Study on Estimation Procedures of Heating Requirements at Preheating Period

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  • 暖房予熱時の装置容量と予熱負荷係数の推定法に関する研究
  • ダンボウ ヨネツジ ノ ソウチ ヨウリョウ ト ヨネツ フカ ケイスウ ノ ス

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Heating requirements at a preheating period in the early morning could be estimated using the dynamic load calculation program such as HASP. However, it has been found that the program resulted in too large heating capacity due to neglecting the followings; 1) Operation of heating apparatus at full capacity during preheating period. 2) Thermal synthesized effect between perimeter and interior zones during the off-operation. 3) Increased capacity of heating coil while existing larger temperature difference between air and water than the designed value. 4) Allowable room temperature shift from the setpoint at the beginning of occupation. Authors gave those corrected algorithm to HASP load calculation program in the first place. Then, nine pre-studied factors were given together with the levels in values and combinations of each factor-level was decided by allocating L-81 orthogonal table in the experimental design method. Results of experiments with the load calculation program were analyzed statistically and significant factors on preheating capacity were chosen using analysis of variance. Two kinds of factorial effects were tabulated. One is the preheating capacity for unit area and the other is the preheating loadfactor for both perimeter and interior zones. The proposed method which use steady state calculation results and the prepared tables by authors will make it possible to estimate the preheating capacity easily and precisely.

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