«Energy Technologies and Resource Saving» 2-2016
Soroka B.S.1, Doctor of Technical Sciences, Shandor P.2, PhD, Vorobiov M.V.1, Candidate of Technical Sciences, Karabchievskaya R.S.1
1 The Gas Institute of National Academy of Science of Ukraine, Kiev
39, Dehtiarivska Str., 03113 Kyiv, Ukraine, e-mail: email@example.com
Optimum Energo-Ecology Ltd.,
Natural Gas Saving by Replacement the Last for Process Gases While Heating Middle and High Temperature Furaces. Part 2. Numerical Determination of Fuel Flow Rate, of Fuel Use Energy and Environmental Characterstics by Assignment of Fuel Type and Composition
The technique for calculation of need fuel flow rate and for proper combustion heat flow has been advanced in frame of new author’s (B.S. Soroka) methodology of fuel replacement that takes the second law of thermodynamics into account along with the first law. Method for calculation the rate of available enthalpy flow of fuel-oxidant mixture has been developed. An impact of fuel replacement on formation the harmful substances by gas fuels combustion in the furnaces has been studied. The concept of new approach to interchangeability of fuel gases is grounded upon condition of conservation the rate of useful total enthalpy flow under fuels substitution. The last value accounts the fuel use efficiency. Numerical calculations of saving or overexpenditure the natural gas (NG) for the cases of total or partial NG substitution by process gases have been fulfilled. The calculations of the available heat flows of fuel-oxidant mixture and of combustion heat flow of the analyzed low-calorific fuels have been carried out for the cases of NG replacement with the process gases depending on the content (volume fraction) of blast furnace gas (BFG) in mixtures with natural (NG + BFG) or coke oven (COG + BFG) gases. Evaluation of formation and of specific effluents of pollutants: carbon dioxide Ñ²CO2 as a greenhouse gas and nitrogen oxides C²NOx as the most representative harmful substance — has been carried out along with computations of fuel flow rate and with energy using characteristics of low calorific mixed fuels. Bibl.12, Fig. 7, Tab. 2.
Key words: alternative gas fuels; available thermal energy, blast furnace gas; substitution of fuels; coke oven gas, heat-treating furnace, natural gas saving, secondary energy resources, specific emissions of harmful substances.
Semenenko N.A., Cooperman L.I., Romanovsky S.A. Secondary energy sources and
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6. Soroka B. Combined power and environmental optimization of fuel-oxidant composition and initial parameters: thermodynamic approach and industrial validation, International Journal of Energy for a Clean Environment, 2008, 9, Iss. 1–3, pp. 65–89.
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Soroka B.S. Intensification of Processes in Fuel Furnaces,
11. Framework Convention on Climate Change, United Nations, Conference of the Parties Twenty-first session, Paris, 30 November to 11 December 2015, 32 p. — Access mode: https://unfccc.int/resource/ docs/2015 /cop21/eng/l09r01.pdf
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Krushnevich S.P., Candidate of Technical Sciences, Pyatnichko A.I., Candidate of Technical Sciences, Zhuk H.V., Doctor of Technical Sciences, Soltanibereshne M.A., PhD Student
The Gas Institute of National Academy of Sciences of Ukraine, Kiev
39, Degtyarivska Str., 03113 Kiev, Ukraine, e-mail: firstname.lastname@example.org
Use of Pressure on the Gas Distribution Stations for Power Generation at Peak Periods
Before serving natural gas from the main gas pipeline to the consumer, he passes several stages of pressure reduction in the gas distribution stations. Reducing the pressure of natural gas is producing a significant amount of energy of cold. To prevent hydrate formation, gas is preheated to temperature which is guaranteed higher than expected point of hydrate formation on pressure reducer output. Reducing of pressure causes loss of potential energy, which was previously used for the compression of natural gas and in additional costs of natural gas for heating. If replace pressure reducer to expander, the energy from the gas pressure reducing can be partially repaired and used as the energy which was previously expended in compressing the gas. Negative factor of using of the expander is increase the temperature difference between its input and output to 5–8 times in comparison with the throttle, which requires increase to 7–11 times the volume of gas that is used to preheat the gas to an expander. For correct comparison, the authors carried out a fuel-economic calculation rational utilization pressure differential with the prices level of energy carriers in Ukraine in January 2016. Another positive factor in the production of electricity using the gas distribution stations is a partial compensation of peak loads on the electricity network of Ukraine, as natural gas consumption during peak periods also increases. Bibl. 8, Fig. 2, Tab. 2.
