Rury cieplne w inżynierii środowiska

Danielewicz, J.

Artykuł - szczegóły

Tytuł artykułu

Rury cieplne w inżynierii środowiska

Autorzy

Danielewicz J.

Identyfikatory

Warianty tytułu

Heat pipes in the environmental engineering

Języki publikacji

Abstrakty

Przedstawiono możliwości wykorzystania rur cieplnych, wydajnych urządzeń do przekazywania ciepła, w inżynierii środowiska. Omówiono wyniki badań eksperymentalnych procesów wymiany ciepła podczas wrzenia i kondensacji w rurach cieplnych. Badano rury cieplne z czterema rodzajami struktur kapilarnych: spiekane, metalowe włókna, siatki metalowe, rowki wzdłużne oraz rowki z siatkami. Dla struktury kapilarnej w postaci spiekanych włókien opracowano równania empiryczne służące do wyznaczania wartości współczynników wnikania ciepła podczas wrzenia i kondensacji cieczy. Jako cieczy roboczych użyto wody, metanolu i etanolu, które mogą być używane w urządzeniach stosowanych w inżynierii środowiska. Przedstawiono również wyniki badań wymiennika ciepła zbudowanego z dwufazowych zamkniętych termosyfonöw. Badania te posłużyły do weryfikacji modelu wymiennika ciepła. Na podstawie zaproponowanego modelu opracowano program komputerowy do analizy pracy, doboru i optymalizacji konstrukcji wymienników ciepła zbudowanych z dwufazowych termosyfonów zamkniętych.

Highly effective devices for the heat transfer usage - heat pipes - in the environmental engineering are presented. Experimental results of heat exchange in boiling and condensation processes in the heat pipes were examined. Heat pipes with four different capillary structures were tested: longitudinal grooves, metal grids, grooves with grids and sintered metal fibres. For the capillary structure based on sintered fibres, the empirical formulas for the convective heat transfer coefficients in liquid boiling and condensation were developed. As the working fluid water, methanol and ethanol were chosen as the agents which could be applied in the installations used in the environmental engineering. The results of examination of the heat exchanger made of two-phase closed thermosyphons are also presented. The tests were done in order to verify the model of the heat exchanger. On the basis of the model proposed, a computer program for optimization of to work and selection, analysis and to construction optimization of the heat exchangers made of two-phase closed thermosyphons and heat pipes was created.

Słowa kluczowe

rura cieplna wymiennik ciepła termosyfon dwufazowy

Wydawca

Oficyna Wydawnicza Politechniki Wrocławskiej

Czasopismo

Prace Naukowe Instytutu Inżynierii Ochrony Środowiska Politechniki Wrocławskiej. Monografie

Rocznik

2002

Tom

Vol. 74, nr 41

Strony

5--98

Opis fizyczny

Bibliogr. 91 poz.

Twórcy

autor

Danielewicz J.

Katedra Klimatyzacji i Ciepłownictwa Wydziału Inżynierii Środowiska Politechniki Wrocławskiej, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław.

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