9. Equation We write the balance of flows at the nodes θ i , θ s and θ m : {Hgei (θi−θeieq )+Hgis (θi−θs)                                         =ϕiHges (θs−θi)+Hgis (θs−θi)+Hgms (θs−θm)        =ϕsCmdθmdt+Hgem (θm−θem )+Hgms (θm−θs)              =ϕm...