Table 1 Specified parameters.

\(C_{h}\) \({\text{kW}}/{\text{K}}\)

\(C_{r}\)\({\text{kW}}/{\text{K}}\)

\(C_{l}\)\({\text{kW}}/{\text{K}}\)

\(F\) \({\text{m}}^{2}\)

\(U_{h}\)\({\text{kW}}/\left( {{\text{K}}\;{\text{m}}^{2} } \right)\)

\(U_{r}\)\({\text{kW}}/\left( {{\text{K}}\;{\text{m}}^{2} } \right)\)

\(U_{l}\)\({\text{kW}}/\left( {{\text{K}}\;{\text{m}}^{2} } \right)\)

\(T_{i}\)\({\text{K}}\)

\(T_{o}\)\({\text{K}}\)