Analysis of dynamic processes of heat energy accumulation in the centralized heating systems
Journal Title: Проблеми загальної енергетики - Year 2015, Vol 0, Issue 2
Abstract
Use of thermoelectric generators in the centralized heating systems for the regulation of frequency and real power in Ukraine's interconnected system represents one of the most promising areas. The cyclical pattern of their operation brings about significant fluctuations in thermal capacity at the heating network inlet. To mitigate these fluctuations, it is necessary to employ technologies providing storage of thermal energy in the networks. Significant capacity fluctuations at the heating network inlet will trigger off dynamic processes, which are currently understudied, and this may affect the reliability of the heating supply systems. The purpose of this work is to determine the temperature and capacity behavior at the heating network inlet in case of thermal power storage, as well as the factors which have impact thereon. Dynamic process analysis enabled obtaining analytic expressions for the coolant temperature in the feeding and reverse pipelines, the capacity and the rate of its change at the heating network inlet in the process of thermal power storage. It was established that in the process of thermal power storage in the networks, the coolant temperature will grow in linear fashion in the feeding pipeline, and stepwise in the reverse pipeline. It is demonstrated that the only factors affecting the maximum capacity at the heating network inlet and the rate of its change are the coolant flow and the rate of its temperature change. It has been established that the capacity at the heating network inlet will be increasing at the beginning of storage, and decreasing after the rates of change of coolant temperatures in the feeding and reverse pipelines become equal. After the coolant arrives from the last valve of the passage system, the capacity gain will become zero (the storage process will be finished).
Authors and Affiliations
Volodymyr Derii
Keywords
Related Articles
- EP ID EP507966
- DOI 10.15407/pge2015.02.057
- Views 85
- Downloads 0
Features of prolongation of the service life of high- and intermediate-pressure rotors of K-200-130 steam turbine of Luhansk TPP
At present, there is a significant quantity of DTEK “Energo” power units that already worked for their park lifetime. In particular, this concerns the K-200-130-3 steam turbine of 9th power unit of DTEK “Luhansk TPP”. Th...
Mathematical model of the optimization of the technological development of coal mining in Ukraine
We have developed a mathematical model of the optimization of the technological development of coal mining, which is focused on increasing the production efficiency of mines by the criterion of their overall output. The...
Assessment of the state of coal industry in the temporarily occupied territories of Donbas
The war with Russia in the Ukrainian Donbas has significantly worsened the situation in domestic coal industry. In the occupied areas of Donbas, the coal industry in fact turned out in a catastrophic state, and the mines...
Mathematical model of the optimal structure of coal production for thermal power plants of Ukraine with taking into account environmental constraints
The aim of this study is to develop a mathematical model of the delivery of coal production for TPP under conditions of possible import supply and own products with minimal financial expenditures at certain levels of the...
Features of the joint operation of district heating systems and electric heat generators in the control of load on the UPS of Ukraine
We analyze the modes of joint operation of electric heat generators intended for regulating load on the United Power System of Ukraine during its "nighty depressions" and district heating systems. The analytical dependen...