Abstract
In this study, the economic and environmental impacts of insulation material are determined for different sizes of heating, ventilation and air conditioning (HVAC) duct. The optimum insulation thickness (OIT), energy-saving (ES) and payback period (PP) for HVAC duct are estimated using Life cycle cost (LCC) analysis. The analysis considers coal, natural gas (NG), liquefied petroleum gas (LPG), fuel oil (FO), bagasse, rice husk (RH) and geothermal as an energy source and the fiberglass as an insulation material. The results indicate the OIT and PP for an HVAC duct increase with the size of the duct while ES decreases. The maximum value of OIT, ES and minimum value of PP for different sizes and energy sources are determined as 48.27 mm in size A (300 mm) and NG, 84.91% in size E (500 mm) and LPG, and 0.2035 years in size A and NG, respectively. Additionally, the environmental analysis results indicate emission of CO2, CO and SO2 decreases with insulation thickness. The maximum value of CO2 and CO emission is determined for size E and NG i.e. 81.8% and SO2 emission for size E and FO i.e. 76.66%, respectively.
Highlights
Energy consumption (EC) is escalating throughout the globe due to rapid population growth, improvement in living standard and style of human beings, urbanization, and migration towards large cities and development in technologies [1]
This study investigates the environmental impacts of insulation thickness on different duct sizes of an air distribution system installed outside the building in a pharmaceutical company, in the city Jamshoro, Pakistan
natural gas (NG), liquefied petroleum gas (LPG), coal, fuel oil (FO), bagasse, rice husk (RH) and geothermal are considered as energy sources and fiberglass as an insulation material
Summary
Energy consumption (EC) is escalating throughout the globe due to rapid population growth, improvement in living standard and style of human beings, urbanization, and migration towards large cities and development in technologies [1]. They investigated that the use of geothermal energy for chiller/boiler operation produces both environmental and economic benefits His other study [12] investigates the effect of fuel inlet, stack gas and combustion chamber temperature and air-fuel ratio on OIT, ES and PP for different pipe sizes using energoeconomic and exergoeconomic method. The analysis considered coal as a fuel and expanded polystyrene as an insulation material He estimated that OIT reduces fuel consumption and the CO2 and SO2 emission by 46 and 41%. ANALYSIS OF AIR DISTRIBUTION SYSTEM A life cycle cost analysis considers the net saving resulting from a reduction in energy cost due to a decrease in fuel consumption with added insulation cost over the lifetime of an HVAC system. The working fluid and ambient air temperature and relative humidity are constant
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