An Assessment of Transport Property Estimation Methods for Ammonia–Water Mixtures and Their Influence on Heat Exchanger Size

摘要: Transport properties of fluids are indispensable for heat exchanger design. The methods estimating the transport ammonia–water mixtures not well established in literature. few existent developed from none or limited, sometimes inconsistent experimental datasets, conducted liquid phase only. These datasets usually confined to low concentrations and temperatures, which much less than those occurring Kalina cycle boilers. This paper presents a comparison various used estimate viscosity thermal conductivity mixtures. Firstly, different introduced compared at temperatures pressures. Secondly, their individual influence on required size (surface area) is investigated. For this purpose, two case studies related use considered: flue-gas-based recovery boiler combined power plant hot-oil-based solar plant. property resulted larger differences high pressures possible discontinuous first derivative, when using interpolative contrast corresponding state methods. Nevertheless, all mixture combinations herein within 4.3 % difference flue-gas boiler, 12.3 % oil-based boiler.