Key words: the gas distribution stationsh, hydraulic structures, electricity generation, energy utilization, pressure drop, natural gas.
Chernih A.P. Yspol’zovanye perepada davlenyja
GazKondNeft’. Programmnaja systema dlja komp’juternogo modelyrovanyja
tehnologyj promislovogo sbora y obrabotky pryrodnogo
4. U 2015 roci Ukrai’na skorotyla vykorystannja pryrodnogo gazu na 21 %, NAK «Naftogaz Ukrai’ny». — Access mode: http://www.naftogaz.com/
5. ÝG-1000, «Prezydent-Neva» Energeticheskyj centr. — Access mode: http://www.powercity.ru/site/ru/ catalog/48.html
6. Gazoturbynnye dvygately dlja yspol’zovanyja v gazotransportnyh setjah, «Zorja»–«Mashproekt», 2007, 16 p.
7. Taryfy na elektrychnu energiju z 01.01.2016 roku. —Access mode: http://kyivenergo.ua/ee-company/ tarifi
8. Prejskurant na pryrodnyj gaz z 1 sichnja 2016 roku, NAK «Naftogaz Ukrai’ny». — Access mode: http://www.naftogaz.com/files/Informaion/Naftogaz-gas-prices-Jan-2016.pdf
Petrov S.V.1, Doctor of Technical Sciences, Olhovikov O.V.2, Candidate of Economic Sciences
1 The Gas Institute of the National Academy of Sciences of Ukraine, Kiev
39, Degtyarivska Str., 03113 Kiev, Ukraine, e-mail: email@example.com
2 The Center of Expert Technologies Ltd., Kiev
Plasma Chemical Processing of Water Solutions with Use of the Pulsed Electrical Discharge. Creation of the Industrial Equipment (Review)
On the basis of modern representations about laws of underwater discharge phenomena caused by Impulse voltages the scientific and technical substantiation of construction of system of plasma processing of water solutions with scaling prospect on the big productivity is executed. The special attention is given to generating of highly reactionary plasma with low power consumption. It is reached at the expense of a number of technical decisions. The first - resonant split of an impulse into two channels. Thus from one source of power supply is generating two independent electric discharges with energies ~ 1 J are raised. The second - creation in interelectrode gaps of conditions for burn of the independent electrical discharges on borders of phase transition. Thus all volume of a processed solution is effectively sated with radicals OH. Besides, self-fixing (maintenance of average concentration of the OH in all volume of a solution) is provided at the expense of an optimum ratio of duration of an impulse to frequency. The sample of pilot installation aimed at large-scale use is created. The given hardware executed in modular version, is easily built in systems of processing of water solutions for purification of heavy metals, radionuclides, salts of rigidity, disinfection etc. Bib. 27, Fig. 8, Tab. 1.
Key words: the pulsed electrical discharge, a bubbled water solution, radicals OH, breakdown.
