Evaluation of Örtofta Power plant
(2015) MVK920 20151Department of Energy Sciences
- Abstract
- During the fall of 2014 Kraftringen who is the company that owns the Örtofta Power plant made a decision to perform a group of tests on their plant to establish the performance of the turbine. The Örtofta power plant is a biomass-fuelled plant and is because of this classified as a zero-admission power plant.
The goal of these test were to establish the performance of the turbine. The tests were planned and executed according to the ASME PTC 6 [6] standard for performance testing of steam turbines. But due to cost reduction the instrumentation used during the tests were the already preinstalled non-calibrated operational instruments. This report will describe the procedure and results of evaluating the performance of the steam turbine.... (More) - During the fall of 2014 Kraftringen who is the company that owns the Örtofta Power plant made a decision to perform a group of tests on their plant to establish the performance of the turbine. The Örtofta power plant is a biomass-fuelled plant and is because of this classified as a zero-admission power plant.
The goal of these test were to establish the performance of the turbine. The tests were planned and executed according to the ASME PTC 6 [6] standard for performance testing of steam turbines. But due to cost reduction the instrumentation used during the tests were the already preinstalled non-calibrated operational instruments. This report will describe the procedure and results of evaluating the performance of the steam turbine.
The performance of a steam turbine can be established by a set of parameters, in this report these are chosen to be heat rate, efficiency and swallowing capacity. An extensive uncertainty analysis was carried out for both the measurements and the calculated results following the ASME PTC 19.1, a standard describing the method of test uncertainty [7].
To investigate the uncertainties regarding the mass flow in the cycle further a fictitious case were set up as if a calibrated flow instrument were to be inserted. According to the ASME PTC 6 [6] a flow measurements should during a performance test be installed previous to the feed water tank. The final feed water flow can then be derived using the pressures and temperatures in the high pressure preheating line. The uncertainties used for the input parameters were retrieved from an example in the ASME PTC 6 standard [6].
The result from the uncertainty analysis showed that the measurements, excluding the flow measurements, had very low random uncertainties. This could be explained by the large sample size, that was over 200 measurements per test for each measuring point. For the calculated results the efficiency also showed a low uncertainty but here the mass flow had no influence on the result. For the heat rate and swallowing capacity where the mass flow had a large influence the uncertainty was significantly higher.
When comparing the fictitious case of calibrated flow measurements and the actual installed flow measurement used during the tests a large deviation was found. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/5473951
- author
- Perlman, Rebecca LU
- supervisor
- organization
- course
- MVK920 20151
- year
- 2015
- type
- H2 - Master's Degree (Two Years)
- subject
- report number
- ISRN LUTMDN/TMHP-15/5351-SE
- ISSN
- 0282-1990
- language
- English
- id
- 5473951
- date added to LUP
- 2015-06-18 14:08:22
- date last changed
- 2015-06-18 14:08:22
@misc{5473951,
abstract = {{During the fall of 2014 Kraftringen who is the company that owns the Örtofta Power plant made a decision to perform a group of tests on their plant to establish the performance of the turbine. The Örtofta power plant is a biomass-fuelled plant and is because of this classified as a zero-admission power plant.
The goal of these test were to establish the performance of the turbine. The tests were planned and executed according to the ASME PTC 6 [6] standard for performance testing of steam turbines. But due to cost reduction the instrumentation used during the tests were the already preinstalled non-calibrated operational instruments. This report will describe the procedure and results of evaluating the performance of the steam turbine.
The performance of a steam turbine can be established by a set of parameters, in this report these are chosen to be heat rate, efficiency and swallowing capacity. An extensive uncertainty analysis was carried out for both the measurements and the calculated results following the ASME PTC 19.1, a standard describing the method of test uncertainty [7].
To investigate the uncertainties regarding the mass flow in the cycle further a fictitious case were set up as if a calibrated flow instrument were to be inserted. According to the ASME PTC 6 [6] a flow measurements should during a performance test be installed previous to the feed water tank. The final feed water flow can then be derived using the pressures and temperatures in the high pressure preheating line. The uncertainties used for the input parameters were retrieved from an example in the ASME PTC 6 standard [6].
The result from the uncertainty analysis showed that the measurements, excluding the flow measurements, had very low random uncertainties. This could be explained by the large sample size, that was over 200 measurements per test for each measuring point. For the calculated results the efficiency also showed a low uncertainty but here the mass flow had no influence on the result. For the heat rate and swallowing capacity where the mass flow had a large influence the uncertainty was significantly higher.
When comparing the fictitious case of calibrated flow measurements and the actual installed flow measurement used during the tests a large deviation was found.}},
author = {{Perlman, Rebecca}},
issn = {{0282-1990}},
language = {{eng}},
note = {{Student Paper}},
title = {{Evaluation of Örtofta Power plant}},
year = {{2015}},
}