Estimation of optimum requirements for indoor air quality and energy consumption in some residences in Kuwait

Elkilani, Amal; Bouhamra, Walid

doi:10.1016/s0160-4120(01)00096-4

Cited by 23 publications

(21 citation statements)

References 7 publications

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“…The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Standard 62-2001 indicated that the lowest indoor ACH for housing is 0.35 hr À1 . Elkilani and Bouhamra (2001) demonstrated that ACH rates were at 0.25-0.7 hr À1 when the HVAC system is employed, and at >1.0-1.7 hr À1 in natural ventilation conditions in general buildings. Thus, two total ACH parameters, 0.5 and 1.0 hr À1 , were set in the experiments to simulate the indoor air ventilating condition.…”

Section: Description Of Environment-controlled Test Chamber Experimentsmentioning

confidence: 95%

Inactivation efficiency to Bacillus subtilis and Escherichia coli bacterial aerosols of spraying neutral electrolyzed water

Chuang

Yang

Chang

et al. 2013

Journal of the Air & Waste Management Association

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The main objective of this study is to apply neutral electrolyzed water (NEW) spraying to inactivate bioaerosols. We evaluated the inactivation efficiency of NEW applied to inactivate two airborne bacterial Escherichia coli and Bacillus subtilis aerosols inside an environmental-controlled chamber in the study. Generated with electrolyzing 6.15 M sodium chloride brine, the NEW with free available chlorine (FAC) concentration 50, 100, and 200 ppm was pumped with an air pressure of 70 kg/cm 2 through nozzle into the chamber to inactive E. coli and B. subtilis aerosols precontaminated air (initial counts of 3 Â 10 4 colony-forming units [CFU]/m 3 ). Bacterial aerosols were collected and cultured from chamber before and after NEW spray. The air exchange rate (ACH, hr À1 ) of the chamber was set to simulate fresh air ventilating dilution of indoor environment. First-order concentration decaying coefficients (Ka, min À1 ) of both bacterial aerosols were measured as an index of NEW inactivation efficiency. The result shows that higher FAC concentration of NEW spray caused better inactivation efficiency. The Ka values under ACH 1.0 hr À1 were 0.537 and 0.598 for E. coli of FAC 50 and 100 ppm spraying, respectively. The Ka values of FAC 100 ppm and 200 ppm spraying for B. subtilis were 0.063 and 0.085 under ACH 1.0 hr À1 , respectively. The results indicated that NEW spray is likely to be effective in inactivation of bacterial airborne contamination. Moreover, it is observed in the study that the increase of ventilation rate and the use of a larger orifice-size nozzle may facilitate the inactivation efficiency.Implications: Bacterial aerosols have been implicated in deterioration of air quality and occupational health. Effective, safe, and economic control technology is highly demanded, especially for agricultural and food industries. In the study, NEW mist spraying performed effectively in controlling E. coli and B. subtilis modeling bioaerosols contamination. The NEW revealed its potential as an alternative airborne disinfectant worth being discovered for improving the environmental quality in the future.

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Section: Description Of Environment-controlled Test Chamber Experimentsmentioning

confidence: 95%

Inactivation efficiency to Bacillus subtilis and Escherichia coli bacterial aerosols of spraying neutral electrolyzed water

Chuang

Yang

Chang

et al. 2013

Journal of the Air & Waste Management Association

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“…The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (AHSRAE) Standard 62-2001 [13] indicates that the lowest indoor ACH for housing is 0.35 (h À1 ). Elkilani and Bouhamra [14] demonstrated that ACH rates were 0.25-0.7 (h…”

Section: Methodsmentioning

confidence: 99%

Improved Removal of Indoor Volatile Organic Compounds by Activated Carbon Fiber Filters Calcined with Copper Oxide Catalyst

Huang

Luo

Yang

et al. 2010

CLEAN Soil Air Water

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Heating, ventilating, and air-conditioning (HVAC) systems ensure indoor air quality and provide a comfortable environment. However, the conventional HVAC systems only provide indoor ventilation and adjust temperature and humidity. This work removes indoor volatile organic compounds (VOCs) using a feasible and novel air-cleaning for an HVAC system, to remove indoor VOCs. An activated carbon-fiber (ACF) filter calcined with copper oxide (CuO) catalyst, called a CuO/ACF catalyst filter, was the developed kit. Formaldehyde, a major VOC, was chosen as the target pollutant. Experiments were performed to confirm the filtration ability of the CuO/ACF catalyst filter in removing formaldehyde in a stainless-steel chamber equipped with a simplified HVAC system. Total air exchange rate (ACH) was controlled at 0.5 and 1.0 h À1 , the fresh ACH was 0.15 and 0.30 h À1 , and relative humidity (RH) was set at 30 and 70%. A first-order decay of formaldehyde existed in the controlled chamber when the two pretreated CuO/ACF catalyst filters were employed. Experimental results demonstrate that the CuO/ACF catalyst filters removed formaldehyde effectively. The decay constant was 0.425 and 0.618 h À1 for 0.5 and 2.0 ppm formaldehyde, respectively. Moreover, the formaldehyde decay rate increased as total ACH, fresh ACH, RH, and the Cu(NO 3 ) 2 concentration for calcination of CuO/ACF catalyst filter increased.

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“…However, they did not consider the effect of fresh air on other air pollutants such as VOC and sVOC [104]. More studies are needed to address the dilemma between building energy consumption and IAQ.…”

Section: Influence Of Building Envelope and Iaq On Space Heating/coolingmentioning

confidence: 99%

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

Cao

Dai

Liu

2016

Energy and Buildings

1,089

387

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Estimation of optimum requirements for indoor air quality and energy consumption in some residences in Kuwait

Cited by 23 publications

References 7 publications

Inactivation efficiency to Bacillus subtilis and Escherichia coli bacterial aerosols of spraying neutral electrolyzed water

Inactivation efficiency to Bacillus subtilis and Escherichia coli bacterial aerosols of spraying neutral electrolyzed water

Improved Removal of Indoor Volatile Organic Compounds by Activated Carbon Fiber Filters Calcined with Copper Oxide Catalyst

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

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