Wyniki wyszukiwania - BazTech

1

Rękaw renowacyjny : wyniki testów nadal na wysokim poziomie

Waniek R. W., Homann D., Grunewald B.

Inżynieria Bezwykopowa

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2016

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nr 2

38--46

PL

Próbki rękawów renowacyjnych przyjęte do badań pochodziły z sześciu krajów. Wyniki testów nadal pozostają na wysokim poziomie, jednak grubość ścianki często była poniżej wartości oczekiwanej. Instytut wskazuje również na dobre rezultaty uzyskiwane przez firmy zagraniczne.

EN

CIPP-liner samples from six countries tested. Test results still at high level. Only wall thicknesses are more frequently below target. Most non-German companies also score well. The IKT - Institute for Underground Infrastructure hereby presents its twelfth annual LinerReport. The report is based on just on 2,150 CIPP-liner samples taken for quality control purposes on project sites and tested by the IKT CIPP Liner Test Centre in 2015.

2

Graficzna interpretacja wpływu parametrów systemów: pozyskiwania i wykorzystania energii geotermalnej na efektywność pracy ciepłowni z ilościową regulacją sieci

Nowak W., Wiśniewski S.

Technika Poszukiwań Geologicznych

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2007

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R. 46, nr 1

25-33

PL

W niniejszej pracy autorzy dokonali graficznej interpretacji oceny wpływu parametrów systemów: pozyskiwania i wykorzystania energii geotermalnej na efektywność pracy rozpatrywanej ciepłowni geotermalnej. W tym celu wykorzystano wyniki obliczeń prezentowane w pracy Nowaka i Wiśniewskiego (2005) dotyczące ciepłowni geotermalnej opisanej w drugim rozdziale artykułu. Na podstawie tych wyników zostały sporządzone odpowiednie wykresy dwu- i trójwymiarowe pokazujące wpływ poszczególnych parametrów na ilość wykorzystanej energii geotermalnej w rozpatrywanej ciepłowni. Schemat ciepłowni, charakterystyka odbiorników nisko- i wysokotemperaturowych oraz zakres parametrów wody geotermalnej i wody sieciowej przedstawione są w kolejnych rozdziałach artykułu. W ostatnim rozdziale przedstawiono także interpretację uzyskanych wyników obliczeń i wnioski.

EN

In the present work authors conducted graphical interpretation of the influence of parameters of different systems for acquisition and utilization of geothermal energy on the effectiveness of operation of considered geothermal heating station. In that respect utilised have been the results of calculations presented in (Nowak, Wisniewski 2005), regarding geothermal heating plant, described in section two. On the basis of these results constructed have been relevant two and three dimensional charts showing the influence of particular parameters on the amount of utilized geothermal energy in the considered heating plant. Schematic of heating plant together with characteristics of low temperature and high temperature receivers as well as the range of parameters of geothermal and municipal water have been presented in subsequent sections of the paper. In the concluding section presented also has been interpretation of obtained results of calculations and resulting conclusions. The graphical interpretation of results of the conducted analysis regards a geothermal heating plant supplying two groups of heat receivers, namely the high-temperature and low-temperature heat receivers, connected in parallel. In the considered case of geothermal heating plant, it has been assumed that the control of the amount of supplied district heating occurs by means of variation of municipal water flowrate. Such way of control is specified as qualitative control and is realized by means of control systems adjusting the rotational velocities in both circulation pumps, i.e. municipal water and geothermal water. In the qualitative control the temperature of municipal water for the supply and return heat receivers does not depend on external temperature and remains constant in the entire heating season. Flowrates of municipal water for each group of heat receivers vary linearly. The highest values of water flowrates refer to the lowest external temperature [...] The presented graphical presentation of results in the form of two and three dimensional diagrams enables an easy interpretation of the influence of particular parameters on the amount of utilized geothermal energy. Such presentation of results enables a quick assessment of the effectiveness of a particular variant of a heating plant, at specified parameters of acquisition and utilization systems of geothermal energy.

3

Methodology of thermal-hydraulic calculations of geothermal power plant with a qualitative control of district heating network supplying two groups of heat receivers

Nowak W., Wiśniewski S.

Archives of Thermodynamics

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2006

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Vol. 27, no. 4

157-168

EN

Present paper is a continuation and modification of the problems presented in [1]. In that paper presented have been ready-to-use relations enabling determination of the amount of utilized geothermal heat in the thermal plant cooperating with the district heating network in accordance to the schematic presented in Fig. 1. Presented relations enable determination of such heat for different variants and sub-variants which have been discussed in detail in the present paper. A variety of variants and the differences in final relations for determination of the amount of acquired geothermal heat result directly from relations between specific parameters of the systems for acquisition and utilization of geothermal energy. These relations have been derived for the assumptions presented in sections 1 and 2.