Effect of gender difference on sleeping comfort and building energy utilization: Field study on test chamber with thermoelectric air-cooling system

Irshad, Kashif; Algarni, Salem; Jamil, Basharat; Ahmad, Mahyudin; Khan, Mohammad Arsalan

doi:10.1016/j.buildenv.2019.01.058

Cited by 24 publications

(18 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These are energy-efficient and eco-friendly and have the potential for large-scale use. However, research evaluating sleep quality in a test-space equipped with a TE-AD heating/cooling system for sleep conditions is still in the initial stages [29].…”

Section: Discussionmentioning

confidence: 99%

“…A subjective opinion of the thermal comfort was recorded from the occupants before the start of the experiment (Figure 1). The occupant characteristics had been validated in an earlier study [29]. The subject wore a sleeping dress comprising of thin trousers (0.20 clo), a short-sleeved round neck t-shirt (0.09 clo), and a thin blanket (0.32 clo) was supplied to the subjects to cover the body while sleeping.…”

Section: Description Of Occupantsmentioning

confidence: 99%

See 1 more Smart Citation

Microclimate Thermal Management Using Thermoelectric Air-Cooling Duct System Operated at Five Incremental Powers and its Effect on Sleep Adaptation of the Occupants

et al. 2019

Self Cite

View full text Add to dashboard Cite

In this study, the microclimate of the test room was regulated using thermoelectric air duct cooling system (TE-AD) operated at input powers-240 W, 360 W, 480 W, 600 W, 720 W, and 840 W, on subsequent nights. Fifteen (15) healthy male volunteers were recruited to sleep under these test conditions and their sleep quality was assessed by studying objective measures such as sleep onset latency (SOL), mean skin temperature and heart rate as well as subjective parameters like predicted mean vote (PMV) and predicted percentage of dissatisfied (PPD). There was a consistent improvement on all studied parameters when the power of the system was increased from 240 W to 720 W. The mean sleep onset latency time was reduced from (M = 40.7 +/− 0.98 min) to (M = 18.33 +/− 1.18 min) when the operating power was increased from 240 W to 720 W, denoting an improvement in sleep quality. However, increasing the power further to 840 W resulted in deteriorating cooling performance of the TE-AD system leading to an increase in temperature of the test room and reduction in sleep comfort. Analysis of subjective indices of thermal comfort viz. PMV and PPD revealed that subjects are highly sensitive towards variations in microclimate achieved by changing the operating power of the TE-AD. This device was also found to be environmentally sustainable, with estimated reduction in CO2 emission calculated to be around 38% as compared to the conventional air-conditioning.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Description Of Occupantsmentioning

confidence: 99%

Microclimate Thermal Management Using Thermoelectric Air-Cooling Duct System Operated at Five Incremental Powers and its Effect on Sleep Adaptation of the Occupants

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Male subjects showed an overall better sleep quality at a lower surrounding temperature than female subjects. 21 For Beshir and Ramsey, 22 women tended to feel more uncomfortable than men at both high-and low-temperature extremes (23.3°to 43.3°C of Wet Bulb Globe Temperature) while performing perceptual-motor tasks and reported higher levels of drowsiness and boredom than men at all temperatures. Men had higher fatigue than women at the upper temperature levels.…”

Section: Introductionmentioning

confidence: 94%

Effects of urban noise variability on cognitive abilities in indoor spaces: Gender differences

Masullo

Ruggiero

Fernandez

et al. 2021

Noise & Vibration Worldwide

View full text Add to dashboard Cite

Previous evidence has shown that exposure to urban noise negatively influences some cognitive abilities (i.e. verbal fluency and delayed recall of prose memory) of people in indoor spaces. However, long-standing literature in the cognitive domain has reported that men and women can show different performance on cognitive tasks. Here, we aimed to investigate if and how different patterns of perceived urban noises in indoor environments could affect male and female participants’ cognitive abilities. Ambisonic sound recordings representing scenarios with varying noise patterns (low, medium and high variability) were acquired with an open window at three dwellings in a southern Italian city. As a control condition, the recordings were caught inside a quiet room. While exposed to theses four auditory conditions, participants had to perform cognitive tasks assessing free verbal memory recall, auditory–verbal recognition and working memory. The results show that male and female participants have a different tolerance to noise patterns. Women overperform men on verbal tasks, while the contrary effect emerges with men outperforming women on visuospatial working memory tasks.

show abstract

“…The following are recommended as future directions of study based on the literature review and observations. These are applicable to both normal and elevated temperatures: As different nanomaterials act differently when mixed with conventional cement mortar, it is important to conduct a cost–benefit analysis and to identify the overall impacts on the environment, such as acid attacks and CO 2 emissions; Given the morphology studies on the use of different nanomaterials, there is a need to assess the mechanical and durability properties resulting from the combination of fibers with nanomaterials, such as carbon fibers, polypropylene fibers, and more; The application of nano-mortars to impact heat seepage in buildings [ 151 ] and for plastering purposes requires extensive study and comparisons with traditional options; The evaluation of thermal conductivity and dielectric constant parameters is of paramount importance; As different nanomaterials bring about varied physical and chemical changes when incorporated into cement mortars in terms of durability and strength properties, the combined effects of various types of nanomaterials need to be studied. …”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

“…The application of nano-mortars to impact heat seepage in buildings [ 151 ] and for plastering purposes requires extensive study and comparisons with traditional options;…”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

et al. 2021

Self Cite

View full text Add to dashboard Cite

Nanotechnology has emerged as a field with promising applications in building materials. Nanotechnology-based mortars are examples of such building materials that have widespread applications in the construction industry. The main nanomaterials used in mortars include nano-silica, nano-magnesium oxide, nano-alumina, nano-titanium oxide, nano-zinc oxide, nano-clay, and nano-carbon. This review paper presents a summary of the properties and effects of these nanomaterials on cement mortar in terms of its fresh-state and hard-state properties. The fresh-state properties include the setting time, consistency, and workability, while the hard-state properties include mechanical properties such as compressive, flexural, tensile strengths, as well as the elasticity modulus, in addition to durability properties such as water absorption, shrinkage strain, strength loss due to freeze–thaw cycles, and chloride penetration, among others. Different nanomaterials cause different physical and chemical alterations within the microstructures of cement mortar. Therefore, the microstructural characterization and densification of mortar are discussed in detail at varying temperatures. In general, the involvement of nanomaterials in cement mortar influences the fresh-state properties, enhances the mechanical properties, and impacts the durability properties, while reducing the porosity present in the mortar matrix. Cementitious nanomaterials can create a pathway for the easy injection of binding materials into the internal microstructures of a hydration gel to impact the hydration process at different rates, whereas their non-cementitious counterparts can act as fillers. Furthermore, the research gaps and future outlook regarding the application of nanomaterials in mortar are discussed.

show abstract

Effect of gender difference on sleeping comfort and building energy utilization: Field study on test chamber with thermoelectric air-cooling system

Cited by 24 publications

References 43 publications

Microclimate Thermal Management Using Thermoelectric Air-Cooling Duct System Operated at Five Incremental Powers and its Effect on Sleep Adaptation of the Occupants

Microclimate Thermal Management Using Thermoelectric Air-Cooling Duct System Operated at Five Incremental Powers and its Effect on Sleep Adaptation of the Occupants

Effects of urban noise variability on cognitive abilities in indoor spaces: Gender differences

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

Contact Info

Product

Resources

About