METHOD FOR MEASURING ENERGY IN HEAT SUPPLY SOURCES
Objectives. This study was aimed at determining the actual flow rate of a gaseous working fluid by the pressure drop in the constriction device with its changing parameters (speed, pressure, temperature, gas composition).Method. Since the pycnometric method provides high accuracy in determining the...
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| Format: | Article |
| Language: | Russian |
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Daghestan State Technical University
2020-01-01
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| Series: | Vestnik Dagestanskogo Gosudarstvennogo Tehničeskogo Universiteta: Tehničeskie Nauki |
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| Online Access: | https://vestnik.dgtu.ru/jour/article/view/723 |
| Summary: | Objectives. This study was aimed at determining the actual flow rate of a gaseous working fluid by the pressure drop in the constriction device with its changing parameters (speed, pressure, temperature, gas composition).Method. Since the pycnometric method provides high accuracy in determining the density and is simpler than the calorimetric method for determining the calorific value, the value of the latter can be checked using the dependence proposed in the article. In the event of a discrepancy between the calculated value of the calorific value and the experimentally obtained value of more than 0.5%, the determination of the calorific value and the density should be repeated. The relationship between the density and calorific value of a gas is subject to verification and refinement when gas from other fields is used. In all cases, a sampler should be used to accumulate an average gas sample over an appropriate period of time. The methodological error in calculating the amount of gaseous working fluid can be eliminated or reduced by using a computer as part of an automated heat supply enterprise management system.Results. It was established that the calorific value of energy fuels non-linearly depends on the hydrogen and carbon contained therein; a formula has been developed to describe this relationship. When studying the energy characteristics of fuels, a previously unknown regularity was established: hydrocarbons ethylene, benzene and annelated hydrocarbons (naphthalene, anthracene, naphthacene, etc.) form the homologous series CnH(n+6)/2 with the homological difference C4H2, while all other series of hydrocarbons have a homological difference CH2.Conclusion. The greatest difficulties consist in accounting (measuring) the amount of energy contained in the fuel used at TPPs, mainly natural gas, and the coolant, since there are no appropriate technical means for direct measuring the amount of a particular type of energy. The developed theoretical provisions make a certain contribution to the development of the scientific foundations of heat and gas supply, increase accuracy and reduce the complexity of calculating the technical and economic indicators of thermal power plants and boiler houses. |
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| ISSN: | 2073-6185 2542-095X |