Soundproof Window - Natural Ventilation

2021 ◽  
Vol 263 (3) ◽  
pp. 3294-3304
Author(s):  
Vinícius Ávila Ferreira
Keyword(s):  
Noise Reduction ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Noise Pollution ◽  
Air Conditioning System ◽  
Domestic Environment ◽  
Frequent Use ◽  
Air Supply ◽  
Acoustic Comfort ◽  
Surrounding Areas

Expansion of brasilians cities worsen noise pollution in these places, forcing people to maintain their doors and windows closed. Domestic environment enclosing lead to necessity of air conditioning system, however the frequent use of the equipment may cause many health problems, such as respiratory difficulties and spread of diseases , not to mention high costs with energy. Considering these facts, there is the need of soundproofing windows with air supply , that allows passage of air without noise passage, guarantee a well-ventilated environment, with thermic and acoustic comfort without the use of acclimatisation systems . we have developed two prototypes with significant opening that allows air supply (passage) (0,35m2) and noise reduction (Rw+Ctr) reaching 8 to 10 dB. In the first study, we considered people inhabiting really noisy surrounding areas, who has already installed a regular window. In this particular case, we developed a soundproofing window air supply that can be installed over the existing one. A second study considered new constructions to focus the environment where the person sleeps and then elaborate a soundproofing window air supply for bedrooms.

Effect of Air Conditioning Position on Thermal Comfort in the Floor Air Conditioning System

2014 ◽  
Vol 493 ◽  
pp. 74-79
Author(s):  
Y.A. Sabtalistia ◽  
S.N.N. Ekasiwi ◽  
B. Iskandriawan
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Air Supply ◽  
Air Conditioning Systems ◽  
Air Diffusion

Energy consumption for air conditioning systems (air conditioning system) increased along with the increasing need for fresh air and comfortable in the room especially apartments. FAC system (Floor Air Conditioning) is growing because it is more energy efficient than CAC (Ceiling Air Conditioning) system. However, the position of the AC supply is on the lower level at the FAC system causes draft discomfort becomes greater as air supply closer to the occupants so that thermal comfort can be reduced. Heat mixture of windows, exterior walls, kitchen, and occupants in the studio apartment affect thermal comfort in the room too.This study aims to determine the position of the AC supply which has the best thermal comfort of FAC system in the studio apartment. It can be done by analyzing ADPI (Air Diffusion Performance Index), the distribution of air temperature, wind speed, RH (Relative Humidity), and DR (Draft Risk) to change the position of the AC supply supported by CFD (Computational Fluid Dynamics) simulation.This result prove that AC position 2 (on wall near the kitchen) is more comfortable than AC position 1 (on the bathroom wall) because AC position 2 away from occupied areas, thereby reducing the occurrence of draught discomfort.

Thermal Comfort Analysis of a Ship Air-Conditioning System Using Solidworks Flow Simulation

2013 ◽  
Vol 773 ◽  
pp. 883-888 ◽  
Author(s):  
Hamid Nawaz ◽  
Yan Sheng Yuan
Keyword(s):  
Thermal Comfort ◽  
Air Conditioning ◽  
Flow Simulation ◽  
Simulation Software ◽  
Air Conditioning System ◽  
Air Supply ◽  
Different Types ◽  
Design Software ◽  
Selection Of ◽  
Occupied Zone

The focus of this work is to simulate and optimize thermal comfort in a ship air-conditioning system by evaluating the performance of different types of air supply outlets. Thermal comfort analyses were performed in Solidworks Flow Simulation software by changing the number, type and position of air supply outlets and the comfort was optimized by evaluating the values of temperature, velocity, PMV (Predicted mean vote) & PPD (Predicted Percentage Dissatisfied). It was concluded from the results obtained from different analyses that air supply outlet is a vital part in any type of HVAC (Heating ventilation & air conditioning) system design, as its number, type and position has significant effect on the air distribution and thermal comfort in a subject space. It was also deduced that improper selection of air supply outlet can result in room air stagnation, unacceptable temperature gradients, and undesirable velocities in the occupied zone that may lead to occupant discomfort. Through this work the importance and effectiveness of CFD (computational fluid dynamics) design tools, in the design & optimization of HVAC systems has been evaluated and it was concluded that CFD design software like Solidworks flow simulation provide an excellent provision to validate different aspects of HVAC design before actual construction.

scholarly journals Impact of the Air-Conditioning System on the Power Consumption of an Electric Vehicle Powered by Lithium-Ion Battery

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Brahim Mebarki ◽  
Belkacem Draoui ◽  
Boumediène Allaou ◽  
Lakhdar Rahmani ◽  
Elhadj Benachour
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Air Conditioning ◽  
Storage Capacity ◽  
Lithium Ion ◽  
Noise Pollution ◽  
Air Conditioning System ◽  
Energy Storage Capacity ◽  
Basic Goal

