Wymiana ciepła w miniskraplaczach chłodniczych

• Autorzy: Bohdal T. , Charun H. , Sikora M. , Flis M. , Jurek T.

Warianty tytułu

EN

Heat transfer in the refrigerant minicondensers

• Języki publikacji: PL

Abstrakty

PL

Przeprowadzono analizę stanu wiedzy w zakresie badań skraplania czynników chłodniczych w miniwymiennikach ciepła, tzw. multiportach. Wskazano kierunki dalszych badań w tym zakresie. Przedstawiono wyniki badań własnych skraplania czynników chłodniczych R134a, R404A i R407C w miniskraplaczach wykonanych w postaci dwóch pęczków minikanałów rurowych wykonanych ze stali nierdzewnej o średnicy wewnętrznej d - 0,64 mm i długości L = 100 mm. Wymiennik MULTI-4 składał się z 4 minikanałów, a MULTI-8 zawierał 8 minikanałów. Wyznaczono wartości średnie współczynnika przejmowania ciepła w całym procesie skraplania (x = 1+0). Zilustrowano wpływ stopnia suchości pary czynnika oraz gęstości strumienia masy na intensywność wymiany ciepła. Przeprowadzono analizę porównawcza wyników badań dla różnych czynników chłodniczych w obu miniwymiennikach ciepła.

EN

An analysis of the knowledge state in research of refrigerants condensation in mini-heat exchangers, so-called multiports, were made. Di-rections for further research in this field were indikated. Authors presented results of refrigerant R134a, R404A and R407C condensation in a mini-condensers made of two bundles tubular minichannels from stainless steeł with an inside diameter d = 0.64 mm and length L = 100 mm. Exchanger MULTI-4 consisted of four minichannels, and MULTI-8 contained of 8 minichannels. The values of average heat transfer coeficient throughout the condensation process (x = l * 0) were nominated. The impact of the refrigerant vapor quality and the mass flux density on the heat transfer intensity were illustrated. A comparative analysis of test results for various refrigerants in both mini-heat exchangers were made.

Słowa kluczowe

PL

wymiana ciepła; mikroskraplacze chłodnicze

EN

heat transfer; refrigerant minicondensers

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Chłodnictwo : organ Naczelnej Organizacji Technicznej
• Rocznik: 2012
• Tom: R. 47, nr 3
• Strony: 10--16
• Opis fizyczny: Bibliogr. 43 poz., rys.

Twórcy

autor

Bohdal T.

autor

Charun H.

autor

Sikora M.

autor

Flis M.

autor

Jurek T.

• Politechnika Koszalińska, Katedra Techniki Cieplnej i Chłodnictwa

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