Indoor Air Quality Enhancement Performance of Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems
| Autor: | Jae-Weon Jeong, Beom-Jun Kim, Junseok Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
020209 energy
lcsh:TJ807-830 Geography Planning and Development lcsh:Renewable energy sources 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law TRNSYS 01 natural sciences carbon dioxide concentration chemistry.chemical_compound Indoor air quality Thermal 0202 electrical engineering electronic engineering information engineering particulate contaminants lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 desiccant-enhanced evaporative air cooling Renewable Energy Sustainability and the Environment business.industry lcsh:Environmental effects of industries and plants liquid desiccant dehumidification Environmental engineering Variable air volume Particulates lcsh:TD194-195 chemistry Air conditioning Carbon dioxide Environmental science business Evaporative cooler indoor air quality |
| Zdroj: | Sustainability Volume 11 Issue 4 Sustainability, Vol 11, Iss 4, p 1036 (2019) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su11041036 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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