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When modeling a generator as part of an absorption heat pump, DWSIM calculates an incorrect temperature value for the output current.
The input flow is a mixture of lithium bromide and water at a certain concentration. When energy is added, water is vaporized and the concentration in the liquid phase increases. At the same time, the boiling temperature also rises with increasing lithium bromide concentration. In my case, the correct calculation should result in an initial concentration of 62.50 % lithium bromide with a boiling temperature of approximately 150 °C.
The module therefore iterates incorrectly and uses the overall concentration of the system for the calculation, which logically does not change. The resulting output stream therefore has the temperature of the boiling point of the input concentration. However, the decisive factor for the calculation is the concentration in the liquid phase and the associated boiling temperature.
CoolProp Incompressible Mixtures was used as the property package, as it is the only one that can be used to calculate lithium bromide water mixtures. 404.pdf
The text was updated successfully, but these errors were encountered:
When modeling a generator as part of an absorption heat pump, DWSIM calculates an incorrect temperature value for the output current.
The input flow is a mixture of lithium bromide and water at a certain concentration. When energy is added, water is vaporized and the concentration in the liquid phase increases. At the same time, the boiling temperature also rises with increasing lithium bromide concentration. In my case, the correct calculation should result in an initial concentration of 62.50 % lithium bromide with a boiling temperature of approximately 150 °C.
The module therefore iterates incorrectly and uses the overall concentration of the system for the calculation, which logically does not change. The resulting output stream therefore has the temperature of the boiling point of the input concentration. However, the decisive factor for the calculation is the concentration in the liquid phase and the associated boiling temperature.
CoolProp Incompressible Mixtures was used as the property package, as it is the only one that can be used to calculate lithium bromide water mixtures.
404.pdf
The text was updated successfully, but these errors were encountered: