ATAC i system - Energimyndigheten

Termodynamiska data för luft-vattenblandningar
vid höga tryck
2002-02-22
Projekt nr: P11762-2
Projektledare: Professor Jinyue Yan
Kemiteknik/Energiprocesser, KTH, 100 44 Stockholm
tel 08-790 6528, fax 08-723 0858, yanjy@ket.kth.se
Projektdeltagare: Xiaoyan Ji, Jinyue Yan, Mats Westermark
Etappens varaktighet: 2001-09-01 till 2003-03-31
Beviljade medel: 1 554 000 kr
Referensgrupp: Geir Owren, NTNU (fadder), Lars Sjunnesson, Sydkraft
(fadder), Rolf Gabrielsson, Kontaktperson Volvo Aero
Corporation
Projektbeskrivning (Project description):
Evaporative gas turbine (EvGT), or Humid Air Turbine (HAT) cycle, has features of
high efficiency, low cost and low emissions because of the use of evaporative
humidification in combination with integration of heat recovery. Reliable data for the
thermophysical properties of the air-water mixture are necessary for the design of the
EvGT systems. However, there is a significant gap in the knowledge of
thermodynamic properties of air-water mixtures at high pressures. The primary goal
of this project is to investigate thermodynamic properties of air-water mixtures at high
pressures (up to 40 bar). The results of the project will provide appropriate methods to
calculate the properties of water-air mixture, which is very important for the
development and demonstration of the EvGT technology. This project is also of high
scientific value to fill in the knowledge gap of air-water mixture properties at high
pressures.
Projektets mål (Project goal):
The primary goal of the whole project is to develop a more accurate method for
calculation of water-air mixtures at high pressure (up to 40 bar). The reliable data will
be used for design of EvGT systems. Another goal is to fill in the knowledge gap of
thermophysical data for water-air mixture at high temperature and pressure.
The existing data and calculation methods for calculating thermophysical properties
of the water-air mixture were reviewed. A new model was proposed and verified by
the abundant experimental data of the nitrogen-water and oxygen-water systems in
order to predict thermodynamic properties of the water-air mixture reliably. Prediction
results of the proposed model were compared with the available experimental data
and those calculated with other models.
The whole project has planned for four years. In this phase (etapp 2) of the second
period of 1.5 years, following tasks are performed:
1. Follow the R&D in this area and make complete survey of existing data and
methods for the air-water system. Meanwhile, the available experimental data for
the nitrogen-water and oxygen-water systems were also surveyed.