KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/kmitl/1

Browse

Search Results

Now showing 1 - 5 of 5

Some of the metrics are blocked by your
consent settings
Energy Conserving in Power Plant: A Case Study of Practical Demand Cutting in Power Station Service System
(2024-01-01)
Pingyos, K.
;
Jirasuwankul, N.
;
Chandee, S.
This paper proposes an energy conserving practice in gas turbine and combined cycle power plant (GTCC) during the plant operating in reserve shutdown mode. By using demand cutting in plant station services system, which was a case study of one unit combined cycle system of the twos in Wang-Noi power plant block-4, EGAT-Thailand. The results from the field data illustrated that, among available technical possibilities during the plant operating in reserve shutdown mode, demand cutting in circulating and cooling water pump system (CWP), by redirecting and replacing the large, conventional circulating water circuit, with the new one of fractional flow capacity and the driven motor, was the promised and effective approach. The best practice on energy conserving of the CWP system during the post commissioning period, was recorded as much as 50% in averaged of demand reduction when compared to the base case of the pre-commissioning period. It finally turned out to be approximately 556 MWh of the expected energy conserving per year.
Some of the metrics are blocked by your
consent settings
A proper shape of the trailing edge modification to solve a housing damage problem in a gas turbine power plant
(2021-04-01)
Jansaengsuk, Thodsaphon
;
Kaewbumrung, Mongkol
;
Busayaporn, Wutthikrai
;
Thongsri, Jatuporn
To solve the housing damage problem of a fractured compressor blade (CB) caused by an impact on the inner casing of a gas turbine in the seventh stage (from 15 stages), modifications of the trailing edge (TE) of the CB have been proposed, namely 6.5 mm curved cutting and a combination of 4 mm straight cutting with 6.5 mm curved cutting. The simulation results of the modifications in both aerodynamics variables C<inf>l</inf> and C<inf>d</inf> and the pressure ratio, including structural dynamics such as a normalized power spectrum, frequency, total deformation, equivalent stress, and the safety factor, found that 6.5 mm curved cutting could deliver the aerodynamics and structural dynamics similar to the original CB. This result also overcomes the previous work that proposed 5.0 mm straight cutting. This work also indicates that the operation of a CB gives uneven pressure and temperature, which get higher in the TE area. The slightly modified CB can present the difference in the properties of both the aerodynamics and the structural dynamics. Therefore, any modifications of the TE should be investigated for both properties simultaneously. Finally, the results from this work can be very useful information for the modification of the CB in the housing damage problem of the other rotating types of machinery in a gas turbine power plant.
Some of the metrics are blocked by your
consent settings
Investigation of the trailing edge modification effect on compressor blade aerodynamics using SST k-ω turbulence model
(2019-04-01)
Kaewbumrung, Mongkol
;
Tangsopa, Worapol
;
Thongsri, Jatuporn
A gas turbine power plant in Thailand had the problem of compressor blade fracture in Stages 6-8, which was caused by housing damage. This gas turbine has a total of 15 stages. The housing damage reduced the lifetime of blades to an unacceptable level. This article shall report the solution and outcomes. Three-dimensional (3D) compressor blade models in the problematic stages were prepared by a 3D scanning machine to find a solution based on computational fluid dynamics (CFD), and then were completed for simulation by adding Stages 5 and 9 to become a multi-stage axial model. The latter models were modified by trimming the trailing edge by 1-, 5-, and 10-mm. Using ANSYS CFX R19.2 software, the CFD results of the trailing edge modification effect on flow using the shear stress transport (SST) k-ω turbulence model revealed aerodynamics inside the problematic stages both before and after blade modifications. Modifying the blade by 5 mm was suitable, because it had lesser effects on aerodynamic parameters: pressure ratio, drag, and lift coefficients, when compared to the modification of 10 mm. The larger the modification, the greater the effect on aerodynamics. The effects on aerodynamics were intensified when they were modified by 10 mm. The validation of base line blades was conducted for the overall compressor parameters that were compared with the measurable data. These results were accepted and gave positive feedbacks from engineers who practically applied our reports in a real maintenance period of gas turbine.
Some of the metrics are blocked by your
consent settings
Environmental impact factors on Thai biomass power projects: A structural equation model
(2015-01-01)
Aueatchasai, Somboon
;
Fongsuwan, Wanno
This study discusses factors, relating to the environmental impact of biomass power generation within Thailand and the broader regional ASEAN community. While there are ambitious government targets to increase the share of renewable energy in many countries, it is increasingly recognized that social acceptance may be a constraining factor in achieving this target. This study introduces three dimensions of environmental impact namely; public perception, government policy and community participation. Thailand's economic growth is in many respects determined by power generation with electricity demand moving hand-in-hand with rapidly expanding economic growth. With the doubling of Thailand's population since the 1960s, the necessity for rural electricity coverage has also increased dramatically. This, however, is at times difficult and expensive to achieve in these remote rural locations with their sparsely populated areas. However, power must be available nationwide and when areas are not appropriate for a large-scale power plant investment, smaller and less expensive local power plants are required. In these rural cases, biomass power plants can be considered as one alternative. Since, Thailand outside the main metropolitan areas is still mostly rural and agricultural, there is a ready source of raw material for biomass conversion. This study undertook the modeling and analysis of Thailand's biomass industry using both quantitative and qualitative research methods. Results showed from the hypotheses that public perception, government policy and community participation had a significant and direct contribution on the overall environmental impact of the local community.
Some of the metrics are blocked by your
consent settings
ASEAN Biomass energy a Thai environmental impact analysis by use of a Structural Equation Model (SEM)
(2014-01-01)
Aueatchasai, Somboon
;
Fongsuwan, Wanno
Thailand's economic growth is in many respects determined by power generation with the demand for electricity moving hand-in-hand with rapidly expanding economic growth. With the doubling of Thailand's population since the 1960s, the necessity for rural electricity coverage has also increased dramatically. This however is at times difficult and expensive to achieve in these remote rural locations with their sparsely populated areas. However, power must be available nationwide and when areas are not appropriate for a large-scale power plant investment, smaller and less expensive local power plants need to be chosen. In these rural cases, biomass power plants can be considered as one alternative. Since, Thailand outside the main metropolitan areas is still mostly rural and agricultural, there is a ready source of raw material for biomass power plant conversion. The purpose of this research therefore was to determine the environmental impact of certain variables on the environmental impact on the local community. This study concerns the modeling and analysis of Thailand's biomass power industry using both quantitative and qualitative research methods. Quantitative data was obtained using stratified sampling from 323 biomass power community members and qualitative data from in-depth research of 10 community leaders using simple random sampling while using Partial Least Square (PLS-Graph) software to apply Structural Equations Modeling (SEM) analysis. Results showed from the hypotheses that government policy and community participation had a significant and direct contribution on the overall environmental impact of t he local community.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results