Experimental and Theoretical Investigation of Reducing Energy Consumption for a Building using Geothermal Water through the Glass

Abstract

Electricity consumption is the main criterion for identifying green buildings that contribute to the sustainable development of the world. The aim of this study was to reduce the utilization of electrical energy by air-conditioning devices, by decreasing heat gain via the glass of buildings. The study found that the maximum energy consumption for air conditioners was 48% of total energy in a building. The glass significantly contributes to waste and electrical energy heat loss by heat transfer to the inside of the building. The study showed that the largest surplus of cooling load for a glass type (triple glazing 4/12/4/12/4mm air-filled clear glass) is 44.7 tons, and the lowest simple payback period is 2.19 years for glass type double glazing 5/12/5 mm air-filled clear glass, when the current glass in the building was replaced with six different types of glass. Finally, double glass is improved by adding geothermal water into the heat sink, to remove some of the heat that comes from out. Experimental and numerical results (ANSYS-15) showed that the use of geothermal water decreased heat transfer through glass by nearly 6%.

Numerical Investigation of the Effect of Changes in Glass Typeon the Cooling Load in a Building

“…The reduction in cooling load due to the replacement of glass type has also been reported by several experts, including Venkiteswaran et al [2], Albab & Adi [4] and Shaik et al [22], namely 9.5%, 6.2% and 18.9%, respectively. This material replacement is also more effective when compared to the method of flowing water between the glass layers, as reported by Imran et al [21], which was only able to reduce 6%. Research by Shen & Li [20] using double-glazing windows with cooling pipes embedded in venetian blinds reported a 13% reduction in solar energy transmitted into the building.…”

“…Shen & Li [20] conducted research using double glazing window embedded pipes, they reported that the developed method can absorb solar radiation up to 60%. Furthermore, Imran et al [21] reported that the use of triple glass filled with water can reduce the cooling capacity by 44.73 TR, while the use of 6 mm clear single glass can only reduce the cooling capacity by 2.3 TR. Using different types of glass in window glazing, Shaik et al [22] reported that the use of polymer dispersed liquid crystal glazing on window glass can reduce the cooling load by 18.9% compared to windows using clear glass.…”

Experimental Investigation of a Split Air Conditioning Using Condensate as Direct Evaporative Cooling

“…Air conditioning systems are the major energy consumers in office building, hotel, central library, hospital, shopping mall, residential and others building. Many literatures reported that in commercial building, air conditioning systems account almost half of the total power consumption, and being the single biggest consumers [1][2][3][4][5][6]. It is also found that another building consumes more than 50%-70% for HVAC (Heating, Ventilating, and Air Conditioning) of total electrical energy use [7][8][9].…”