Engineering Projects Area, Industrial Engineering School, University of Extremadura, 06007 Badajoz, Spain.
Int J Environ Res Public Health. 2020 Apr 13;17(8):2658. doi: 10.3390/ijerph17082658.
Hospitals need to prepare large amounts of domestic hot water (DHW) to develop their healthcare activity. The aim of this work was to analyse potential savings that can be achieved by installing solar thermal energy for production of domestic hot water in the hospitals of Extremadura (Spain). For this purpose, 25 hospitals between 533 and 87,118 m and between 15 and 529 beds were studied, three solar factor scenarios were simulated (0.70, 0.75 and 0.80) and the necessary investment and corresponding economic and environmental savings were calculated. Better economic results and energy ratios for 70% of solar contribution were obtained. These results show an average payback of 4.74 years (SD = 0.26) reaching 4.29 kWh/€ per year (SD = 0.20). Undertaking an investment of 674,423 €, 2,895,416 kWh/year of thermal energy could be generated with which to save both 145,933 € and 638 tons of CO per year. It was statistically demonstrated the priority of carrying out an installation with a solar factor of 70%, investing preferably in hospitals in Cáceres over those in Badajoz, especially in the public sector with more than 300 beds. These findings will provide hospital managers with useful information to make decisions on future investments.
医院需要准备大量的生活热水（DHW）来开展医疗保健活动。本工作的目的是分析在西班牙埃斯特雷马杜拉（Extremadura）的医院中安装太阳能热能生产生活热水可实现的潜在节约。为此，研究了 25 家医院，面积在 533 至 87118 平方米之间，床位在 15 至 529 张之间，模拟了三种太阳能系数情景（0.70、0.75 和 0.80），并计算了所需的投资和相应的经济和环境节约。对于太阳能贡献的 70%，获得了更好的经济结果和能量比。这些结果表明，平均投资回收期为 4.74 年（SD=0.26），达到每年 4.29 千瓦时/欧元（SD=0.20）。通过投资 674423 欧元，可以产生 2895416 千瓦时/年的热能，每年可节约 145933 欧元和 638 吨二氧化碳。统计证明，优先安装太阳能系数为 70%的系统是合理的，最好在卡塞雷斯的医院而不是巴达霍斯的医院进行投资，特别是在拥有 300 多张床位的公共部门。这些发现将为医院管理人员提供有关未来投资决策的有用信息。
