The pressure drop for supercritical CO2 cooling in gas cooler tubes for heat pump applications
has been gained interest due to great variation in thermo-physical properties (specially in the pseudocritical region). This study presents a detailed comparison of pressure drop correlations available for supercritical CO2 cooling in mini and micro tubes. For the comparison, a general numerical model has been established for the gas cooler. The configuration considered her
The pressure drop for supercritical CO2 cooling in gas cooler tubes for heat pump applications
has been gained interest due to great variation in thermo-physical properties (specially in the pseudocritical region). This study presents a detailed comparison of pressure drop correlations available for supercritical CO2 cooling in mini and micro tubes. For the comparison, a general numerical model has been established for the gas cooler. The configuration considered here is a counter-flow, tube-in-tube type with CO2 gas flowing in inner tube and the secondary fluid (coolant) water flowing in the annulus. All the recommended pressure drop correlations developed for other fluids or correlations specially developed for CO2 cooling are based on the limited set of dimensions and operating conditions. So the correlations are required to be validated for other dimensions and conditions, because a more general correlation is needed for the design of an entire heat exchanger. A test facility has been developed to investigate the supercritical carbon dioxide cooling in tubes with water as coolant. Subsequently the correlations have been validated with the tested pressure drop data generated for convective gas cooling. This study is expected to help the design engineer by recommending an appropriate pressure drop correlation for actual gas cooler design to be employed in transcritical CO2 cycle based cooling-heating systems.
has been gained interest due to great variation in thermo-physical properties (specially in the pseudocritical region). This study presents a detailed comparison of pressure drop correlations available for supercritical CO2 cooling in mini and micro tubes. For the comparison, a general numerical model has been established for the gas cooler. The configuration considered here is a counter-flow, tube-in-tube type with CO2 gas flowing in inner tube and the secondary fluid (coolant) water flowing in the annulus. All the recommended pressure drop correlations developed for other fluids or correlations specially developed for CO2 cooling are based on the limited set of dimensions and operating conditions. So the correlations are required to be validated for other dimensions and conditions, because a more general correlation is needed for the design of an entire heat exchanger. A test facility has been developed to investigate the supercritical carbon dioxide cooling in tubes with water as coolant. Subsequently the correlations have been validated with the tested pressure drop data generated for convective gas cooling. This study is expected to help the design engineer by recommending an appropriate pressure drop correlation for actual gas cooler design to be employed in transcritical CO2 cycle based cooling-heating systems.
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By shecco , published Nov 04, 2016 - 0 pages
By shecco , published Nov 04, 2016 - 0 pages