Coupled Simulation of a Room Air-conditioner with CFD Models for Indoor Environment

STUDY OF INDOOR ENVIRONMENT AND ENERGY PERFORMANCE OF TYPICAL SLEEPING ROOM USING AIR CONDITIONER

JP Journal of Heat and Mass Transfer ◽

10.17654/hm023010153 ◽

2021 ◽

Vol 23 (1) ◽

pp. 153-162

Author(s):

Thi Thu Hang Tran ◽

Ngoc Nguyen Tran ◽

Viet Dung Nguyen

Keyword(s):

Indoor Environment ◽

Energy Performance ◽

Air Conditioner

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The effect of physical activity and indoor environment on preschool children’s health

10.30574/msarr.2021.1.2.0011 ◽

2021 ◽

Vol 1 (2) ◽

pp. 045-055

Author(s):

Maria Saridi ◽

Aikaterini Toska ◽

Dimitra Latsou ◽

Sofia Karakousi ◽

Eleni Albani ◽

...

Keyword(s):

Physical Activity ◽

Family Environment ◽

Indoor Environment ◽

Indoor Air Pollution ◽

Preschool Age ◽

Children's Health ◽

Children’S Health ◽

Vulnerable Groups ◽

Air Conditioner ◽

The Impact

Aim: The aim of the study was to investigate the effect of physical activity and indoor environment on preschool children’s health. Subject and Methods: The final sample comprised 126 parents of children of preschool age. An anonymous questionnaire was used in order to investigate the impact of indoor air pollution on the children's health. Data analysis was performed by using descriptive statistics and cross-tabulations with the SPSS 22.0. Results: The majority of the parents were female (87.3%) at an average age of 31-40 years (73%). Regarding the children, there were an almost equal number of boys and girls and their age ranged between 3 and 6 years old. The children had not shown any signs of emotional or behavioural problems or other issues regarding regular physical functions and they hadn’t shown any problems regarding recreational activities and interaction with friends (90.5%). Cough is a frequent symptom in the case of a common cold (85.7%). There were no statistically significant differences in the parents' responses as far as their children's health dimensions, concerning the availability of an air conditioner at home, the existence of pets and smoking habits in the family environment. Conclusions: Improving air quality is an extremely complicated issue, since pollutants may be created both indoors and outdoors, which makes it very difficult to decrease them. Yet it still is definitely necessary, given the negative effects of pollution on human health, especially on the more vulnerable groups, such as children.

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Analysis of Indoor Environment Safety with R32 Leaking from a Running Air Conditioner

Procedia Engineering ◽

10.1016/j.proeng.2015.09.190 ◽

2015 ◽

Vol 121 ◽

pp. 1605-1612 ◽

Cited By ~ 6

Author(s):

Lizhi Jia ◽

Wufeng Jin ◽

Yan Zhang

Keyword(s):

Indoor Environment ◽

Air Conditioner

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Coupled Simulation between CFD and Multizone Models Based on Modelica Buildings Library to Study Indoor Environment Control

Proceedings of the 12th International Modelica Conference, Prague, Czech Republic, May 15-17, 2017 ◽

10.3384/ecp1713255 ◽

2017 ◽

Author(s):

Wei Tian ◽

Wangda Zuo ◽

Thomas Sevilla ◽

Michael Sohn

Keyword(s):

Indoor Environment ◽

Coupled Simulation ◽

Environment Control

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Implementation of a coupled simulation framework with neural network and Modelica for fast building energy simulation considering non-uniform indoor environment

Building and Environment ◽

10.1016/j.buildenv.2021.108740 ◽

2021 ◽

pp. 108740

Author(s):

Qi Zhou ◽

Ryozo Ooka

Keyword(s):

Neural Network ◽

Indoor Environment ◽

Building Energy ◽

Energy Simulation ◽

Building Energy Simulation ◽

Simulation Framework ◽

Coupled Simulation

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Designing Functional Products in the Best Interest of the User — With a Factor 10 Reduction in Life Cycle Cost : Example, a (Solar) Airconditioning System

Engineering Technology Management: Engineering Business Management, Safety Engineering and Risk Analysis, Technology and Society ◽

10.1115/imece2006-15088 ◽

2006 ◽

Author(s):

John Dartnall ◽

Arjun K. Adhikari ◽

John McNab

Keyword(s):

Life Cycle ◽

Life Cycle Cost ◽

Product Life Cycle ◽

Indoor Environment ◽

Peak Load ◽

Air Conditioner ◽

Best Interest ◽

Air Conditioners ◽

Life Cycle Design ◽

Maintenance Requirements

There is increasing interest in Life Cycle Design with the purpose of raising sustainability and reducing energy and material consumption. By increasing energy efficiency, selecting more suitable materials and lessening maintenance requirements it is practical to reduce life cycle cost. Conventional Heat pump air conditioners operate to effect a healthy and comfortable indoor environment. They are large consumers of energy, partly due to the need to exhaust air (with consequent energy wastage) from the conditioned building so that healthy ventilation air may be introduced in its place. Rather than drawing all the energy from community electricity and gas supplies, the designer should design these systems so they recover as much energy as is feasible from both building exhaust air and the environment. A low life cycle cost solar air conditioner design is described that obtains under peak load more than 90% of its energy from a combination of building exhaust air and insolation with a reduction in life cycle cost approaching a factor of 10. In basic terms, with a reduction of a factor of 3 in energy consumption along with a life increase also of a factor of 3 it is possible to approach a factor of 10 improvement in product life cycle cost.

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The Effect of Raised Benches Containing Crops on the Indoor Environment in Greenhouses

Volume 8B: Heat Transfer and Thermal Engineering ◽

10.1115/imece2015-51706 ◽

2015 ◽

Author(s):

Sunita Kruger ◽

Leon Pretorius

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Velocity Distribution ◽

Crop Production ◽

Indoor Environment ◽

Three Dimensional ◽

Cfd Models ◽

Computational Fluid Dynamics Cfd ◽

Plant Level

The purpose of this paper is to investigate the influence of peninsular arranged perforated benches containing plants on the indoor environment of a naturally ventilated greenhouse. The results are compared to a greenhouse containing peninsular arranged solid benches with no plants. The investigation will be conducted numerically using three-dimensional Computational Fluid Dynamics (CFD) models. The overall temperature and velocity distribution were investigated at different sections of the greenhouse. The temperature and velocity distributions at plant level were of particular interest. Results indicated that the greenhouse containing the perforated benches were in general cooler, but also exhibited higher velocities throughout. The velocities observed were higher than those recommended by ASHRAE [1]. It was concluded that care should be taken when placing plants on the perforated benches especially in the regions adjacent to the walls, as this can lead to non-uniform crop production.

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