scholarly journals ARCHITECTURAL MEASURES FOR FACILITATION OF INDOOR AIR QUALITY IN BUILDINGS

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Sasa Cvoro
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
Indoor Air ◽  
Physical Environment ◽  
Architectural Design ◽  
Total Energy Consumption ◽  
Indoor Space ◽  
Adequate Quality ◽  
Measurable Factors

This Paper focuses on the importance measures for facilitation of air comfort in construction and the possibility of its application in architectural design. Facilitation of adequate comfort in physical environment directly affects health and working abilities of people and significantly increases energy consumption. Between 30% and 40% of the total energy consumption is spent in the process of using the construction fund in order to ensure adequate quality of air, i.e. air comfort of the indoor space. In this Paper special attention is devoted to the analysis of measurable factors of impact on air comfort through objective parameters of air quality and humidity.

scholarly journals Improving Indoor Air Quality by Using Sheep Wool Thermal Insulation

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2443
Author(s):  
Andreea Hegyi ◽  
Cezar Bulacu ◽  
Henriette Szilagyi ◽  
Adrian-Victor Lăzărescu ◽  
Vasile Meiţă ◽  
...  
Keyword(s):  
Air Quality ◽  
Thermal Insulation ◽  
Indoor Air ◽  
Living Space ◽  
Coefficient Of Thermal Conductivity ◽  
Adequate Quality ◽  
Risk Of Disease ◽  
Efficiency Indicators ◽  
Sheep Wool

Currently, the need to ensure adequate quality of air inside the living space but also the thermal efficiency of buildings is pressing. This paper presents the capacity of sheep wool heat-insulating mattresses to simultaneously provide these needs, cumulatively analyzing efficiency indicators for thermal insulation and indicators of improving air quality. Thus, the values obtained for the coefficient of thermal conductivity, and its resistance to heat transfer, demonstrate the suitability of their use for thermal insulation. The results of the permeability to water vapor characteristics on the sorption/desorption of water, air, demonstrate the ability to control the humidity of the indoor air and the results on the reduction of the concentration of formaldehyde, demonstrating their contribution to the growth of the quality of the air, and to reduce the risk of disease in the population.

scholarly journals Bake-Out Strategy Considering Energy Consumption for Improvement of Indoor Air Quality in Floor Heating Environments

2018 ◽  
Vol 15 (12) ◽  
pp. 2720 ◽  
Author(s):  
Seonghyun Park ◽  
Janghoo Seo
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Building Materials ◽  
Significant Loss ◽  
Computational Fluid Dynamics Analysis ◽  
Heating Energy Consumption ◽  
Floor Heating

Improved quality of life has led to a growing demand for better indoor air quality (IAQ). Buildings are becoming more airtight and insulated in order to minimize energy consumption. The importance of both energy conservation and IAQ improvement has been recognized and addressed by many studies. Bake-out is the process of using indoor heating to remove volatile compounds present in building materials and furnishings so that they can be vented out into the atmosphere. Indiscriminate use of heating to increase the surface temperature of materials during this process can result in significant loss of energy. Therefore, energy-efficient bake-out should be performed by considering both the floor temperature and the emission amount of pollutants. This study aims to investigate an effective and economical bake-out implementation strategy via experimentation and computational fluid dynamics analysis. The results showed weak direct correlation between the heating energy consumption and the amount of pollutants emitted. The study also highlights the passive option of installing sorptive building materials for improving IAQ economically.

The effect of vent inlet aspect ratio and its location on ventilation efficiency

2019 ◽  
Vol 29 (2) ◽  
pp. 180-195 ◽  
Author(s):  
Tingsen Chen ◽  
Zhuangbo Feng ◽  
Shi-Jie Cao
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
Aspect Ratio ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Ventilation System ◽  
Design Standards ◽  
Total Energy Consumption ◽  
Aspect Ratios ◽  
Ventilation Efficiency

The total energy consumption of buildings in China has been increasing year by year, ventilation energy consumption accounts for more than 20% of the total building energy consumption. The optimisation of ventilation system design aiming at energy conservation is of great significance while keeping healthy indoor air quality. However, the current codes and standards are still lacking specification requirements for vents design, e.g. inlet size ratio or position, which can greatly impact on indoor airflow and ventilation efficiency. In this work, we investigated the aspect ratios of vent inlets and their locations on indoor air quality. Both experimental and numerical simulation methods were adopted. Ventilation efficiency is represented with the local average peak concentration 〈C ̅*〉A,max. Results showed that when vent inlet is in symmetric conditions (i.e. located in the middle of the sidewall) and the aspect ratio between the length and width of the vent inlet equals to 4, ventilation removal efficiency showed the best performance. These findings are of great importance to the engineering applicability and able to provide reference for future design standards.

