Wyniki wyszukiwania - BazTech

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Możliwość wykorzystania ciepła odpadowego w przemyśle mineralnym

Głodek-Bucyk Ewa

Szkło i Ceramika

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2021

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R. 72, nr 1

25--27

PL

W artykule przedstawiono możliwość zwiększenia efektywności energetycznej w przemyśle poprzez wykorzystanie ciepła odpadowego. Obecnie istnieje znaczny potencjał wykorzystania ciepła odpadowego w przemyśle, które nie jest w pełni wykorzystywane. Ciepło to nie jest wykorzystywane ze względu na bariery techniczne, ekonomiczne oraz lokalizacyjne. Do konwersji ciepła odpadowego do innych użytecznych form energii wykorzystuje się technologie aktywne i pasywne. Dobór odpowiedniej technologii zależy w dużej mierze od temperatury czynnika. W przypadku branży cementowej i szklarskiej do dyspozycji jest ciepło średnio lub wysokotemperaturowe, które można wykorzystać do wytworzenia energii elektrycznej.

XX

The article prsesents possibility of increasing energy efficiency in mineral industry through the use of waste heat. Nowadays there is a significant amount of waste heat that is not fully exploited. It is related to technical, economic and location barriers. Passive and active technologies are used to convert waste heat to other useful forms of energy. The selection of apropriate technology depends heavily on the temperaturę of the medium. In the cement and glass industries there is medium and high temperature waste heat that can be used to produce electricity.

2

Expanders for dispersed power generation: maintenance and diagnostics problems

Żywica G., Kaczmarczyk T., Ihnatowicz E.

Transactions of the Institute of Fluid-Flow Machinery

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2016

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nr 131

173--188

EN

The article discusses the problems related to the operation of various types of expansion devices used in small cogeneration systems. Both volumetric and dynamic expanders were considered, including scroll, screw, vane, piston and turbine expanders. For each of these solutions, principles of operation were explained as well as major advantages and disadvantages. The results of experimental research on several expanders of various types were also presented. The overview of expanders included in this paper, along with basic operational problems and functional characteristics, is the collection of valuable information facilitating selection of a suitable expander for speciﬁc applications. This is particularly important in the context of search for new energy sources and opportunities to improve the energy eﬃciency of available energy resources.

3

Prototype of the domestic CHP ORC energy system

Kicinski J., Zywica G.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2016

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Vol. 64, nr 2

417--424

EN

The Institute of Fluid-Flow Machinery (IMP PAN) in Gdansk pursues its own research in fields such as technologies that use renewable energy sources efficiently, including in particular the small-scale combined heat and power (CHP) systems. This article discusses the design concepts for the prototype of small CHP ORC (organic Rankine cycle) energy system, developed under the research project. The source of heat is a boiler designed for biomass combustion. Electricity was generated using specially designed oil-free vapour micro-turbine. The turbo-generator has compact structure and hermetical casing thanks to the use of gas bearings lubricated by working medium. All energy system components are controlled and continuously monitored by a coherent automation and control system. The article also discusses selected experimental results conducted under laboratory conditions. Thermal-flow tests were presented that allow for an assessment of the operation of energy system components. Additionally, energy performance results of the turbo-generator were given including power obtained at various cycle parameters. The achieved results have shown that the developed energy system operated in accordance with design solutions. Electricity derived from the energy system prototype was around 2 kW, with boiler’s thermal power of 25 kW. The research has also confirmed that this system can be used in a domestic environment.

4

Investigation the effect of selected design and operating parameters on the dynamic properties of the steam micro turbine

Żywica G., Kiciński J.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

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2014

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nr 145

123--125

EN

The topic of the article is the analysis of the influence of selected design parameters and operating conditions on the radial steam micro-turbine, which was adapted to operate with low-boiling agent in the system based on the ORC. In the following parts of this article the results of the thermal load analysis, the residual unbalance and the stiffness of bearing supports are discussed. Studies showed that the steam micro-turbine is characterized by very good dynamic properties and is resistant to extreme operating conditions. The prototype of micro-turbine has passed a series of test calculations. It has been found that it can be subjected to experimental research in the micro combined heat and power system.

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System and turbine parameters of Organic Rankine Cycles

Milewski J., Badyda K., Miller A.

Prace Naukowe Politechniki Warszawskiej. Konferencje

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2007

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T. 1, z. 25

357-366

EN

Three conffgurations of ORC system were analyzed: power plant heated by hot-water (geothermal source of heat), power plant with biomass fired boiler and combined heat and power plant with biomass fired boiler. Those configurations were tested with five different working fluids: water, iso-butane, iso-pentane, propane, and ammonia. In sum, fifteen systems were analyzed and compared. Each system was optimized to obtain the highest electric efficiency. The primary variable of the optimizing proces was the the pressure at the turbine inlet. Nominal parameters of the turbinwe for all systems are indicated and described. The advantages and disadvantages of the ORCs with five different working fluids are given. The pressure ratio, specific power, evaporation and condenser pressures, and theoretical electric efficiency of the analyzed ORCs are given and described in this paper. If a Iow temperature heat source is used, there is a Iow potential of obtaining high efficiency. A measure of effectiveness, defined as a ratio of electric efficiency and Carnot efficiency, was used as an additional parameter to compare the systems.

PL

Przeanalizowano trzy konfiguracje układu ORC: elektrownie zasilaną przez źródło geotermalne, elektrownię zasilaną kotłem na biomasę oraz elektrociepłownię zasilaną kotłem na biomasę. Wszystkie trzy układy zostały dla pięciu czynników roboczych: pary wodnej, Izo-butanu, Izo-pentanu, propanu i amoniaku. W sumie, analiza dotyczyła piętnastu różnych układów ORC, każdy z tych układów został zoptymalizowany pod kątem osiągnięcia najwyższej sprawności produkcji energii elektrycznej. Parametrami podlegającymi optymalizacji były ciśnienia na wlocie i wylocie z turbiny. Wyniki optymalizacji zostały przedstawione i opisane.