Customized Simscape convective heat transfer component not working

Question

Roland 2022-8-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1782095-customized-simscape-convective-heat-transfer-component-not-working

回答： Yifeng Tang 2022-8-27

Hello, I am trying to create a custom simscape Convective Heat Transfer component that will allow me to use a variable convective heat transfer coefficient,

I have attempted to do so using the following code, but it isn't functioning as intended (heat flow is 0 regardless of temperature difference across it).

Is there something I am missing?

Thanks

component variableConvection
    % This component will use a variable heat transfer coefficient when
    % calculating the convective heat transfer
    inputs
        heat_tr_coeff = {0, 'W/(m^2*K)'}; % S:bottom
    end
    nodes
        A = foundation.thermal.thermal; % A:bottom
        B = foundation.thermal.thermal; % B:top
    end
    variables
        T = {0, 'K'}; % Temperature difference
        Q = {0, 'W'}; % Heat flow rate
    end
    parameters
        area          = {1e-4, 'm^2'      }; % Area
    end
    equations
        T == A.T - B.T;
        Q == area * heat_tr_coeff * T;
    end
end