Abstract
In this report, the authors discussed the temperature difference between mean room air temperature θ^^-_<im> and mean outdoor temperature θ^^-_0 in a day, the controlled room air temperature θ^^-_<is> and the amount of the week's consumed fuel W in the partially and intermittently heated houses. Annual consumption of fuel can be obtained by the degree-days method with the following results. 1) ⊿W/⊿(θ^^-_<im>-θ^^-_0)=const. 2) When the ratio k can be obtained, θ^^-_<is> can be calculated by the next equation. θ^^-_<is>=θ^^・_<is>+a・θ^^-_0, θ^^・_<is>=θ^^-_<is> (θ^^-_0=0). 3) If the temperature difference⊿θ_n from the free heat can be assumed by the measured results, the required fuel w in a day shall be inferred by the next equations. p=(θ^^-_<im>-θ^^-_0-⊿θ_n)/(θ^^-_<is>-θ^^-_0-⊿θ_n), w=p(θ^^-_<is>-θ^^-_0-⊿θ_n)⊿W/⊿(θ^^-_<im>-θ^^-_0). The annual consumption of fuel in the partially and intermittently heated houses is sometimes bigger than that of the entirly and continuously heated houses, mostly because of the insufficient insulation. The thermal living condition in such houses is not very good. But if extra heat is slightly supplied at night, the strong radiation from a stove will be reduced and the thermal living condition in the daytime will be better than that in the case of the intermittent heating. In any case, the thermal living condition or the amount of consumed fuel is not only affected by the thickness of thermal insulation but also by the type of heating system and the heating custom. And the thicker the thermal insulation gets, the better the thermal living condition will be. The common interest in the room temperature will change from the mere warmth around a stove to the thermal living condition of the whole house in the future.
