Combined Heating, Cooling & Power Handbook: Technologies & by Neil Petchers

By Neil Petchers

A how-to consultant for utilizing power and environmental potency as a method to be reasonable and ecocnomic, this e-book contains photos of kit from a variety of brands, cutaway drawings, format schematics, functionality curves, information tables, functionality exams in response to brands' info, and contributions from quite a few self reliant engineering resources. it truly is divided into 4 major components: idea and expertise; working surroundings; functions; and research and implementation. the writer develops an built-in method of strength and cost-efficiency venture improvement, matching energy construction and heating/cooling necessities to supply reliable monetary returns.

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By Neil Petchers

A how-to consultant for utilizing power and environmental potency as a method to be reasonable and ecocnomic, this e-book contains photos of kit from a variety of brands, cutaway drawings, format schematics, functionality curves, information tables, functionality exams in response to brands' info, and contributions from quite a few self reliant engineering resources. it truly is divided into 4 major components: idea and expertise; working surroundings; functions; and research and implementation. the writer develops an built-in method of strength and cost-efficiency venture improvement, matching energy construction and heating/cooling necessities to supply reliable monetary returns.

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Read or Download Combined Heating, Cooling & Power Handbook: Technologies & Applications: An Integrated Approach to Energy Resource Optimization PDF

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Additional resources for Combined Heating, Cooling & Power Handbook: Technologies & Applications: An Integrated Approach to Energy Resource Optimization

Example text

The FCP heat rate drops with increased process steam use, until a ratio of about 3 Mlb/MWh (1,360 kg/MWh) is reached. This is the point at which no more steam can be taken from the condensing section of the steam turbine (below the extraction port) without overheating, and additional steam must come from supplemental firing with a duct burner or from a fired heat recovery boiler. Because this “fired” steam is used less efficiently, the heat rate curve starts to climb back slowly with greater firing, but the cycle remains roughly twice as efficient as conventionally produced power purchased from the utility grid.

By far, the largest source of inefficiency in the conventional steam cycle is fundamental to the thermodynamic principles underlying the cycle. The latent heat released through the condenser to the environment from the condensing steam after expansion in the steam turbine serves no useful purpose in the power cycle. In this example, roughly 830 Btu/lbm (1,930 kJ/kg) of steam is lost through the condenser. An additional 150 Btu/lbm (349 kJ/kg) of steam is described as “water heating” on the condenser bar below the condenser losses.

Compared with a conventional or combined-cycle central electric generation plant, an on-site cogeneration cycle not only achieves higher overall and net energy efficiencies, but also provides other environmental benefits associated with air quality and non-renewable resource conservation. of steam. The process can use all of the latent heat energy in the steam, and the application has a thermal efficiency of about 83%. Fig. 3-9 Energy Utilization by Power Cycle and Process Loads. Source: Cogen Designs, Inc.

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