Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: correlation equation

Sortuj według:

Ogranicz wyniki do:

Pool boiling of nanofluids on rough and porous coated tubes: experimental and correlation

Cieśliński J. T., Kaczmarczyk T. Z.

Archives of Thermodynamics

2014

Vol. 35, no. 2

3--20

The paper deals with pool boiling of water-Al2O3 and water-Cu nanofluids on rough and porous coated horizontal tubes. Commercially available stainless steel tubes having 10 mm outside diameter and 0.6 mm wall thickness were used to fabricate the test heater. The tube surface was roughed with emery paper 360 or polished with abrasive compound. Aluminium porous coatings of 0.15 mm thick with porosity of about 40% were produced by plasma spraying. The experiments were conducted under different absolute operating pressures, i.e., 200, 100, and 10 kPa. Nanoparticles were tested at the concentration of 0.01, 0.1, and 1% by weight. Ultrasonic vibration was used in order to stabilize the dispersion of the nanoparticles. It was observed that independent of operating pressure and roughness of the stainless steel tubes addition of even small amount of nanoparticles augments heat transfer in comparison to boiling of distilled water. Contrary to rough tubes boiling heat transfer coefficient of tested nanofluids on porous coated tubes was lower compared to that for distilled water while boiling on porous coated tubes. A correlation equation for prediction of the average heat transfer coefficient during boiling of nanofluids on smooth, rough and porous coated tubes is proposed. The correlation includes all tested variables in dimensionless form and is valid for low heat flux, i.e., below 100 kW/m2.

Impact of limestone grinding degree on the volume of the absorption suspension tank in flue gas desulphurization systems

Głomba M., Szmigielska E.

Environment Protection Engineering

2011

Vol. 37, nr 2

99-107

The impact of the reagent (limestone) grinding degree, of its dissolution rate and pH of the absorption suspension used in flue gas desulfurization systems on the working volume of the reactor tank in the flue gas SO 2 absorption unit has been discussed. A correlation equation, defining the dependence of the reactor tank working volume on the parameters under investigation has been presented.

Stopień zatrzymania gazu w półtechnicznych kolumnach air-lift

Dziubiński M., Sowiński J.

Inżynieria Chemiczna i Procesowa

2001

T. 22, z. 3B

415--420

Wykonano pomiary stopnia zatrzymania gazu dla półtechnicznej kolumny air-lift o cyrkulacji zewnętrznej. Zaproponowano bezwymiarową postać równania korelacyjnego opisującego stopień zatrzymania gazu w póltechnicznej kolumnie air-lift.

Experimental investigation of gas holdup in pilot plant air-lift column were carried out. Correlation equation describing gas holdup have been proposed.