Showing papers by "Umberto Desideri published in 1993"
24 May 1993
TL;DR: In this paper, three different plant solutions are considered, where modifications are related to water circuit, to determine the most important parameters affecting the cycle's performances, and the results show the advantage of employing a dry cooling tower to lower the recirculating water temperature or the total mass flow coming from evaporator.
Abstract: and Joiner (1990) and Bettagli (1992). The humid air cycle (Rao,1990), recently proposed, is an intercooled gas turbine cycle, having an air-water mixing evaporator before the combustion chamber, and a recovering system for exhaust gases. The solution appears to have several advantages: increase in efficiency, increase in power output, reduction of NO x. These important effects are similar to those encountered in STIG (STeam Injection Gas turbine) or CHENG (Saad and Cheng, 1992) power plants: however the particular non-isothermal vaporisation here considered enhances the efficiency increase. Considering a TIT (Turbine Inlet Temperature) at 1273 K and combustion with methane, three different plant solutions are considered, where modifications are related to water circuit, to determine the most important parameters affecting the cycle's performances. The results show the advantage of employing a dry cooling tower to lower the recirculating water temperature or the total mass flow coming from evaporator. Both cases result in a lower exhaust gases temperature. The advantages and comebacks of the three cycles are taken into consideration and discussed in detail, selecting a possible optimised plant solution. The paper emphasises also the practical feasibility of this plant.
19 citations
24 May 1993
TL;DR: In this article, the effects of the relative humidity and the compression ratio on the HAT cycle performance were investigated and the parameters which allow to obtain high efficiency with high specific power, without a decrease in efficiency and low water consumption.
Abstract: The humid air turbine (HAT), patented by Fluor Daniel, is an innovative cycle which allows to obtain an increase in efficiency and power production. The modification proposed by DEF allows to optimise the plant when natural gas is injected in the combustion chamber.Assuming a TIT (Temperature Inlet Turbine) at 1273 K and the cooling of recirculating water in the refrigerators, we studied the effects of the relative humidity and the compression ratio on the cycle’s performances.The aim of this paper is to suggest the parameters which allow to obtain high efficiency with high specific power, the possibility to modulate power production without a decrease in efficiency and low water consumption.Copyright © 1993 by ASME
17 citations