The Impact of Workers Productivity Under Simulated Environmental Factor by Taguchi Analysis

Ismail, Ahmad Rasdan; Nizam, Che Mohammad; Haniff, M. H M; Deros, Baba Md

doi:10.1016/j.apcbee.2014.10.050

Cited by 13 publications

(6 citation statements)

References 2 publications

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“…High relative indoor humidity can limit the cooling system's performance, as was shown in our previous study [15]. High relative indoor humidity has also been found to be detrimental to thermal comfort and productivity [16]. While the active cooling technologies that currently dominate the market are well established and have comparatively lower upfront costs, they may come with long-term negative impacts on energy demand and greenhouse gas emissions [6].…”

Section: Introductionmentioning

confidence: 72%

“…The ventilation demand for both modelled systems is calculated to be 0.6 l/(sm 2 floor area ) (0.53 ACH), according to category II of the EN 15251 standard for very low-polluting office buildings [35]. The modelled AHU operation schedule follows the occupancy of the building, starting one hour before the first occupant arrives (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18). The studied dehumidification system is a condensing dehumidifier.…”

Section: Details Of the Studied Hvac Systemmentioning

confidence: 99%

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Performance Analysis of a Geothermal Radiant Cooling System Supported by Dehumidification

et al. 2022

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Space cooling demand is increasing globally due to climate change. Cooling has also been linked to all 17 sustainable development goals of the United Nations. Adequate cooling improves productivity and thermal comfort and can also prevent health risks. Meanwhile, policy initiatives such as the European Union’s Green Deal require participants to cut greenhouse gas emissions and reduce energy use. Therefore, novel cooling systems that are capable of efficiently producing high levels of thermal comfort are needed. Radiant cooling systems provide a design capable of fulfilling these goals, but their application in hot and humid climates is limited due to the risk of condensation. In this study, we compare the performances of radiant cooling systems with and without dehumidification. The studied systems are supplied by geothermal energy. The study is conducted using building energy models of a small office building belonging to a three-building school complex located in Sant Cugat near Barcelona in Spain. The studied location has a Mediterranean climate. The simulations are conducted using IDA Indoor Climate and Energy 4.8 simulation software. The results show that the radiant cooling system with dehumidification (RCD) produces considerably improved thermal comfort conditions, with maximum predicted mean vote (PMV) reached during the cooling season being 0.4 (neutral) and the maximum PMV reached by the radiant cooling system without dehumidification (RC) being 1.2 (slightly warm). However, the improved thermal comfort comes at the cost of reduced energy and exergy efficiency. The RCD system uses 2.2 times as much energy and 5.3 times as much exergy as the RC system. A sensitivity analysis is also conducted to assess the influence of selected input parameters on the simulation output. The results suggest that maximising dehumidification temperature and minimising ventilation flow rate can improve the energy and exergy efficiency of the RCD system while having a minor effect on thermal comfort.

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Section: Introductionmentioning

confidence: 72%

Section: Details Of the Studied Hvac Systemmentioning

confidence: 99%

Performance Analysis of a Geothermal Radiant Cooling System Supported by Dehumidification

et al. 2022

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“…Furthermore, the impact of climate or weather also significantly impacts construction project materials or labor resources. Ismail et al [63] and Zhang et al [64] concluded that it can be empirically proven that environmental factors such as temperature and relative humidity have a significant impact on workers' performance, whereas Amadi [65] claimed that the meteorological profile of wet-humid climates induces a significantly high percentage of the variance in the real-time demand for bagged cement on construction sites, which reveals that the issue should also be evaluated from a different perspective in terms of activity-specific material demand and supply. This should be one of the results of the duration and cost variability of construction activities during different periods.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Climate Change on Construction Activity Performance

Oruc,

Dikbas,

Gumus

et al. 2024

Buildings

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There are specific construction operations that require weather forecast data to make short-term decisions regarding construction; however, most resource-related decision making and all project management plans must be carried out to anticipate weather conditions beyond the capabilities of the currently available forecasting technologies. In this study, a series of single- and multi-risk analyses were performed with ~9 km grid resolution over Türkiye using combinations of weather and climate variables and their threshold values which have an impact on the execution and performance of construction activities. These analyses will improve the predictability of potential delays, enable the project to be scheduled on a future-proof basis by considering the calculated normal and periodic predictions on the grid scale, and serve as a dispute resolution tool for related claims. A comprehensive case study showcasing the methodology and illustrating its application shows that the project duration is expected to be extended because of the impact of climate on both historical and future periods. While the original project duration was 207 days, when climate effects were considered, the optimum mean and median values increased to 255 and 238 days, respectively, for the historical period. The optimum duration mean and median change to 239 days by the end of the century, according to the SSP5-8.5 scenario, if the construction schedules consider climate change. The change in duration was mainly due to rising temperatures, which increased winter workability and reduced summer workability. However, if the historical practices are carried over to future schedules, the mean and median increase to 258 days and 244 days, respectively, which may cause unavoidable direct, indirect, or overhead costs.

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“…n) is the j index value of the i order parameter. The efficiency coefficient U ij of each system to the whole can be expressed as formula (1).…”

Section: ) Construction Of Efficacy Functionmentioning

confidence: 99%

“…Ismail studied the effects of various factors on the work efficiency of operators by simulating different light, temperature and humidity conditions in a laboratory. Temperature was found to be the main factor affecting the work efficiency, followed by light and relative humidity [1]. Mook et al studied the relationship between the working efficiency and environmental parameters.…”

Section: Introductionmentioning

confidence: 99%

System Dynamics Analysis of Man-Machine Efficacy in Plateau Mines

Guo

et al. 2021

IEEE Access

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The effects of multiple factors in plateau environments on the working efficiency of equipment operation by personnel makes man-machine efficacy relatively difficult to evaluate. In this study, system dynamics are combined with coupling theory to establish a system dynamics simulation system to quantify the impact of personnel, equipment, and the environment on man-machine efficacy for a plateau environment and analyze the corresponding influencing factors. First, the factors that affect man-machine efficacy and the direct coupling between these factors are identified. Next, expert scoring is used to calculate the coupling between factors to construct a system dynamics model. Finally, the interaction between the influencing factors is used to develop a system dynamics simulation model for the man-machine environment. The results show that man-machine environment influence factors have the most noticeable effect on the man-machine function. The different factors have the same overall effect on the man-machine efficiency, where the impact value slowly increases over the first 0 to 6 hours of working time and then increases significantly. This result shows that the influencing factors have little effect on the man-machine efficiency before 6 hours of working time. The influence of the factors gradually becomes evident after 6 hours of operation time. Therefore, different labor hours are recommended for plateau mining enterprises in practice than for plain areas, where working times should be decreased to under 6 hours.INDEX TERMS Man-machine efficacy, system dynamics, plateau mines, coupling analysis, man-machine environment system.

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The Impact of Workers Productivity Under Simulated Environmental Factor by Taguchi Analysis

Cited by 13 publications

References 2 publications

Performance Analysis of a Geothermal Radiant Cooling System Supported by Dehumidification

Performance Analysis of a Geothermal Radiant Cooling System Supported by Dehumidification

The Impact of Climate Change on Construction Activity Performance

System Dynamics Analysis of Man-Machine Efficacy in Plateau Mines

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