Studies on an Integrated Energy-Saving System Combining Architectural Energy-Saving Features and Renewable Energy in Taiwan

2011 ◽  
Vol 250-253 ◽  
pp. 3271-3274 ◽  
Author(s):  
Wen Pei Sung ◽  
W. S. Ou ◽  
J. M Chang ◽  
Y.D. Kuan
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Air Quality ◽  
Energy Saving ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Proton Exchange ◽  
Hydrogen Energy ◽  
Total Energy Consumption ◽  
Indoor Plants

Saving energy along with reducing carbon emission is an unavoidable new trend in response to continual global warming. In Taiwan, the energy consumed by commercial buildings and residential houses accounts for about 18% of the total energy consumption with 31% consumed for HVAC (heating, ventilation, and air conditioning) to emit 21 millions of carbon dioxide annually. Hence, in this research, an integrated energy-saving system combining green architecture, recirculation and reuse of water resources, indoor plants to purify indoor air quality, and solar energy and hydrogen energy is proposed for providing HVAC and illumination. The research has accomplished the following: (1) roof-top plants will lower the indoor temperature during summer; (2) utilizing aquatic plants to purify the wastewater for recirculation and reuse will effectively remove BOD and COD from contaminated water; (3) indoor plants are effective in lowering loadings to air conditioners and energy consumption; (4) the solar air conditioner has excellent overall energy saving features; (5) the solar hydrogen generating system and reformed methanol system have been developed applied to develop a 100 W PEMFC (proton exchange membrane fuel cell); and (6) a portable plant cultivation system has been developed to enhance plant growth for removing indoor carbon dioxide so that the building needs not be ventilated much to maintain adequate indoor air quality.

scholarly journals Definition of Optimal Ventilation Rates for Balancing Comfort and Energy Use in Indoor Spaces Using CO2 Concentration Data

Buildings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 135 ◽  
Author(s):  
Alessandro Franco ◽  
Eva Schito
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Co2 Concentration ◽  
Air Cooling ◽  
Total Energy Consumption ◽  
Concentration Data ◽  
Definition Of ◽  
Ventilation Rates

Air ventilation rate plays a relevant role in maintaining adequate indoor air quality (IAQ) conditions in public buildings. In general, high ventilation rates ensure good indoor air quality but entail relevant energy consumption. Considering the necessity of balancing IAQ and energy consumption, a correlation between the number of occupants obtained from analysis of CO2 concentration variation is presented as a general element for controlling the operation of heating ventilation and air cooling (HVAC) systems. The specific CO2 exhalation rate is estimated using experimental data in some real conditions in university classrooms. A method for the definition of optimal values of air exchange rate is defined, highlighting that the obtained values are much lower than those defined in current technical standards with possibilities of relevant reduction of the total energy consumption.

scholarly journals Volatile Organic Compounds (VOCs) Emitted from Coated Furniture Units

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 806
Author(s):  
Ozge Cemiloglu Ulker ◽  
Onur Ulker ◽  
Salim Hiziroglu
Keyword(s):  
Air Quality ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Indoor Air ◽  
Exposure Period ◽  
Point Of View ◽  
Health Concerns ◽  
Volatile Organic ◽  
Significant Health

Volatile organic compounds (VOCs) are the main source influencing the overall air quality of an environment. It is a well-known fact that coated furniture units, in the form of paints and varnishes, emit VOCs, reducing the air quality and resulting in significant health problems. Exposure time to such compounds is also an important parameter regarding their possible health effects. Such issues also have a greater influence when the exposure period is extended. The main objective of this study was to review some of the important factors for the emission of VOCs from coated furniture, from the perspective of material characteristics, as well as health concerns. Some methods for controlling VOC emissions to improve indoor air quality, from the point of view recent regulations and suggestions, are also presented in this work.

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