Thermodynamic Evaluation of Gas Turbine Cogeneration Cycles: Part II—Complex Cycle Analysis

1987 ◽  
Vol 109 (1) ◽  
pp. 8-15 ◽  
Author(s):  
I. G. Rice
Keyword(s):  
Gas Turbine ◽  
Heat Balance ◽  
Steam Injection ◽  
Balance Method ◽  
Visual Perspective ◽  
Thermodynamic Evaluation ◽  
The Future ◽  
Steam Cooling ◽  
The Heat Balance ◽  
Regenerative Cycle

Complex open gas turbine cycles are analyzed by applying the heat balance method presented in Part I of this paper. Reheating, intercooling, regeneration, steam injection, and steam cooling are evaluated graphically to give a visual perspective of what takes place in terms of the overall heat balance when such complexities are introduced to the cycle. An example of a viable, new, intercooled regenerative cycle is given. A second example of a prototype reheat gas turbine is also included. The overall approach using the heat balance method can be applied to various cogeneration configurations when considering the more complex cycles of the future.

Thermodynamic Evaluation of Gas Turbine Cogeneration Cycles: Part I—Heat Balance Method Analysis

1987 ◽  
Vol 109 (1) ◽  
pp. 1-7 ◽  
Author(s):  
I. G. Rice
Keyword(s):  
Gas Turbine ◽  
Heat Balance ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Pressure Ratio ◽  
Turbine Rotor ◽  
Balance Method ◽  
Inlet Temperature ◽  
Thermodynamic Evaluation ◽  
Exhaust Temperature

This paper presents a heat balance method of evaluating various open-cycle gas turbines and heat recovery systems based on the first law of thermodynamics. A useful graphic solution is presented that can be readily applied to various gas turbine cogeneration configurations. An analysis of seven commercially available gas turbines is made showing the effect of pressure ratio, exhaust temperature, intercooling, regeneration, and turbine rotor inlet temperature in regard to power output, heat recovery, and overall cycle efficiency. The method presented can be readily programmed in a computer, for any given gaseous or liquid fuel, to yield accurate evaluations. An X–Y plotter can be utilized to present the results.

scholarly journals Estimating the Evaporation from Irrigation Canals in Northwestern China Using the Double-Deck Surface Air Layer Model

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Suhua Liu ◽  
Weizhen Wang ◽  
Makito Mori ◽  
Tetsuo Kobayashi
Keyword(s):  
Heat Balance ◽  
Field Experiments ◽  
Surface Wind ◽  
Balance Method ◽  
Northwestern China ◽  
Heihe River ◽  
Irrigation Canals ◽  
Layer Model ◽  
The Heat Balance ◽  
Surface Air Layer

The evaporation from irrigation canals was estimated by the aerodynamic method based on the double-deck surface air layer model (called “DSAL model” for short hereafter). The DSAL model describes the surface air layer over a canal as a composite air layer with two sublayers, the lower sublayer and the upper sublayer. The lower sublayer is a few tens of centimeters thick and formed by the flowing water, in which there is no advection; the upper sublayer is over the lower sublayer and formed by the surface wind. The results were compared to those obtained by the heat balance method; field experiments were conducted in the middle reaches of the Heihe River in northwestern China. Results showed that cumulative evaporation instances estimated by the DSAL model were equal in order of magnitude to those by the heat balance method on observed days during the daytime (0700~1900 BST). We infer from these experimental results that the evaporation loss in transport in this region is of the order of one percent at most.

scholarly journals The Capability of Different Semianalytical Equations for Estimation of NOx Emissions of Gas Turbines

1994 ◽  
Author(s):  
T. Becker ◽  
M. A. Perkavec
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Coke Oven ◽  
Steam Injection ◽  
Nox Emissions ◽  
Operational Conditions ◽  
Inlet Conditions ◽  
The One ◽  
Turbine Design ◽  
Regenerative Cycle

The NOx emissions of gas turbines are depending on different influences. On the one side there are the effects fixed by the gas turbine design and on the other side the ambient effects, the fuel properties and the operational conditions. Because the NOx emissions are difficult to calculate by chemical reactions and flow calculations, some investigators developed semianalytical equations, which in their opinion contained the most important influencing factors together with some tuning factors for the actual gas turbine design and application. This paper shows the capability of those procedures, including a new one. It compares the calculated NOx emission with measured data. The comparisons were made for one gas turbine fired with different fuels (natural gas, propane, butane, coke oven gas), as well as for different combustor inlet conditions in case of simple and regenerative cycle operation. Reference is made also for some other gas turbine models. Also full and part load operation as well as the steam injection effects are included.

Sap flow by the heat balance method applied to small size Salix trees in a short-rotation forest

1995 ◽  
Vol 8 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Anders Lindroth ◽  
Jan Cermak ◽  
Jiri Kucera ◽  
Emil Cienciala ◽  
Henrik Eckersten
Keyword(s):  
Heat Balance ◽  
Sap Flow ◽  
Balance Method ◽  
Rotation Forest ◽  
Short Rotation ◽  
Short Rotation Forest ◽  
The Heat Balance
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