48. 大会要求就各项可能备选方案进行详细分析，以实现有关提高能效和减少建筑物运行所造成的影响的目标，因此项目小组着手分析利用光伏能源的可行性。智利能源部利用卫星信息测量的天气数据和一份关于光伏发电潜力的报告2 显示，圣地亚哥市阴天占比低(年均 10%)，为利用太阳辐射发电的光伏电厂提供有利条件。北楼项目光伏发电厂估计费用 900 000 美元。发电厂将提供大楼全部能源负荷，目前每年费用 70 000 美元。
48. In line with the General Assembly’s request to present a detailed analysis of the range of possible options to meet the objectives relating to energy efficiency and reducing the environmental impact of the building’s operation, the project team set out to analyse the feasibility of using photovoltaic energy. The weather conditions measured by the Ministry of Energy of Chile, through satellite information and on the basis of a report on the potential for photovoltaic electricity generation, 2 show that the low percentage of cloudy days in the city of Santiago (10 per cent yearly average) provides favourable conditions for a photovoltaic plant, which would transform solar radiation into electricity. The estimated cost of the photovoltaic plant for the North Building project is $900,000. This plant will supply the total energy load of the building, which today costs $70,000 annually.