Condensation of a refrigeration medium in the presence of an inert gas

Bohdal, T.; Matysko, R.

doi:10.1016/j.applthermaleng.2006.01.009

Cited by 12 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a properly selected system affects not only the heat transfer process with the ambient, but also the efficiency of the refrigerators. The negative effect of the air presence in the condenser on the condensation process of the refrigeration medium proves a decrease in the heat transfer coefficient, enlargement of the condensation zone, and an increase in the flow resistance in the multiphase multi-component flow system [15]. Another issue seems to be the influence of hydrodynamic instabilities on heat transfer intensity during the condensation of refrigerants [16].…”

Section: Introductionmentioning

confidence: 99%

Free convection on a refrigerator’s condenser

Orzechowski

Stokowiec

2014

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. The paper presents the measurement of heat transfer coefficient for the refrigerator's condenser in free convection regime. The water was pumped through the steel coils of heat exchanger with a constant flow rate and its temperature was kept at a demanded value by means of ultrathermostat. The research was conducted in stationary conditions which were controlled by a continuous measurement of the water temperature at inflow and outflow to the heat exchanger. The temperature distribution at the external condenser surface was registered by means of an infrared camera. Single elements used to the analysis were selected using the thermogram registered. In free convection regime and in case of small temperature change the heat transfer coefficient value can be calculated by comparing the measured temperature area with analytical solution describing one-dimensional temperature distribution along the rib. The accuracy of the proposed method for measuring the heat transfer coefficient was examined by comparing the heat transferred to the air and the heat lost by water flowing through the spiral of heat exchanger. An error between these two parameters is about 6%.

show abstract

Section: Introductionmentioning

confidence: 99%

Free convection on a refrigerator’s condenser

Orzechowski

Stokowiec

2014

EPJ Web of Conferences

View full text Add to dashboard Cite

show abstract

“…In particular, with the development of seawater desalination and the nuclear power industry, the condensation heat transfer with a non-condensable gas is becoming a research focus. Earlier results studied few possibly trace amounts, of non-condensable gases [4,8] , geometries [16][17][18][19][20][21][26][27][28] , and flow patterns [6,29] , while only a few experiments involved the condensation heat transfer process with a high fractional non-condensable gas [7,15,[30][31][32][33][34] . The general trend the research follows is: attaining a more reasonable experimental system design, and then increased reliability of the measurement of variable parameters, especially the temperature of the condensing plate, temperature of the bulk vapor mixture, and gas-liquid interface temperature.…”

Section: ．Introductionmentioning

confidence: 99%

“…Oh and Revankar [18] conducted experiments for a steam-air mixture condensation with secondary pool cooling, in place of the previous jacket cooling. Tadeusz [19] showed the dependence of air concentration on the R404A in a tubular channel. With a decrease in pressure of 30%, the heat transfer coefficient for 2.5% mixtures decreased 20% to 50% more than those for a pure refrigeration medium.…”

Section: ．Introductionmentioning

confidence: 99%

Condensation of steam with high CO2 concentration on a vertical plate

Wang

Zhao

et al. 2016

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

The effect of a non-condensable gas on steam condensation has been studied. From experimental and theoretical studies to date, clear evidence of significant heat transfer deterioration by the non-condensable gas can be seen. The deterioration varies with the concentration of the non-condensable gas, geometric parameters, system pressure, etc. However, these data and correlations may be unreliable due to the high concentration of CO 2 in the vapor mixture and lack of verification through experiments. In this paper, a systematic investigation has been conducted for film-wise condensation using a vapor mixture of steam and a high concentration of CO 2 . Some data were obtained on a vertical plate, with the average vapor velocity of 1.2 m/s, CO 2 mass fraction of 20%-94% and a pressure of 1 atm. The effects of CO 2 concentration and surface sub-cooling on heat transfer characteristics have been investigated. Moreover, the relevant parameters such as gas/liquid film resistance were included in the description of the condensation phenomenon. The developed correlation for steam and a high concentration of CO 2 , based on experimental results, has a standard deviation of less than ±20%.

show abstract

Experimental Study on Distribution Characteristics of Condensate Droplets Under Ultrasonic Vibration

Leigang

Shi

et al. 2018

Microgravity Sci. Technol.

View full text Add to dashboard Cite

Condensation of a refrigeration medium in the presence of an inert gas

Cited by 12 publications

References 7 publications

Free convection on a refrigerator’s condenser

Free convection on a refrigerator’s condenser

Condensation of steam with high CO2 concentration on a vertical plate

Experimental Study on Distribution Characteristics of Condensate Droplets Under Ultrasonic Vibration

Contact Info

Product

Resources

About