modelISO9806HeatLossValidation

Validation variant with term‑by‑term breakdown of ISO9806:2017 standard thermal heat loss

Extends from IDEAS.Fluid.PVTCollectors.BaseClasses.ISO9806HeatLoss.

Information

Extends from the standard quasi‑dynamic heat‑loss model (IDEAS.Fluid.PVTCollectors.BaseClasses.ISO9806QuasiDynamicHeatLoss). For validation purposes, this block adds:

  • A term‑by‑term breakdown of each thermal loss contribution;
  • Cumulative sums showing how each additional term builds up to the total heat loss.

Components

TypeNameDefaultDescription
Modelica.Units.SI.Powera1_a2_termContribution from a1_a2 term
Modelica.Units.SI.Powera3_termContribution from wind-speed dependence (a3)
Modelica.Units.SI.Powera4_termContribution from sky long-wave (a4)
Modelica.Units.SI.Powera6_termContribution from wind–irradiance coupling (a6)
Modelica.Units.SI.Powera7_termContribution from wind–irradiance dependence of IR radiation exchange (a7)
Modelica.Units.SI.Powera8_termContribution from radiation losses (a8)
Modelica.Units.SI.IrradianceEL_termSky long-wave irradiance difference (HHorIR – σ·TEnv⁴)
Modelica.Units.SI.Powerpvt_st_sta1_a2
Modelica.Units.SI.Powerpvt_a3a1_a2 + a3
Modelica.Units.SI.Powerpvt_a4a1_a2 + a3 + a4
Modelica.Units.SI.Powerpvt_a6a1_a2 + a3 + a4 + a6
Modelica.Units.SI.Powerpvt_a7a1_a2 + a3 + a4 + a6 + a7
Modelica.Units.SI.Powerpvt_a8a1_a2 + a3 + a4 + a6 + a7 + a8

Revisions

  • March 11, 2026, by Lone Meertens:
    Updated thermal formulation from ISO 9806:2013 to ISO 9806:2017. This is for #1473.
  • July 7, 2025, by Lone Meertens:
    First implementation PVT model. This is for #1436.