scholarly journals On reducing CO2 concentration in buildings by using plants

2021 ◽  
Vol 61 (5) ◽  
pp. 617-623
Author(s):  
Ondřej Franek ◽  
Čeněk Jarský
Keyword(s):  
Indoor Environment ◽  
Co2 Concentration ◽  
Operating Costs ◽  
Internal Environment ◽  
Environment Quality ◽  
Office Space ◽  
Indoor Environment Quality ◽  
Building Ventilation ◽  
Different Levels

The article deals with the implementation of plants in the indoor environment of buildings to reduce the concentration of CO2. Based on a specified model representing the internal environment of an office space, it was studied whether the requirement for the total amount of ventilated air could be reduced by using plants, thereby achieving savings of operating costs in the building ventilation sector. The present research describes the effect of plant implementation according to different levels of CO2 concentration of the supply air, specifically with values of 410 ppm corresponding to the year 2020, 550 ppm to the year 2050 and 670 ppm to the year 2100, as well as according to different levels of CO2 concentration in the indoor environment, namely 1000 ppm and 1500 ppm, the illumination of plants in the indoor environment is constant in the model, PPFD equals to 200 μmolm−2 s−1. Based on the computational model, it was found that the implemented plants can positively influence the requirement for the total amount of ventilated air, the most significant effect is in the case of a low indoor environment quality, with the CO2 concentration of 1500 ppm, and a high supply air quality 410 p˙pm. The simulation also showed that compared to 2020, by the year 2100, it will be necessary to increase the ventilation of the indoor environment by 25.1% to ensure the same quality of the indoorenvironment.

scholarly journals Experimental study on indoor environment quality in a naturally ventilated classroom of a university using natural ventilation and ventilation fan

2020 ◽  
Vol 165 ◽  
pp. 04082
Author(s):  
Jie Zong ◽  
Wenjun He ◽  
Lingna Wang ◽  
Hongkai Chai ◽  
Yingying Zhao ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Indoor Environment ◽  
Natural Ventilation ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Environment Quality ◽  
Air Supply ◽  
Indoor Environment Quality ◽  
Jinan City ◽  
Ventilation Fan

Strengthening indoor ventilation is an important measure to improve air quality. In transitional season between spring and summer, a university classroom in Jinan city was selected as the research object. Mechanical air supply is adopted to solve the problem of insufficient fresh air or excessive carbon dioxide concentration in the classroom. CO2 concentration and air change rates are compared in natural ventilation and mechanical classrooms. The experiment shows that the indoor CO2 concentration of mechanical ventilation classroom is relatively low. Under natural ventilation, mechanical ventilation and mixed ventilation, the average air change rates were 1.05 h-1, 1.83 h-1 and 2.7 h-1, respectively. According to the statistics analysis of the questionnaire, 72.84% of the students hope to install the mechanical ventilation in the classroom.

scholarly journals Occupants’ Satisfaction toward Indoor Environment Quality of Platinum Green-Certified Office Buildings in Tropical Climate

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2264
Author(s):  
Masoud Esfandiari ◽  
Suzaini Mohamed Zaid ◽  
Muhammad Azzam Ismail ◽  
Mohammad Reza Hafezi ◽  
Iman Asadi ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Indoor Environment ◽  
Tropical Climate ◽  
Full Scale ◽  
High Relative Humidity ◽  
Office Buildings ◽  
Environment Quality ◽  
Significant Difference ◽  
Indoor Environment Quality

The quality of the indoor environment has become a vital component for buildings due to the time spent indoors. To this extent, the performance of the indoor environment is considered as part of the greenery criteria by green rating schemes such as the Green Building Index in Malaysia. This study aims to investigate and assess the quality of the indoor environment of Platinum-certified office buildings in a tropical climate. This research applied a case study approach over two Platinum-certified office buildings. Post-occupancy evaluation is employed integrating full-scale measurement with an occupants’ survey. The measurement was carried out from May to August, and 112 questionnaires were retrieved to evaluate occupants’ satisfaction with aspects of the indoor environment. Thermal comfort, indoor air quality, acoustic, lighting, furniture, and cleanliness are considered as the main study variables. The findings of full-scale measurement indicated high relative humidity, and low air velocity and illuminance. While occupants reported overall indoor environment quality (IEQ) comfort, a significant correlation of variables was observed. The main sources of dissatisfaction were identified as overcooling around 24 °C, high relative humidity (RH), around 70% RH, glare, and background noise around 51.9 dB. Statistically, a significant difference between occupants’ responses to IEQ of two cases was identified, although both buildings are labelled with a Platinum certificate.

scholarly journals Analysis of Indoor Environment in Classroom Based on Hygienic Requirements

2016 ◽  
Vol 24 (2) ◽  
pp. 16-22
Author(s):  
Miroslav Javorček ◽  
Zuzana Sternová
Keyword(s):  
Mathematical Model ◽  
Elementary School ◽  
Air Temperature ◽  
Indoor Environment ◽  
Co2 Concentration ◽  
In Situ Measurements ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
The Difference

Abstract The article contains the analysis of experimental ventilation measurement in selected classrooms of the Elementary School Štrba. Mathematical model of selected classroom was prepared according to in-situ measurements and air exchange was calculated. Interior air temperature and quality influences the students ´ comfort. Evaluated data were compared to requirements of standard (STN EN 15251,2008) applicable to classroom indoor environment during lectures, highlighting the difference between required ambiance quality and actually measured values. CO2 concentration refers to one of the parameters indicating indoor environment quality.

Satisfaction of occupants toward indoor environment quality of certified green office buildings in Taiwan

2014 ◽  
Vol 72 ◽  
pp. 232-242 ◽  
Author(s):  
Han-Hsi Liang ◽  
Chen-Peng Chen ◽  
Ruey-Lung Hwang ◽  
Wen-Mei Shih ◽  
Shih-Chi Lo ◽  
...  
Keyword(s):  
Indoor Environment ◽  
Office Buildings ◽  
Environment Quality ◽  
Indoor Environment Quality
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