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Material and design analysis of external baffles in inventory buildings with consideration of optimization of usable energy consumption

Wiśniewski Krzysztof, Witkowska-Dobrev Joanna

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2019

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Vol. 28, No. 4

557--568

EN

The main objective of the performed investigations was an analysis of baffles of various construction and production technology with respect of usable energy demand. The investigations encompassed calculations of the energetic performance of fatteners’ piggery building as well as heat and humidity calculations of baffles. The energetic calculations were performed for two variants of execution and heat insulation of external baffles as well as two variants of roofs. The analysis contained the baffles made in two technologies: industrialized and traditional modernized, for three climate zones. For the individual variants, the usable energy demand in heating season as well as specific usable energy demand per one fattener were calculated.

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Computational Characterization of a Potential Energetic Compound: 1,3,5,7-Tetranitro-2,4,6,8-tetraazacubane

Politzer P., Lane P., Murray J. S.

Central European Journal of Energetic Materials

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2011

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Vol. 8, nr 1

39-52

EN

The high densities and (strain-induced) enthalpies of formation of cage-type molecules have drawn attention to their polynitro derivatives as potential energetic materials. Several such compounds have been synthesized, including octanitrocubane and hexanitrohexaazaisowurtzitane. One that has not yet been prepared but has evoked continuing interest is 1,3,5,7-tetranitro-2,4,6,8- tetraazacubane. Some years ago, on the basis of a very high estimated density (about 2.19 g/cm3), it was predicted to have detonation properties greatly superior to those of HMX. We have now used computational procedures developed since that time to reassess the expected detonation performance of this compound. We find: density, 1.940 g/cm3; solid phase enthalpy of formation at 298 K, 757 cal/g; detonation velocity, 9.8 mm/µs; detonation pressure, 444 kbar; impact sensitivity, h50 ∼ 40 cm. These are all better than the corresponding values for HMX, but not by as much as had been estimated earlier.

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Zwiększenie efektywności energetycznej i ekonomicznej skojarzonego wytwarzania ciepła i energii elektrycznej przez zastosowanie zasobnika ciepła

Kostowski W., Kalina J., Skorek J.

Ciepłownictwo, Ogrzewnictwo, Wentylacja

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2005

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R. 36, nr 5

8--14

PL

Omówiono zagadnienia związane z zastosowaniem zasobników ciepła w układach z gazowymi modułami kogeneracyjnymi. Przedstawiono bilans energii oraz uwarunkowania energetyczne pracy układu z zasobnikiem ciepła. Zaproponowano metodykę oceny efektywności energetycznej systemu. Podano zasady optymalizacji termodynamicznej i ekonomicznej doboru zasobnika. Przeprowadzono przykładową analizę doboru zasobnika w ramach projektu demonstracyjnego małej elektrociepłowni z silnikiem gazowym. Praca wykonana w ramach projektu badawczego nr 4 T10B 022 25 finansowanego ze środków Komitetu Badań Naukowych. Autorzy wyrażają podziękowania za dofinansowanie badań.

EN

The problems regarding the appliance of heat storage bins in systems utilising gas co-generating modules are described. The energy balance and energy requirements for the operation of a system with a heat storage bin are presented. The thermodynamic and economic optimisation principles of bin selection are also included. An example of bin selection analysis is given as part of a demonstrative design of a small thermal-electric power station with a gas engine.