel energy to electricity it is shown that heat is rejected, either in the exhaust of a diesel or gas turbine or, alternatively, in the condenser of a thermal power plant. It can be seen that by applying these machines to provide both heat and electricity the total energy recovery can be much greater and efficiency thereby improved. Combined heat and power (CHP) schemes of this nature are well-established methods of producing both heat and power efficiently and economically. 

Combined heat and power (CHP) operation, which is a simple cycle gas turbine with a heat recovery heat exchanger that recovers the heat in the turbine... 

Combined aerobic-anaerobic systems, in bioremediation, 25 837 Combined cycle, 10 142-143 Combined cycle fossil fuel plants, 23 236 Combined heat and power (CHP), from biomass, 3 687... 

Many studies indicate a large potential. A 2000 study for the DOE s Energy Information Administration found that the total power needs for combined heat and power (CHP) at commercial and institutional facilities was 75,000-MW. Almost two thirds of these required systems of less than 1-MW. 

Ceramic Fuel Cells Limited (CFCL) and E.ON U.K. have agreed to develop a fuel cell combined heat and power (CHP) unit that can be fitted... 

On-site combined heat and power (CHP) which has existed for years, includes turbines, reciprocating engines and steam turbines. Gas turbines in the 500-kW to 250-MW produce electricity and heat using a thermodynamic cycle known as the Brayton cycle. They produce about 40,000-MW of the total CHP in the United States. The electric efficiency for units of less... 

Combined heat and power (CHP) (Cogeneration) -The thermal energy created while converting fuel to electricity would be utilized for heat in addition to electricity in remote areas and electricity and heat for sites that have a 24 hour thermal/electric demand. 

This fuel cell has shown promise for combined heat and power (CHP) systems. In such systems, the waste heat is used to heat buildings or to do work. Efficiency in a CHP plant can reach 80%. These plants could replace heating plants and power sources in colleges and universities, hotels, and apartment buildings. Because fuel cells have few or no moving... 

Includes industrial combined-heat-and-power (CHP) and industrial electricity-only plants. 

Electricity-only and combined-heat-and-power (CHP) plants whose primary business is to sell electricity, or electricity and heat, to the public. 

Many studies have shown that the potential market is enormous. For instance, a 2000 study for the doe s Energy Information Administration found that the technical market potential for combined heat and power (chp) at commercial and institutional facilities was 75,000 mw, of which more than 60 percent was in systems less than 1 mw in size. This sub-MW market is a very good match for fuel cell technologies. The remaining technical potential in the industrial sector is about 88,000 mw. That analysis did not look at the opportunity created by heat-driven chillers to expand the market for cogeneration, nor did it contemplate cost-effective systems in sizes below 100 kW, as are being pursued by a number of fuel-cell (and other) companies.37... 

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