Heat pumps complex for recycling of secondary energy resources of petrochemical plants

Cultivation of agricultural crops in winter season is carried out in special greenhouses. For heating greenhouses, a huge amount of heat energy is consumed. In the conditions of Turkmenistan, up to 1500 tons of standard fuel per year is consumed to heat the greenhouse with an area 1 hectare. The increase in heating costs leads to an increase in the prices of grown products. Therefore, saving fuel energy in the greenhouses is one of the most important economic factors. Possibilities of using the heat of the combustion products of steam boilers at the Mary State Electric Power Station (Turkmenistan) for heating greenhouses are discussed in the article. For this purpose, a special contact heat exchanger is installed on the line of the outgoing combustion products of steam boilers. In the experimental facilities, water is injected from top to bottom, and combustion products move in the opposite direction. In this case, the temperature of the combustion products decreases from 120-150 °C to 30-40 °C. The temperature of the cooling water of the combustion products rises from 10-20 °C to 40-45 °C. To increase the contact surface of water and gas in a contact heat exchanger, spray-type layer conductor is used. A distinctive feature of the experimental facility is the use of local materials as a spray-type layer with a conductor. For subsoil heating of greenhouses, water is supplied with the temperature of 40 °C, and for the raise of the vegetables grown in them water is supplied with the temperature of 22-25 °C. The use of the heat of combustion products to heat greenhouses is of great importance both for saving fuel and for purifying the environment from harmful emissions.

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Research on the issue of using the heat of combustion products for heat supply of greenhouses

Nazarov

Rakhimov

Hojageldiyev

2021

E3S Web Conf.

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Development of a direct flow pyrolysis plant for pyrogenetic decomposition of wood

Таймаров

Чикляев

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. Consider a renewable energy source. Compare the proposed design with other pyrolysis technologies and make sure that the proposed design will reduce fuel consumption. METHODS. This article proposes the design and technological principle of the process of pyrogenetic wood processing with the production of various compositions of pyrolysis gas and charcoal. RESULTS. The article describes the proposed design, calculates the heat balance for it, and determines the operational parameters of the technological process. CONCLUSION. The main positive difference between the proposed plant design and technology from other pyrolysis technologies is a high level of fuel economy due to heat utilization at intermediate stages of the process. The heat of the cooled charcoa l and the waste products of complete fuel combustion are utilized. The developed design allows reducing fuel consumption, as well as the range of gaseous components obtained as a result of pyrogenetic decomposition of raw wood in a direct -flow pyrolysis plant can be increased.

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Project of using low-potential energy sources at the Bratsk hydro power plant

Yurovskaya

Latushkina

2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE. Improving the energy efficiency of a hydroelectric power plant (HPP). Determination of the volume of lost thermal energy from HPP equipment. Development of options for the beneficial use of low-grade heat. Economic evaluation of the proposed options. Selection of the most appropriate waste heat utilization option. METHODS. The methods of the theory of heat and mass transfer, thermodynamic analysis, technical and economic calculations in the energy sector are used in the work. RESULTS. The article determined the temperatures of heat carriers in the cooling system of the hydroelectric generator of the Bratsk HPP. Calculated heat losses in the amount of 92,52 MW. 3 variants of heat supply for the facilities of the Bratsk HPP have been laid. An optimized scheme of heat generation using a heat pump installation (HPI) has been developed. A feasibility study of the proposed options for heat supply has been carried out. An analysis of the Russian HPI market was carried out. A cost-effective heat supply option with 2 Viesmann Vitocal 350-G Pro HPI was selected for implementation with a capital investment 34,46 million of RUB and a payback period of 7,3 years. CONCLUSION. The results of technical and economic calculations show the feasibility of introducing a HPI into the heat generation system of the Bratsk HPP.

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Heat pumps complex for recycling of secondary energy resources of petrochemical plants

Cited by 3 publications

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Research on the issue of using the heat of combustion products for heat supply of greenhouses

Research on the issue of using the heat of combustion products for heat supply of greenhouses

Development of a direct flow pyrolysis plant for pyrogenetic decomposition of wood

Project of using low-potential energy sources at the Bratsk hydro power plant

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