LCC Optimization of Different Insulation Materials and Energy Sources Used in HVAC Duct Applications

Kumar, Dileep; Ali, Intizar; Hakeem, Muhammad; Junejo, Awais; Harijan, Khanji

doi:10.1007/s13369-018-3689-x

Cited by 9 publications

(9 citation statements)

References 42 publications

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“…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 ducts (Kumar et al 2019;Kumar et al 2018a;Kumar et al 2018b;Kumar et al 2018c, Soponpongpipat et al 2010Yildiz & Ersöz 2016) was investigated by using LCC analysis. The present research also conducts the LCC analysis to determine the impact of an air gap on (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).…”

Section: Description Of Heating Ventilation and Airmentioning

confidence: 99%

Lifecycle cost analysis of an insulated duct with an air gap

Kumar

Khan

Abro

2021

Environ Sci Pollut Res

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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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Section: Description Of Heating Ventilation and Airmentioning

confidence: 99%

Lifecycle cost analysis of an insulated duct with an air gap

Kumar

Khan

Abro

2021

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…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%

“…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…”

mentioning

confidence: 99%

“…The weathering parameters were obtained from the Metrological Department of Pakistan, as given in Table2. Natural gas properties were found in(Kumar et al 2019), and its cost was obtained from the Oil and Gas Regulatory Authority of Pakistan. The insulation cost is based on the Project entitled "Heating, Ventilation and Air Conditioning Works of New Calcium Site and Red Area" of Novartis Pharma, Jamshoro, Pakistan.…”

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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

View full text Add to dashboard Cite

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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A Novel Concrete Mix Design Methodology

Kumar¹,

Alam²,

Sanjayan³

2023

Lecture Notes in Civil Engineering

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Concrete mix design is the methodology for mixing binder, aggregate and water to achieve required physical, mechanical, and thermal properties. In particular, the physical properties depend on the volume fraction of each element in the concrete recipe. In this study we considered cement mortar, complying with ASTM C105, as the reference concrete with cement as the binder and silica sand as the aggregate. The reference mortar was denser with high thermal conductivity and compressive strength at given rheological properties. A denser concrete presents difficulty in material handling and imposes a safety risk, and high thermal conductivity increases building energy consumption. Therefore, lightweight concrete (LWC) has been developed by replacing silica sand with porous materials. LWC includes cement as the binder, with silica sand and other porous materials as the primary and binary fillers. The mass of the filler materials is determined by their particle density and volume fraction. LWC has low thermal mass, thereby exacerbating the summertime overheating and peak cooling demand of buildings. Therefore, there is a need to design a LWC with high thermal mass by incorporating phase change materials (PCM), which are mainly incorporated as tertiary filler. Here, we propose a novel concrete mix design methodology to incorporate PCM composite as a partial replacement of the porous material without changing binding materials.

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LCC Optimization of Different Insulation Materials and Energy Sources Used in HVAC Duct Applications

Cited by 9 publications

References 42 publications

Lifecycle cost analysis of an insulated duct with an air gap

Lifecycle cost analysis of an insulated duct with an air gap

Lifecycle Cost Analysis of An Insulated Duct With An Air Gap

A Novel Concrete Mix Design Methodology

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