In this study we grasped about the priority of the disaster medical service of 14 disaster base hospitals and the necessary medical equipment and make a survey and analyze about electricity consumption accompanying with it, to estimate the appropriate capacity of a private power generator becoming necessary for correspondence at hospitals at the time of disaster. The obtained knowledge is shown below. The ratio of the private power generator to the contract demand of the 14 hospitals that the answer to the questionnaire was provided was from 43 to 155%, and considering the margin of the contract demand, most hospitals hold private power generators that has generation capacity of 60% degree of ordinary time. As a result of the medical equipment load that is assumed by each medical service contents at the time of the disaster calculated by per unit floor space, electricity consumption of emergency patient correspondence and the image diagnosis inspection were big , and the average electricity consumption of 5 hospitals were from 18.95 to 22.40 W/m2. From the results of estimating the medical equipment load corresponding to the priority of medical services, we found that the medical equipment load account for 51.8% to 120.4% of the capacity of private power generator and 44.5% to 86.3% of the contract demand, even performing duties only that has have the medical services also be always performed at the time of disaster.
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