EnergyWin (Thermal Efficiency Analysis Program for Power Generation Systems)

We have developed the computer software to analyze the thermal efficiency of various power generation systems. This software corresponds to not only the existing thermal power systems but also a new power system like IGCC, Fuel Cell, and so on. Moreover, we performed a lot of study using this software, such as conceptual design of a new power system and diagnostic of the existing power plant.
This software is... Proprietary software in CRIEPI For Windows application (less than 10MB) OS: Windows 95/98/Me/NT/2000/XP/Vista Language: Japanese	This software has... Flexibility for setting calculation conditions Flexibility for adding new component models Library of steam table based on IAPWS IF-97

The software can analyze the thermal efficiency of entire system of various power plants quickly.

Calculation conditions
1)	Condensate flow rate	: 100 t/h
2)	Feed water inlet pressure	: 0.8 MPa
3)	Feed water inlet temperature	: 340 K
4)	Extraction steam pressure	: 0.09 MPa
5)	Quality of extraction steam	: 0.95
6)	Turbine drain flow rate	: 2 t/h
7)	Terminal temperature difference (TD)	: 3.6 K
8)	Initial temperature difference (DC)	: 5.6 K
9)	pressure drop of condensate flow	: 0%
10)	pressure drop of extraction flow	: 0%

The values such as extraction steam flow rate and heat exchanging performance have been computed. Thermal properties of every working fluid are displayed on a canvas.
You can see Heat flux, coefficient of heat transmission, log-mean temperature difference, temperature efficiency, TD and DC on a property window.

Moreover, if the value of extraction steam flow rate is set, you can obtain TD, which also gives you the feed water outlet temperature. You can also calculate the fluid temperatures around this heater by heat transmission coefficient.

As for thermal power plant...

Using plant operation data, we can calculate the performance of each component in systems and grasp ongoing changes. You can determine the major decreasing factors in thermal efficiency, and evaluate how each factor influences over thermal efficiency.

As for new power generation system...

It is required for the power generation system that the generation efficiency is higher and operation characteristics are better. Many gas turbine systems which increased power, improved generation efficiency and decreased emissions of NOx by high humid air are proposed. We analyzed these systems under a common calculation condition, such as atmospheric condition, efficiency of equipments and combustor outlet temperature.

Reference :Toru TAKAHASHI, Yoshinobu NAKAO and Eiichi KODA, “Analysis and Evaluation about Advanced Humid Air Turbine System, ICOPE-2007, Oct 23-27, 2007, Hangzhou, China