The car occupies the daily universe of our society; however, noise pollution, global warming gas emissions, and increased fuel consumption are constantly increasing. The electric vehicle is one of the recommended solutions by the raison of its zero emission. Heating and air-conditioning (HVAC) system is a part of the power system of the vehicle when the purpose is to provide complete thermal comfort for its occupants, however it requires far more energy than any other car accessory. Electric vehicles have a low-energy storage capacity, and HVAC may consume a substantial amount of the total energy stored, considerably reducing the vehicle range, which is one of the most important parameters for EV acceptability. The basic goal of this paper is to simulate the air-conditioning system impact on the power energy source of an electric vehicle powered by a lithium-ion battery.

scholarly journals Evaluation of Thermal Behavior of the Skeleton in a Green Building with the Aid of TABS

2019 ◽  
Vol 111 ◽  
pp. 01085
Author(s):  
Hiroshi Muramatsu ◽  
Tatsuo Nobe
Keyword(s):  
Heat Flux ◽  
Thermal Behavior ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Concrete Slab ◽  
Ventilation System ◽  
Office Building ◽  
Air Conditioning System ◽  
Indoor Thermal Environment

In this study, an office building in Japan that incorporates energy-saving features and environmental technologies was investigated. This office building features a green façade, natural ventilation, a concrete slab with no suspended ceilings, and thermo-active building systems. Two airconditioning systems were installed in this building—a ceiling radiation air-conditioning system and a whole floor-blow off air conditioning system. In addition, a natural ventilation system was installed. We surveyed the heat flux of the ceiling surface and indoor thermal environment of this building from 2015 through 2016. The ceiling using the heat storage amount of concrete maintains a constant temperature in the workplace during as well as after office hours. We also performed detailed measurements of the heat flux of the ceiling surface and indoor thermal environment in the summer of 2017. The results showed that the ceiling radiation air-conditioning system provided a stable thermal environment. Furthermore, we report that making use of the thermal behavior of the skeleton improved the operation of the ceiling radiation airconditioning system.

scholarly journals Numerical Simulation and Analysis of Air Supply Mode in Luxury Cruise Air-conditioning System

2021 ◽  
Vol 2029 (1) ◽  
pp. 012119
Author(s):  
Shaoshu Zhang ◽  
Haibo Gao ◽  
Zhiguo Lin ◽  
Yunrui Zhao ◽  
Yunhua Guo ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Air Supply ◽  
Supply Mode

Analysis of Reconstruction in Terms of CO2 Concentration

2019 ◽  
Vol 808 ◽  
pp. 39-45
Author(s):  
Mária Budiaková
Keyword(s):  
Mechanical Ventilation ◽  
Air Quality ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Short Term ◽  
Air Conditioning System ◽  
The Poor ◽  
The University ◽  
Concentration Limits

The paper focuses on the analysis of reconstruction in terms of CO2 concentration. The reconstruction at the university included the exchange of windows. The original windows were exchanged for the modern wood tight windows. Providing CO2 concentration in the interiors of a university is immensely important for the students of the university. Not exceeding CO2 concentration limits is necessary not only for the physiological needs of students but also for the required performance of students. Teaching is conducted during the whole day in the researched university schoolroom. The short-term natural ventilation during the breaks is noticeably not sufficient. After 15 minutes from the beginning of the lesson, students started complaining about the air quality and they had to open the windows. To point out the unsustainable state of the poor air quality during the day-long teaching and to be able to prove the officials the importance of the continuation of the reconstruction by building mechanical ventilation or air conditioning system, there were carried out the experimental measurements in the schoolroom. The device Testo 480 was used for the measurements. Obtained values of CO2 concentration are presented in the charts. Interestingly, this reconstruction significantly decreased the air quality. The admissible values of CO2 concentration were exceeded after the first hours of teaching. These values were worsening with each additional hour of teaching. Therefore, another reconstruction is needed to enable the transition from natural ventilation to the mechanical ventilation system. In the conclusion of this paper, there are principles how to design new schoolrooms. Furthermore, there are presented recommendations how to operate the existing schoolrooms.

scholarly journals Study On Architectural Models Designed For Natural Ventilation By Finite Element Method

10.29007/sqq7 ◽  
2022 ◽  
Author(s):  
Tich Thien Truong ◽  
Quoc Thien Pham ◽  
Kim Bang Tran
Keyword(s):  
Air Conditioning ◽  
Natural Ventilation ◽  
Living Environment ◽  
Ansys Software ◽  
Air Conditioning System ◽  
Architectural Models ◽  
Volume Method ◽  
Natural Wind ◽  
Construction Works

With people's health status according to statistics getting worse and worse, improving the quality of health is an inevitable need that many researchers are interested in. In addition to improving through eating, improving the living environment in homes and workplaces is also essential. Nowadays, many countries around the world have implemented many house models that apply natural ventilation instead of artificial air conditioning system, because natural wind is better and also feels more comfortable. Therefore, the study of controlled natural wind-catching architecture is necessary and consistent. Research in this field can help improve the living environment for people. The objective of the paper is to simulate ventilation solutions based on experience in construction works by finite volume method through ANSYS software to consider and evaluate the feasibility of these solutions. If the simulation results match or approximate the actual verified results, they can be applied to the improvement of natural ventilation structures to create a better indoor living environment, meeting the requirements of the environment. more comfortable diagnostics.

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