A generalized correlation for two-phase forced flow heat transfer—second assessment

Experimental investigation of forced flow boiling of nitrogen in a horizontal corrugated stainless steel tube

“…7(a)). Hence, with the same increase exponent of the pressure in the heat transfer correlation, the increase exponent of the heat flux in our experiments agrees well with that in the correlation by Klimenko [14].…”

“…Besides, the value of 0.67 by Cooper's correlation [21] for nucleate boiling HTCs is also adopted by many researchers such as Wojtan [22] and Gungor [23]. The average HTCs in the present experiment are compared with the predicted HTCs from the correlation for the nucleate boiling proposed by Klimenko (listed in Table 4) [14]. The experimental data agrees well with the predicted results (see Fig.…”

“…Considering vertical and horizontal cases separately, he proposed the corresponding correlations for both the forced convection and nucleate boiling regimes for the vertical and horizontal tubes. Klimenko [13,14] proposed a generalized correlation with a maximum ±14.4% inaccuracy based on the experimental data of forced flow boiling heat transfer of cryogens and ordinary fluids in the vertical and horizontal tubes with the entire channel circumference wetted.…”

Prediction of risers’ tubes temperature in water tube boilers

“…Some of these correlations have been widely tested and used. Examples of these are the models of Bjorge et al [18], Chen [19], Gungor and Winterton [20], Kandlikar [21], Klimenko [22,23], Shah [24,25] and Steiner and Taborek [26]. A comparison of these models with experimental data of Ha and Bergles [27] was conducted by Darabi et al [28].…”

Analysis on heat transfer effect of air-temperature vaporizer in LNG satellite station

“…The heat transfer process of LNG is related to the flow pattern of fluid flow. [16][17][18][19] LNG from the bottom into the finned tube, along the length of the part to absorb external heat, continuous vaporization of bubbles, with the endothermic process continued, bubble formation and growth, gradually rising, jumping off, change the heat transfer process and the flow chart is shown in Figure 2. Figure 2 shows that when the fluid is in the A part, the temperature is lower than the bubble point temperature and the wall temperature is lower than the bubble point temperature; thus, no vaporization occurs, the fluid flow and single-phase liquid flow pattern for the same, forced convection heat transfer of the single-phase fluid, the heat transfer coefficient is relatively low; when the fluid is in the B part, the tube wall temperature is higher than the liquid bubble point temperature, on the wall of bubbles and gradually enter the mainstream region, this time in the subcooled boiling, the fluid flow pattern is a fine bubble, the heat transfer coefficient increases; when the fluid is in the C part, the temperature of the liquid reaches the saturation temperature, liquid vaporization bubble, the bubble is saturated boiling, fluid flow is still a fine bubble, the sudden increase in heat transfer coefficient; when the fluid is in the D part, the temperature of the liquid and the wall temperature are almost the same, the heat absorbed to the vaporization of liquid, so the percentage of bubbles increases, the flow pattern is slug flow, the main heat transfer for saturated bubble boiling heat transfer, heat transfer coefficient is relatively stable, but larger; when the fluid is in the E part, the temperature is the same as D part, the difference is that the fluid flow pattern for annular flow, heat transfer in forced convection heat transfer of liquid film; when the fluid is in the F part, temperature is the same as the D part, the difference is that the fluid flow pattern for entrainment-shaped annular flow, heat transfer in forced convection heat transfer of liquid film; when the fluid is in the G part, the liquid in the tube is almost completely evaporated, and the steam tube wall contact heat transfer, the tube wall temperature increases, air liquid by heating and evaporating, flow pattern as the mist, the heat transfer coefficient increases sharply; when the fluid is in the H area, all the droplet in the air evaporated, so the heat transfer in this area is a single-phase gas convection heat transfer, and the heat transfer coefficient is small.…”