Economic and Environmental Impacts of Thermal Insulation Used in Different Duct Sizes

Kumar, Dileep; Kumar, Sanjay; Bhayo, Bilawal A.; Harijan, Khanji; Uqali, Muhammad Aslam

doi:10.18186/thermal.672085

Cited by 5 publications

(5 citation statements)

References 29 publications

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“…If the optimum insulation thicknesses found by calculations are used, there will be a significant decrease in the amount and cost of the energy to be consumed in cold storage to keep products unspoiled. The importance of insulation is understood yet again if we consider the environmental pollution to be caused by thermal power plants to generate the electric power to be used [27][28].…”

Section: Discussionmentioning

confidence: 99%

Optimum Insulation Thickness for Cold Storage Walls: Case Study for Turkey

Kürekci

2020

Journal of Thermal Engineering

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Cold storage have heat gain resulting from walls, roof, lighting, human, cooled products, and infiltration. The biggest of these gains is the heat gain through the walls. In this study, the optimum insulation thickness which should be used on the walls of cold storage was calculated. Calculations were made for 5 cities of Turkey (Izmir, Istanbul, Ankara, Sivas, and Erzurum) with different degree-day values. Extruded polystyrene (XPS), Expanded polystyrene (EPS), glass wool, rock wool, polyurethane were chosen as insulants to be used on the walls. Cooling degree-day values of the selected cities were calculated by using the average external temperature of the cities and the cold storage temperature (4, 0,-5,-10,-15,-20,-25 and-30°C). Calculations were repeated for different cold storage temperature values, and optimum insulation thicknesses that should be used for each temperature were found. In addition, energy savings and payback periods when optimum insulation thickness is used were also calculated.

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Section: Discussionmentioning

confidence: 99%

Optimum Insulation Thickness for Cold Storage Walls: Case Study for Turkey

Kürekci

2020

Journal of Thermal Engineering

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“…The LCC analysis estimates the optimum insulation thickness corresponding to maximum cost savings of the building envelope (Açıkkalp & Kandemir 2019;Axaopoulos et al 2019;Orzechowski & Orzechowski 2018), pipes (İlhan 2018;Martin-Du Pan et al 2019;Ucar 2018;187 Yin et al 2018), and ducts (Kumar et al 2019;Kumar et al 2018a;Kumar et al 2018b;Kumar et al 2018c;Soponpongpipat et al 2010;Yildiz & Ersöz 2016) considering the prevailing economic circumstances of a country (inflation and interest rate) on insulation investment and fuel billings (Huang et al 2019;Kumar et al 2019). In this analysis following assumption are made:…”

Section: Life Cycle Cost Analysismentioning

confidence: 99%

“…Where, the ratio of maintenance to initial cost (MR) and salvage value to initial cost (SV), which 248 are equal to zero because maintenance is not needed for the insulated duct and insulation is not 249 resalable at its end life as reported in (Kumar et al 2019;Kumar et al 2018a;Kumar et al 250 2018b;Kumar et al 2018c;Soponpongpipat et al 2010;Yildiz & Ersöz 2016). Therefore, P2=1.…”

Section: Heat Gain Through the Hvac Duct And Insulation Materials Economymentioning

confidence: 99%

“…Finally, the sensitivity analysis proved that the optimum insulation thickness is too sensitive to inflation and discount rate instead of other parameters. Kumar et al (2018a) had determined that the optimum insulation thickness for different duct sizes decreases with the increase in duct size. They found that the maximum energy savings of 84.91% for smaller duct sizes (30 cm) for natural and emission products were reduced by 81% compared to the bare duct.…”

Section: Introduction 26mentioning

confidence: 99%

“…Therefore, this study introduced an air gap to decrease the insulation quantity required to reduce energy loss. The optimum insulation thickness corresponding to maximum cost savings of the building envelope (Açıkkalp & Kandemir 2019;Axaopoulos et al 2019;Orzechowski & Orzechowski 2018), pipes (İlhan 2018;Martin-Du Pan et al 2019;Ucar 2018;Yin et al 2018), and 154 ducts (Kumar et al 2019;Kumar et al 2018a;Kumar et al 2018b;Kumar et al 2018c, 155 Soponpongpipat et al 2010Yildiz & Ersöz 2016) was investigated by using LCC analysis. The 156 present research also conducts the LCC analysis to determine the impact of an air gap on 157 In this research, the design and operating parameters were collected from the HVAC duct installed in a pharmaceutical company, Jamshoro, Pakistan, as given in Table 1…”

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confidence: 99%

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Lifecycle Cost Analysis of An Insulated Duct With An Air Gap

Kumar

Khan

Abro

2021

Preprint

Self Cite

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The insulation materials are used to reduce heat loss to/from the ducts with additional investment. This study aims to reduce this additional investment in the duct application by introducing an air gap between insulation and duct surface. It uses Life Cycle Cost (LCC) analysis to determine the economic benefits of the air gap considering four insulation materials for insulating the duct and natural gas as an energy source for chiller operation. The preliminary data regarding design and operating parameters were obtained from a renowned pharmaceutical company. The duct's annual energy loss was estimated for given operation hours in a year using the preliminary data and ambient conditions. The estimated energy loss through the duct is fed in LCC analysis to determine the impact of the air gap on optimum insulation thickness corresponding to the minimum LCC and payback period. The results show that the introduced air gap in an insulated duct lowers the optimum insulation thickness for the duct. As a result, the air gap maximizes the cost savings and minimizes the payback period. The expanded polystyrene is investigated as the most economical with maximum cost savings of USD 508.8-USD $766.8/m/year and a payback period of 1.15–1.17 years for the duct applications. Contrary, the air gap is determined the most effective in terms of cost and emission savings for the ducts insulated with rock wool. In conclusion, an air gap is an economical option for duct applications.

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Lifecycle cost analysis of an insulated duct with an air gap

Kumar

Khan

Abro

2021

Environ Sci Pollut Res

Self Cite

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The insulation materials are used to reduce heat loss to/from the ducts with additional investment. This study aims to reduce this additional investment in the duct application by introducing an air gap between insulation and duct surface. It uses Life Cycle Cost (LCC) analysis to determine the economic benefits of the air gap considering four insulation materials for insulating the duct and natural gas as an energy source for chiller operation. The preliminary data regarding design and operating parameters were obtained from a renowned pharmaceutical company. The duct's annual energy loss was estimated for given operation hours in a year using the preliminary data and ambient conditions. The estimated energy loss through the duct is fed in LCC analysis to determine the impact of the air gap on optimum insulation thickness corresponding to the minimum LCC and payback period. The results show that the introduced air gap in an insulated duct lowers the optimum insulation thickness for the duct. As a result, the air gap maximizes the cost savings and minimizes the payback period. The expanded polystyrene is investigated as the most economical with maximum cost savings of USD 508.8-USD $766.8/m/year and a payback period of 1.15-1.17 years for the duct applications. Contrary, the air gap is determined the most effective in terms of cost and emission savings for the ducts insulated with rock wool. In conclusion, an air gap is an economical option for duct applications.

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Economic and Environmental Impacts of Thermal Insulation Used in Different Duct Sizes

Cited by 5 publications

References 29 publications

Optimum Insulation Thickness for Cold Storage Walls: Case Study for Turkey

Optimum Insulation Thickness for Cold Storage Walls: Case Study for Turkey

Lifecycle Cost Analysis of An Insulated Duct With An Air Gap

Lifecycle cost analysis of an insulated duct with an air gap

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