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Water Treatment, Thesis Submitted to
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Petrash V.D., Doctor of Technical Sciences, Professor, Polomanniy A.A., PhD Student, Basist D.V., Candidate of Technical Sciences
Odessa State Academy of Construction and Architecture
4, Didrihson Str., 65029 Odessa, Ukraine, e-mail: firstname.lastname@example.org
Fuel Economy During Heat Supply for Buildings with Indoor Swimming Pools under the Conditions of Joint Operation of Heat Pump Plant and Standard Heat Generator
High-performance heat supply for swimming pools is determined by conditions of energy-saving heat consumption within the whole process of maintaining the set temperature of water in the swimming pool and environment in rooms with multi-stage air exchange. The authors have developed the heat pump system to heat the water consumed in the building, which allows both simultaneously and alternately recovering the heat of waste water and air flows of exhaust system of ventilation. The fuel economy during heat supply for buildings with indoor swimming pools under the conditions of joint operation of heat pump plant and standard heat generator was determined for the suggested system on the basis of research results. The dependencies of gas fuel economy on conversion ratio as well as minimal values of conversion ratios on gas fuel cost are determined at different electricity tariffs. Taking into account current ratio of electricity costs and gas fuel costs the economy is about 58–86 % for realistically reachable values of conversion ratios j = 4–6. Bibl. 5, Fig. 3.
Key words: heat pumps, heat recovery, fuel economy, heat supply.
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Petrash V.D. Teplonasosnye sistemy teplosnabzhenija,
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Bilousova N.A., Candidate of Technical Sciences, Herasymenko Yu.S., Doctor of Technical Sciences, Professor, Red’ko R.M., Vichkan I.Yu.
National Technical University of Ukraine «KPI», Kiev
37, Peremohy Ave, build. 4, 03056 Kiev, Ukraine, e-mail: email@example.com
Modeling of Growth and Evaluation Anticorrosive Properties of Scale
The work concerns investigation of scale formation in the mode of boiler water with high hardness and definition of efficiency anticorrosive antiscalant action. The experimental setup and method of determining the specific rate of scale formation and steel corrosion rates under controlled water supply, which provides a constant concentration of hardness salts, and a maximum rate of scale deposition, as well as the constancy of the concentration of antiscalant were developed. The functional dependencies of the specific scale mass gains in time for the investigated antiscalant HEDP, LWCh-1.1 (based on organophosphonates) and SeaQuest (based on polyphosphate) are linear. The structure and anticorrosive properties of the formed scale depend not only on the nature and concentration of antiscalant, but also from the fresh water replenishment rate. In comparative tests with the same concentrations of reactants it found that the best inhibitory and anti-scale properties have HEDP in the water with hardness of 20.2 mM/dm3. The developed technique and produced dependencies allow predicting antiscale and anticorrosive action of reagents for boiler of small power plants that operate without water treatment during the heating season. Bibl. 11, Fig. 4.
Key words: scale, scale growth rate, antiscalant, corrosion rate.
DNAOP 0.00.-1.26-96, [Terms of design and safe operation of steam boilers with steam pressure not
exceeding 0.07 MPa (0.7 kgf/cm2),
boilers and water heaters heat water
with a temperature no higher than 115
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Sklyarenko E.V., Bileka B.D., Doctor of Technical Sciences
Institute of Engineering Thermophysics of National Academy of Sciences of Ukraine, Kiev
2a , Zhelyabova Str., 03057 Kiev, Ukraine, e-mail: firstname.lastname@example.org. Ua
Experimental Study of Thermochemical Conversion Process for Plant Biomass into Combustible Gas and Biocarbon on Installation of Screw Type
Installation of screw type that implements the technology of thermochemical conversion of small fraction plant biomass into combustible gas and biocarbon is proposed. The technology is based on the use of high-speed pyrolysis of biomass in combined heating and filtering high temperature products of incomplete combustion of hydrocarbon gas through the pressed movable layer. Temperature distribution of conversion products and their output along the reactor length depending on process temperature, dwell time, heat transfer medium parameters and initial plant biomass are investigated on the basis of the developed mathematical model. The results of theoretical and experimental studies of the basic regime parameters of process are presented. Bibl. 11, Fig. 4.
Key words: biomass, thermochemical conversion, pyrolysis, filtration of the gas heat medium, screw reactor.
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