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Evaluation of Örtofta Power plant

Perlman, Rebecca LU (2015) MVK920 20151
Department 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:
author
Perlman, Rebecca LU
supervisor
organization
course
MVK920 20151
year
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},
}