.SolarTherm.Models.CSP.CRS.Receivers.ChlorideSaltReceiver

Information

ChlorideSaltReceiver models the heat transfer characteristics of an external tubular receiver with a user-defined geometry by employing simple energy and mass balances, an average temperature for receiver external surface, and heat transfer correlations. The receiver ChlorideSaltReceiver model has the following connectors:

• A HeatPort interface. According to the Modelica sign convention, a positive heat flow rate Q_flow (in Watts) is considered to flow into the receiver.
• A Real_input for the ambient temperature (in K).
• An inlet FluidPort_a and an outlet FluidPort_b. Each fluid connector has three stream variables (h_outflow, Xi_outflow and C_outflow) associated with the flow variable m_flow. These variables represent the specific enthalpy, the mass fractions and the concentrations associated to m_flow <0.

The model requires to define the following parameters:a Medium package from the Media library. The default medium package is the MoltenSalt_ph.

• H_rcv: Receiver height, in meters. Default: 1.0 m.
• D_rcv: Receiver diameter, in meters. Default: 1.0 m.
• N_pa: Number of panels of the receiver. Default: 20
• D_tb: Outer diameter of receiver tubes, in meters. Default: 25e-3 m (1 mm).
• t_tb: Wall thickness of receiver tubes, in meters. Default: 1e-3 m (1 mm).
• ab: Coating absorptance of the receiver. Default: 1.0.
• em: Coating emmitance of the receiver. Default: 1.0.
• const_alpha: Boolean, true if external convective heat transfer. Default: true.
• alpha: Heat transfer coefficient due to external convection, in W/(m2.K). Default: 30.0 W/(m2.K).

Revisions

• Jan 2020 by Armando Fontalvo:
  Created.