Effect of control modes and turbine cooling on the part load performance in the gas turbine cogeneration system

1995 ◽  
Vol 15 (3) ◽  
pp. 281-291 ◽  
Author(s):  
Tong Seop Kim ◽  
Sung Tack Ro
Keyword(s):  
Gas Turbine ◽  
Part Load ◽  
Turbine Cooling ◽  
Cogeneration System

Thermo-Economic Analysis of an Intercooled, Reheat and Recuperated Gas Turbine for Cogeneration Applications: Part II — Part-Load Operation

2001 ◽  
Author(s):  
R. Bhargava ◽  
G. Negri di Montenegro ◽  
A. Peretto
Keyword(s):  
Economic Analysis ◽  
Gas Turbine ◽  
The Other ◽  
Load Range ◽  
Part Load ◽  
Full Load ◽  
Performance Loss ◽  
Low Load ◽  
Cogeneration System ◽  
Load Conditions

The knowledge of off-design performance for a given gas turbine system is critical particularly in applications where considerable operation at low load setting is required. This information allows designers to ensure safe operation of the system and determine in advance thermo-economic penalty due to performance loss while operating under part-load conditions. In this paper, thermo-economic analysis results for the intercooled, reheat (ICRH) and recuperated gas turbine, at the part-load conditions in cogeneration applications, have been presented. Thermodynamically, a recuperated ICRH gas turbine based cogeneration system showed lower penalty in terms of electric efficiency and Energy Saving Index over the entire part-load range in comparison to the other cycles (non-recuperated ICRH, recuperated Brayton and simple Brayton cycles) investigated. Based on the comprehensive economic analysis for the assumed values of economic parameters, this study shows that, a mid-size (electric power capacity 20 MW) cogeneration system utilizing non-recuperated ICRH cycle provides higher return on investment both at full-load and part-load conditions, compared to the other same size cycles, over the entire range of fuel cost, electric sale and steam sale values examined. The plausible reasons for the observed trends in thermodynamic and economic performance parameters for four cycles and three sizes of cogeneration systems under full-load and part-load conditions have been presented in this paper.

Micro gas turbine cogeneration system with latent heat storage at the University: Part II: Part load and thermal priority mode

2014 ◽  
Vol 65 (1-2) ◽  
pp. 246-254 ◽  
Author(s):  
Osamu Kurata ◽  
Norihiko Iki ◽  
Takayuki Matsunuma ◽  
Tetsuhiko Maeda ◽  
Satoshi Hirano ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Part Load ◽  
Micro Gas Turbine ◽  
Cogeneration System ◽  
The University

Thermoeconomic Analysis of an Intercooled, Reheat, and Recuperated Gas Turbine for Cogeneration Applications—Part II: Part-Load Operation

2002 ◽  
Vol 124 (4) ◽  
pp. 892-903 ◽  
Author(s):  
R. Bhargava ◽  
G. Negri di Montenegro ◽  
A. Peretto
Keyword(s):  
Gas Turbine ◽  
The Other ◽  
Safe Operation ◽  
Load Range ◽  
Part Load ◽  
Full Load ◽  
Performance Loss ◽  
Low Load ◽  
Cogeneration System ◽  
Load Conditions

The knowledge of off-design performance for a given gas turbine system is critical particularly in applications where considerable operation at low load setting is required. This information allows designers to ensure safe operation of the system and determine in advance thermoeconomic penalty due to performance loss while operating under part-load conditions. In this paper, thermoeconomic analysis results for the intercooled reheat (ICRH) and recuperated gas turbine, at the part-load conditions in cogeneration applications, have been presented. Thermodynamically, a recuperated ICRH gas turbine-based cogeneration system showed lower penalty in terms of electric efficiency and Energy Saving Index over the entire part-load range in comparison to the other cycles (nonrecuperated ICRH, recuperated Brayton and simple Brayton cycles) investigated. Based on the comprehensive economic analysis for the assumed values of economic parameters, this study shows that a midsize (electric power capacity 20 MW) cogeneration system utilizing nonrecuperated ICRH cycle provides higher return on investment both at full-load and part-load conditions, compared to the other same size cycles, over the entire range of fuel cost, electric sale, and steam sale values examined. The plausible reasons for the observed trends in thermodynamic and economic performance parameters for four cycles and three sizes of cogeneration systems under full-load and part-load conditions have been presented in this paper.

