Abstract
In order to prolong the life span of a turbo-generator plant and sustain its performance at high efficiency, it is subjected periodically to regular test to monitor the operational profile and efficiency of power conversion from mechanical energy to electrical energy. Analysis of these test data serves as a measure to indicate deviation from normal operation profile and deterioration of plant performance. This present work implemented the heat balance tests process to three turb- generator units in order to assess the harmony, consistency, and accuracy of results to establish parallel correlation for the test process. The test process involves carrying out a heat balance for the turbo-generators at 50%, 75% and 100% load respectively through the determination of the heat losses through the hydrogen coolers, bearing oil, seal oil and radiation and convention to the atmosphere. Some important results were presented in the paper.
Highlights
Turbo-generators are usually used to produce electricity by using a turbine to drive an alternative current (a.c) generator
The objective of the study is the implementation of the heat balance testing process to three turbo-generator units in order to assess the harmony, consistency and accuracy of results to establish parallel correlation for the test process
There is no significant variation of the efficiency value between the units as they fall within the same range
Summary
Turbo-generators are usually used to produce electricity by using a turbine to drive an alternative current (a.c) generator. The choice of machinery for high power generation currently comes down to either hydrogen cooled. The world powered engineering has experienced an increase in the demand for high powered turbo-generators with hydrogen and air cooling [2], for the generation of electric power for the sustenance of vital national production processes and services. Turbo-generators convert mechanical energy of rotation of the turbine shaft into electricity. The a.c generator consists principally of a magnetic circuit, direct-current (d.c) field winding, a-c armature winding and a mechanical structure including a cooling and lubricating system. The magnetic circuit and field winding are arranged so that as the machine rotates, the magnetic flux linking the armature windings change cyclically, thereby inducing alternating voltage in the armature winding
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