13 外気温による室内気温の振巾比と位相差 : P-Φ曲線について

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  • 13) SOME RELATIONS BETWEEN AMPLITUDE RATIO AND PHASE ANGLE OF A ROOM TEMPERATURE BY SINSOIDAL CHANGE OF OUTDOORTEMPERATURE
  • 外気温による室内気温の振巾比と位相差
  • ガイキオン ニ ヨル シツナイ キオン ノ シンプクヒ ト イソウサ

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They are called P-Φ curves, and available for deciding a few insulation characters of the buildings such as quantity of heat loss through walls (Qw), Ventilations (Qv) or loss by heat capacities of inner articles (Qc). These curves are based on the theory by proof. T. Maeda and a few development were made by author. These are as follows: (Fig. 6-3 & Graph. 4) P-Φ curve where Qv=0, Qc=0, are called "Standard P-Φ curves". If the thickness of the wall goes to large, the standard curves become closely to the inclination of the infinite thick wall. (Fig. 6-3 & Graph 5) When the heat losses occur by ventilation or thin wall, the point K_0 which is on the standard curveline will move to the point K_m along arc-like curveline. This is called Ventilation line and it vanishes to the origin point when the Qv goes infinite, "m" is the ratio of Qv/Qw. (Fig. 7-3 & Graph 6 or after) The point Km changes to the point K_n along a capacity curve line by the quantity of inner capacity such as room air and light articles. Where "n" is the ratio of Qc/Qw. (Fig. 9-1) The capacity curve which through the origin is called the "Limiting curve line" or the "Measuring line". The intersection point between the limiting line and a ventilation line is called the "Measuring point". All the capacity curve lines which start from any point on a certain ventilation line will meet at the "measuring point Kx. (Fig. 9-1) P-Φ point of a given room will be limited to the hatched zone in this graph, whenever there are no heavy articles in the room. (Fig. 11-1) If two points R_1, R_2 are measured (they are to be in the other side of the limiting line) by a methods of "changing of a quantity of ventilation", the equivalent mean thickness of the sourounding walls will be found easily. (Fig. 11-2) The same with Fig. 11-1, but by the method of "changing of a quantity of heat capacity in the testing room.

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