Steady State Off-Design Performance of Humid Air Turbine Cycle

2007 ◽  
Author(s):  
Bo Wang ◽  
Shijie Zhang ◽  
Yunhan Xiao
Keyword(s):  
Steady State ◽  
Ambient Temperature ◽  
Gas Turbine ◽  
Humid Air ◽  
Part Load ◽  
Design Performance ◽  
Turbine Cooling ◽  
Air Turbine ◽  
Thermodynamic Performance ◽  
Gas Turbine Cycle

The Humid Air Turbine (HAT) cycle is recognized as a competitive innovative gas turbine cycle with good off-design thermodynamic performance. However, the off-design performance of the HAT cycle has not been sufficiently analyzed. In this paper, a steady state on-design and off-design thermodynamic performance investigation of the HAT cycle was presented by comparing the HAT cycle with other competitive gas turbine cycles. In order to perform energy analysis of various gas turbine cycles, a gas turbine cycle analysis system was developed, where the advanced detailed component models of the investigated cycles were built and integrated. A detailed turbine cooling model including various cooling methods was used to indicate the effects of the turbine cooling on the thermodynamic performance of the gas turbine cycles when the turbine inlet temperature is high. The model can also indicate changes in level of cooling technology. The saturator was simulated as a one-dimensional model which can be used to size the saturator at on-design condition and to investigate the thermodynamic performance of the saturator at off-design condition. The HAT cycle was compared with four different cycles for on-design and off-design thermodynamic performances: 1) simple cycle, 2) recuperated cycle (REC), 3) recuperated water injected (RWI) cycle and 4) steam injection gas turbine (STIG) cycle. The focus of the comparison was put on the thermodynamic off-design performance of the different gas turbine cycles. The effects of ambient temperature and load reduction (part-load at ISO conditions) on the thermodynamic performance of the simple, the recuperated, the RWI, the STIG and the HAT cycle were investigated and compared. The results indicate that the HAT cycle can recover the low grade heat efficiently and when ambient temperature increases, HAT cycle has the most favorable off-design performance. At part-load conditions, the off-design performance of HAT cycle is not so good as STIG cycle and simple cycle, but is better than the RWI cycle and recuperated cycle.

scholarly journals Two-Stage Evaporative Inlet Air Gas Turbine Cooling

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1382
Author(s):  
Obida Zeitoun
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Evaporative Cooling ◽  
Air Cooling ◽  
Vapor Compression ◽  
Two Stage ◽  
Turbine Cooling ◽  
Riyadh City ◽  
Vapor Compression Refrigeration ◽  
Gas Turbine Cooling

Gas turbine inlet air-cooling (TIAC) is an established technology for augmenting gas turbine output and efficiency, especially in hot regions. TIAC using evaporative cooling is suitable for hot, dry regions; however, the cooling is limited by the ambient wet-bulb temperature. This study investigates two-stage evaporative TIAC under the harsh weather of Riyadh city. The two-stage evaporative TIAC system consists of indirect and direct evaporative stages. In the indirect stage, air is precooled using water cooled in a cooling tower. In the direct stage, adiabatic saturation cools the air. This investigation was conducted for the GE 7001EA gas turbine model. Thermoflex software was used to simulate the GE 7001EA gas turbine using different TIAC systems including evaporative, two-stage evaporative, hybrid absorption refrigeration evaporative and hybrid vapor-compression refrigeration evaporative cooling systems. Comparisons of different performance parameters of gas turbines were conducted. The added annual profit and payback period were estimated for different TIAC systems.

scholarly journals A New Test Facility for Testing of Cooled Gasturbine Components

1998 ◽  
Author(s):  
Ulf R. Rådeklint ◽  
Christer S. Hjalmarsson
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Temperature Fields ◽  
Test Facility ◽  
Operating Point ◽  
Ir Camera ◽  
Turbine Cooling ◽  
Air Temperatures ◽  
Turbine Vanes ◽  
Conventional Instrumentation

A high pressure hot test facility for cooled gas turbine components has been developed for use in turbine cooling research. In this facility, heat transfer tests for a sector of real turbine vanes can be performed under continuous operation. The heat transfer tests are performed at an operating point that is scaled down from the real engine operating point. The compressor can deliver air at the rate of up to 10 kg/s at 20 bars. Air temperatures of up to 1170 K can be achieved by using an oil-fired combustor. Besides conventional instrumentation such as thermocouples and pressure probes, the facility is equipped with an IR-camera to map two-dimensional wall temperature fields. Hot wire anemometry and an LDV system are used to determine mean and fluctuating velocity components. This paper describes design and performance of the test facility as well as the control and measurement equipment. The test and evaluation procedures used for testing of cooled gas turbine vanes are also presented.

Build Direction Effects on Additively Manufactured Channels

2015 ◽  
Author(s):  
Jacob C. Snyder ◽  
Curtis K. Stimpson ◽  
Karen A. Thole ◽  
Dominic Mongillo
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Pressure Loss ◽  
Small Scale ◽  
Turbine Cooling ◽  
Gas Turbine Cooling ◽  
Gas Turbine Heat Transfer ◽  
Manufacturing Techniques ◽  
Traditional Manufacturing

With the advances of Direct Metal Laser Sintering (DMLS), also generically referred to as additive manufacturing, novel geometric features of internal channels for gas turbine cooling can be achieved beyond those features using traditional manufacturing techniques. There are many variables, however, in the DMLS process that affect the final quality of the part. Of most interest to gas turbine heat transfer designers are the roughness levels and tolerance levels that can be held for the internal channels. This study investigates the effect of DMLS build direction and channel shape on the pressure loss and heat transfer measurements of small scale channels. Results indicate that differences in pressure loss occur between the test cases with differing channel shapes and build directions, while little change is measured in heat transfer performance.

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