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Energy-efficient retrofitting strategies for healthcare facilities in hot-humid climate: Parametric and economical analysis
Alexandria Engineering Journal ( IF 6.2 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.aej.2020.08.011
Micheal A. William , Aly M. Elharidi , Ahmed A. Hanafy , Abdelhamid Attia , Mohamed Elhelw

All living beings depend on energy for survival, and modern civilizations will continue to thrive only if existing sources of energy can be developed to meet the growing demand. With the universal urge to reduce power usage in the building environment, there are broad discrepancies between energy efficiency intention and the realistic operation of buildings. Implementing current mitigation strategies tends to be gradual and requires a ‘whole-system’ approach to the issue.

In Egyptian buildings, energy demand increased dramatically with the increasing necessity to acquire indoor thermal comfort conditions. Simultaneous growth in residential and commercial developments necessitate increasing power production to face new demands. Energy needs in facilities are growing annually due to the expansion in HVAC (Heating, Ventilation & Air Conditioning) systems operating hours. Minimizing power demand and encouraging the use of green energy sources, protecting the planet from global warming impacts, and depleting the ozone layer is beneficial.

High temperatures and high humidity levels in hot and humid climate zones such as Alexandria in Egypt cause human discomfort, resulting in high HVAC energy consumption. Apart from medical equipment, power, and infection controls, hospitals utilize substantial amounts of HVAC energy. To clarify Egyptian hospitals ' energy consumption, the on-going case study is conducted on a hospital accessible to the researcher at Alexandria, Egypt. The purpose of this study is to explore medical facilities' energy requirements and to assess the possible energy savings of present buildings in Egypt. Using the DesignBuilder simulator platform, a prototype was built for medical institution underdevelopment. Depending on the hospital’s construction, mechanical consultants’ documentation, and EUI, the model is validated. Firstly, the initial model is adjusted to the latest outdoor design conditions and weather database information endorsed by ASHRAE (American Heating, Refrigeration, and Air Conditioning Engineers Society) and NREL (National Renewable Energy Laboratory). Analysis of energy-efficient methods influencing yearly HVAC power utilization and total building power is examined. The analysis gives information about the increase in energy efficiency in medical institutions achieving thermal comfort in Alexandria that would allow designers to sufficiently limit buildings ' energy consumption.

For the autonomous temperature and moisture control and influence on the HVAC system, a DOAS (Dedicated Outdoor Air Systems) was introduced asserting substantial energy-savings for both HVAC and the entire building electricity utilization.

The study reveals that about 67% energy savings and operating costs can be achieved through efficient retrofitting and systems right sizing.

Through economic analysis, this study provides new energy opportunities for new medical facilities in hot-humid climatic regions.



中文翻译:

热湿气候下医疗机构的节能改造策略:参数和经济分析

所有生物赖以生存的能源,只有发展现有的能源来满足不断增长的需求,现代文明才能继续蓬勃发展。在减少建筑物环境中的电力消耗的普遍渴望下,能源效率意图与建筑物的实际运行之间存在着很大的差异。实施当前的缓解策略通常是循序渐进的,并且需要采用“整个系统”的方法来解决此问题。

在埃及的建筑物中,随着获取室内热舒适条件的需求的增加,能源需求急剧增加。住宅和商业发展的同时增长需要增加电力生产来面对新的需求。由于HVAC(供暖,通风和空调)系统运行时间的增加,设施中的能源需求每年都在增长。最小化电力需求并鼓励使用绿色能源,保护地球免受全球变暖的影响,并消耗臭氧层是有益的。

在炎热和潮湿的气候区(例如埃及的亚历山大港)中的高温和高湿度水平会导致人体不适,从而导致HVAC能耗较高。除了医疗设备,电源和感染控制外,医院还利用大量的HVAC能源。为了阐明埃及医院的能源消耗,正在进行的案例研究是在埃及亚历山大亚历山大的研究人员可以进入的医院进行的。这项研究的目的是探索医疗机构的能源需求,并评估埃及现有建筑物的节能潜力。使用DesignBuilder仿真器平台,为医疗机构开发不足构建了原型。根据医院的结构,机械顾问的文档和EUI,对模型进行验证。首先,初始模型将根据ASHRAE(美国供热,制冷和空调工程师协会)和NREL(国家可再生能源实验室)认可的最新户外设计条件和天气数据库信息进行调整。分析了影响年度HVAC电力利用率和建筑总功率的节能方法的分析。该分析提供了有关在亚历山大实现医疗舒适性的医疗机构中提高能效的信息,这将使设计人员能够充分限制建筑物的能耗。研究了影响年度HVAC电力利用率和建筑总功率的节能方法的分析。该分析提供了有关在亚历山大实现医疗舒适性的医疗机构中提高能效的信息,这将使设计人员能够充分限制建筑物的能耗。分析了影响年度HVAC电力利用率和建筑总功率的节能方法的分析。该分析提供了有关在亚历山大实现医疗舒适性的医疗机构中提高能效的信息,这将使设计人员能够充分限制建筑物的能耗。

为了自主控制温度和湿度并影响HVAC系统,引入了DOAS(专用室外空气系统),声称可大幅节省HVAC和整个建筑的电力利用。

该研究表明,通过有效的改造和正确调整系统尺寸,可以节省约67%的能源和运营成本。

通过经济分析,本研究为湿热气候地区的新医疗设施提供了新的能源机会。

更新日期:2020-09-01
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