Post on 26-Feb-2023
Outline
Co Relation for Spiral Plate Heat ExchangerRangasamy RAJAVEL 2014Department of Mechanical Engineering, AMET University, Chennai, India Original scientific paper
DOI: 10.2298/TSCI130317131R Sarma et al. Correlation 2006
For Subcooled CHF calculation
Co Relation for Spiral Plate Heat Exchanger
Experimental set-up Width of 304 mm Stainless Steel plate thickness of 1mm. The total heat transfer area is 2.24m2. Radius of curvature of 172.9 mm; The gap between the plate is 4 mm, 5 mm, and 6 mm. The flow rate was maintained between 0.2 and 1.0 kg/s.
Heated between 60 and 80 °C using a steam boiler.
Co Relation for Spiral Plate Heat Exchanger
Empirical correlation has been developed based on the experimental data. It was found that correlation of the type as
For Water System The Co relation is
This is Applicable in the following Range
Co Relation for Spiral Plate Heat Exchanger
Results The majority of the data falls within ±4%of the proposed correlation
The discrepancy between the experimental data and the predicted results is due to the difference in the configurations of test sections, the difference in the wall boundary conditions and uncertainty of the correlations
Sarma et al. Correlation 2006 Developed a subcooled CHF correlation (related to
Nuclear H T), by dimensional analysis of the CHF phenomena and heat balance,
and determined the constants in the equation by regression analysis of 3050 measured CHF data points, getting a mean deviation of 17 %.
It uses P in bar, D in meter, Lh in meter, liquid viscosity μ in Pa-s, mass flux G in kg/m2-s, and hfg in kJ/kg, giving
qc in kW/m2. The liquid viscosity μ is evaluated at the inlet temperature if P > 10 bar, and at the
saturation temperature if P ≤ 10 bar According to the Equation the CHF increases with diameter
as D^0.29. At constant G, P, Ti, and Lh, the CHF increases with increasing diameter while at constant G, P, Xo, the CHF decreases with increasing diameter2.