HTRI-2005年成都年会培训材料.ppt

Fluid Properties Module 3 Fluid PropertiesModule 3 Objectives Describe HTRI methods to specify fluid properties grid properties component-by-component Give practical guidelines to best specify fluid properties Develop grid properties for ammonia condenser Fluid Property Data Density Viscosity Pressure drop Specific heat Single-phase heat release temperature profile Thermal conductivity Heat transfer coefficient Heat Release Data Temperature/enthalpy/weight fraction vapor data Specific heat for single-phase Vapor-liquid equilibrium model for two-phase Temperature profile Mean temperature difference Fluid Property Options Mixture properties via grid User-specified heat release only Property generator button Mixture Properties via Grid TP Reference pressures (1 minimum, 12 maximum) Reference temperatures for each pressure (3 minimum, 30 maximum) Mixture Properties via Grid Heat Release Enthalpy for each reference pressure and temperature Weight fraction vapor for two phase Mixture Properties via Grid Property Grid Required properties are identified Mixture Properties via Grid Property Monitor shows grid established for case This example shows 2 pressures and 10 temperatures Property Monitor Mixture Properties via Grid Interpolation Methods Quadratic fit between reference temperatures Linear fit between reference pressures Built-in Property Generator VMGThermo Xchanger Suite 4.0 PPDS Discount available at Marketing@ REFPROP /srd/nist23.htm HYSYS AspenTech PRO/II Simulation Sciences Fluid Property Options Component by component Three heat release options Component by ComponentHeat Release Input Method User-specified Three or more enthalpies for each reference pressure Same as grid heat release method Component by ComponentHeat Release Input Method Specified dew/bubble point Dew point at outlet pressure Bubble point at inlet pressure Component by ComponentHeat Release Input Method Program-calculated Grid generated at 12 pressures and 30 temperatures Pure com