| 摘要 |
PURPOSE:To know an exact heat accumulating residue by sampling the temperatures of latent heat accumulating capsules near the heating medium inlet and heating medium outlet and obtaining their average and calculating the calorie which has gone out of a heat accumulating tank by taking the average temperature as the variable of a three dimensional function and subtracting the result of the calculation from the total amount of heat accumulation which a heat accumulating tank has. CONSTITUTION:In general the heat capacity Q which a latent heat accumulating tank has can be expressed by a three dimensional function: Q=f(t)=At<3>+Bt<2>+Ct and D (A, B, C, D are constants) for the latent heat accumulating capsule temperature t. The temperature of the latent heat accumulating capsule has the largest variation near the heating medium inlet and outlet when the temperature giving and receiving for the latent heat accumulating capsule is considered, and at other positions the heat accumulating capsules are considered to have an intermediate variation to those variations. The temperature parameter to know the heat accumulation residue for the whole heat accumulating tank can be approximately known by knowing the average of the sum of the capsule temperatures at the above-mentioned positions. A temperature sensor is installed and the temperature information from this sensor is inputted to a sum average calculation circuit 4 and its output is inputted to a heat quantity calculation circuit, and the result thus obtained is compared by an approximate curve representing the state of being left to cool and a comparison circuit, and the heat accumulation residue is displayed digitally in Table 7. |
