HVAC air-quality model and its use to test a PM2.5 control strategy

Marsik, Tom; Johnson, Roberta

doi:10.1016/j.buildenv.2007.11.001

Cited by 22 publications

(8 citation statements)

References 10 publications

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“…Compared to the manual system of which the ventilation inverter frequency is in the Inflow reduction ¼ PM 10 amount manual system À PM 10 amount proposed system PM 10 amount manual system ! 100% (13) range of 40e60 Hz, the proposed controllers regulate the ventilation inverter frequency within 20e60 Hz depending on the outdoor air quality, waiting room PM 10 concentration, and subway frequency. On average the inverter frequency of the proposed IAQ ventilation controllers is slower than that of the manual ventilation system.…”

Section: Iaq Ventilation Control Under the Moderate Outdoor Pm 10 Conmentioning

confidence: 99%

“…These researchers have assumed that the polluted indoor air is replaced with clean outdoor air by increasing the ventilation rate. In fact, if the outdoor air is strongly contaminated due to aeolian transportation of dust particles or yellow dust, its entry into the building spaces through the ventilation systems increases the air pollutants inside the building spaces [13,14]. This article proposes a new approach that considers the outdoor air quality used for diluting indoor air pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Indoor air quality control for improving passenger health in subway platforms using an outdoor air quality dependent ventilation system

Kim

Braatz

Kim

2015

Building and Environment

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Section: Iaq Ventilation Control Under the Moderate Outdoor Pm 10 Conmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Indoor air quality control for improving passenger health in subway platforms using an outdoor air quality dependent ventilation system

Kim

Braatz

Kim

2015

Building and Environment

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“…As for the PM 10 and PM 2.5 concentrations in the outdoor air, the official hourly measurement data [20] provided by the local government was applied in this simulation (Figure 7). It was also assumed that each occupant in the office generated 0.0052 L/s of CO 2 [15], while no generation sources of airborne particles was available in the model office space for simplicity [21]. local government was applied in this simulation (Figure 7).…”

mentioning

confidence: 99%

“…local government was applied in this simulation (Figure 7). It was also assumed that each occupant in the office generated 0.0052 L/s of CO2 [15], while no generation sources of airborne particles was available in the model office space for simplicity [21].…”

mentioning

confidence: 99%

Indoor Air Quality Enhancement Performance of Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems

2019

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The main objective of this study is to investigate the indoor air quality enhancement performance of two different liquid desiccant and evaporative cooling-assisted air conditioning systems, such as the variable air volume (VAV) system with the desiccant-enhanced evaporative (DEVap) cooler, and the liquid desiccant system with an indirect and direct evaporative cooling-assisted 100% outdoor air system (LD-IDECOAS), compared with the conventional VAV system. The transient simulations of concentration variations of carbon dioxide (CO2), coarse particles, and fine particles (PM10 and PM2.5) in a model office space served by each system were performed using validated system models that were found in the literature. Based on the hourly thermal loads of the model space predicted by the TRNSYS 18 program, each air conditioning system was operated virtually using a commercial equation solver program (EES). The results indicated that the LD-IDECOAS provided the lowest annual indoor CO2 concentration among all the systems considered in this research, while the VAV system with DEVap cooler exceeded the threshold concentration (i.e., 1000 ppm) during the cooling season (i.e., July, August, and September). For the indoor particulate contaminant concentrations, both liquid desiccant and evaporative cooling-assisted air conditioning systems indicated lower indoor PM2.5 and PM10 concentrations compared with the reference system. The LD-IDECOAS and the VAV with a DEVap cooler demonstrated 33.3% and 23.5% lower annual accumulated indoor PM10 concentrations than the reference system, respectively. Similarly, the annual accumulated indoor PM2.5 concentration was reduced by 16% using the LD-IDECOAS and 17.1% using the VAV with DEVap cooler.

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“…In recent years, many research conclude that indoor environmental pollution caused by particle have unknown damage in residential buildings [1][2][3] , public welfare buildings, commercial buildings with central air-conditioning system. The tiny particle not only supply the condition for air pollution growing ,but also carry lots of Bacteria and moulds due to its strong surface activity, so the IAQ condition have an important effect on human health.…”

Section: Introductionmentioning

confidence: 99%

Research on Particle Penetrate through Single Crack Based on CFD

Xie¹,

Yuan²,

He³

2016

Proceedings of the 2016 International Conference on Applied Mathematics, Simulation and Modelling

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Abstract-Particle pollutant is the prime pollutant of most cities in china, the tiny particle accumulated lots of harmful substance, and it is the carrier of bacteria, revealing the Mechanism of particle transport has an important meaning on controlling the indoor particle pollutant and disease prevention. This article sets up the model of particle penetrating the building envelope based on mathematics modeling, this model takes the pressure difference between indoor and outdoor( air change rate in rooms), crack depth, crack height and particle size as the input parameters and using the CFD to do the simulation analysis , drawing a conclusion.

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HVAC air-quality model and its use to test a PM2.5 control strategy

Cited by 22 publications

References 10 publications

Indoor air quality control for improving passenger health in subway platforms using an outdoor air quality dependent ventilation system

Indoor air quality control for improving passenger health in subway platforms using an outdoor air quality dependent ventilation system

Indoor Air Quality Enhancement Performance of Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems

Research on Particle Penetrate through Single Crack Based on CFD

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