Buildings.Fluid.SolarCollectors.Controls

Package for solar thermal collector controllers

Information

This package contains a controller for solar thermal collectors.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
CollectorPump	Controller which activates a circulation pump when solar radiation is above a critical level
Examples	Examples for solar thermal collector controller models
BaseClasses	Package of BaseClass models used to create the models in the Controls package

Buildings.Fluid.SolarCollectors.Controls.CollectorPump

Controller which activates a circulation pump when solar radiation is above a critical level

Information

Pump on/off controller for a solar thermal system.

This controller outputs whether the pump should be commanded on or off based on the incident solar radiation, the collector inlet temperature, and the system parameters. The pump is commanded on when the incident solar radiation is greater than the critical radiation plus the offset delQ_flow, and it is switched off if the incident solar radiation is below the critical radiation.

The critical radiation is defined per Equation 6.8.2 in Duffie and Beckman (2006). It is

G_TC=(F_RU_L (T_In-T_Env))/(F_R(τα))

where G_TC is the critical solar radiation, F_RU_L is the heat loss coefficient, T_In is the inlet temperature, T_Env is the ambient temperature, and F_R(τα) is the maximum efficiency.

References

J.A. Duffie and W.A. Beckman 2006, Solar Engineering of Thermal Processes (3rd Edition), John Wiley & Sons, Inc.

Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).

Parameters

Connectors

Modelica definition