scholarly journals Low Cost Green Retrofit for Office

2019 ◽  
Vol 8 (2) ◽  
pp. 3155-3161 ◽  
Keyword(s):  
Indoor Air ◽  
Air Conditioning ◽  
Low Cost ◽  
Ventilation System ◽  
Lighting System ◽  
Air Conditioning System ◽  
Potted Plants ◽  
Building Retrofit ◽  
Significant Attention

Building retrofit programme has received significant attention in recent years. This article aims to make a contribution towards low cost green retrofit for office application. The retrofit options suggested in this study includes ventilation system, efficient lighting system, potted plants for better indoor air quality and thermal insulation to walls and roof. The detailed analysis of proposed ventilation system is included in the present study. The comparison between proposed ventilation system with existing air conditioning system is also analyzed. The study demonstrates an efficient way towards achieving low cost green retrofit. The outcomes of this case study will increase the confidence among stakeholders in promoting energy conservation and sustainability.

ENERGY ANALYSIS FOR LIGHTING AND AIR-CONDITIONING SYSTEM OF AN ACADEMIC BUILDING

2015 ◽  
Vol 76 (5) ◽  
Author(s):  
Tee Boon Tuan ◽  
Ahmad Zubair Yahaya ◽  
Younus Fahad Breesam ◽  
Reduan Mat Dan ◽  
Muhammad Zulfattah Zakaria
Keyword(s):  
Air Conditioning ◽  
Energy Analysis ◽  
Building Energy ◽  
Consumption Pattern ◽  
Lighting System ◽  
Energy Audit ◽  
Energy Usage ◽  
Air Conditioning System ◽  
Academic Building

Energy analysis is important to analyze energy consumption pattern, monitoring on how the energy used varies with time in the building and how the system element interrelate. In this case study, a preliminary energy audit is done on lighting and air-conditioning system. The lighting and airconditioning system consume the highest amount from the total building energy usage. The study was conducted in the Faculty of Mechanical Engineering Building, Universiti Teknikal Malaysia (UTeM) Technology Campus. From the result shows  that the air-conditioning system has contributed approximately 48.8% from the total monthly energy usage. The estimation of Building Energy Index (BEI) for the cooling load is 655.19 kWh/m²/year. Meanwhile, the BEI for lighting system is found approximately 150 kWh/m2/year. 

DESIGN OF THE AIR CONDITIONING SYSTEM OF THE ROOM FOR MUSHROOM GROWING

2020 ◽  
Author(s):  
U.I. Babenkov ◽  
◽  
V.V. Romanov ◽  
G.A. Galka ◽  
E.S. Zhelonkina
Keyword(s):  
Technological Process ◽  
Heat Sink ◽  
Air Conditioning ◽  
Ventilation System ◽  
Calculated Data ◽  
Lighting System ◽  
Air Conditioning System ◽  
Refrigeration Equipment ◽  
Heat Influx ◽  
Oyster Mushrooms

Based on the analysis of the technological process and the requirements for the growth of oyster mushrooms, the article examined: the main errors in the design of the mushroom farm, calculated the heat influx and heat sink of the production room, selected an air conditioning scheme for summer and winter modes, developed cabinets for placing mushroom blocks, designed and the lighting system was designed, the design and calculation of the ventilation system was performed. Based on the calculated data, the main additional refrigeration equipment, air conditioning system was selected, equipment for the lighting system was selected. The aim of this work is to design an air conditioning system for a room with a year-round cycle of growth of oyster mushrooms.

Research on Characteristics of Microbe Spatiotemporal Distribution in Indoor Air

2014 ◽  
Vol 955-959 ◽  
pp. 253-256
Author(s):  
Zhe Hua Du ◽  
Xin Lin
Keyword(s):  
Indoor Air ◽  
Air Conditioning ◽  
Indoor Environment ◽  
Ventilation System ◽  
Weather Condition ◽  
Spatiotemporal Distribution ◽  
Dust Particles ◽  
Airborne Microorganisms ◽  
Air Conditioning System ◽  
Environment Condition

The review focuses on the progresses of air microbes in indoor environment, including their sources, sorts, influence of human body health, spread regulation and spatiotemporal distribution characteristics. Most airborne microorganisms attached to the dust particles, which is present in the air in the form of aerosol .The distribution of microbe is related with indoor environment condition in the air. The factor which influences it to distribute mainly includes temperature, degree of humidity, wind velocity and weather condition etc. Air microbe is bred easily in ventilation and air conditioning system. The growth of microbe has a tremendous relation with the ventilation and air condition. The distribution of microorganisms in different regions, different buildings and different ventilation system is different from each other.

A Study on the Performance of Stratified Air Conditioning Design in Assembly Halls – A Case Study at the Dazhi Cultural Center in Taiwan

2013 ◽  
Vol 368-370 ◽  
pp. 599-602 ◽  
Author(s):  
Ian Hung ◽  
Hsien Te Lin ◽  
Yu Chung Wang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Indoor Air ◽  
Air Conditioning ◽  
Cfd Simulation ◽  
Indoor Temperature ◽  
Cultural Center ◽  
Computational Fluid Dynamics Cfd

This study focuses on the performance of air conditioning design at the Dazhi Cultural Center and uses a computational fluid dynamics (CFD) simulation to discuss the differences in wind velocity and ambient indoor temperature between all-zone air conditioning design and stratified air conditioning design. The results have strong implications for air conditioning design and can improve the indoor air quality of assembly halls.

scholarly journals Transient Effects of Different Ventilation Methods on Car Indoor Air Quality

2015 ◽  
Vol 2 (1) ◽  
pp. 70 ◽  
Author(s):  
Feng-Chyi Duh
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Conditioning ◽  
Heat Index ◽  
Transient Effects ◽  
Air Conditioning System ◽  
Carbon Dioxide Concentrations ◽  
Volatile Organic

This study investigated transient effects on the air quality of parked cars and moving cars with and without operating air conditioning. Carbon dioxide, carbon monoxide, volatile organic compounds, and formaldehyde concentrations were measured for comparative analysis. The results showed that simply changing the air conditioning system from internal circulation to external circulation to introduce air from outside reduces carbon dioxide concentrations by more than 50%, volatile organic compound concentrations by more than 77%, and the heat index from 0.1℃/min to less than 0.05 ℃/min. In order to conserve energy and improve car indoor air quality, this study can serve as a reference on healthy car environments.

Simulation of COVID-19 indoor emissions from coughing and breathing with air conditioning and mask protection effects

2021 ◽  
pp. 1420326X2110395 ◽  
Author(s):  
Carlo Cravero ◽  
Davide Marsano
Keyword(s):  
Air Conditioning ◽  
Vaccination Campaign ◽  
Ventilation System ◽  
Management Strategies ◽  
Air Conditioning System ◽  
Beneficial Effects ◽  
Mass Vaccination Campaign ◽  
Future Events ◽  
System Configurations ◽  
Different Characteristics

The COVID-19 infection has emerged as a disruptive pandemic at worldwide level. The study of the mechanism of contagion is one of the greatest challenges before a mass vaccination campaign that would protect populations. The study can support the development of knowledge and tools to develop possible strategies for containing its spread in future events. The saliva droplet aerosol expelled during breathing or coughing is the main cause for the propagation of the SARS-Cov-2. In this work, a URANS CFD approach was used to simulate the dispersion from the mouth of these particles in closed environments. The air conditioning system was considered. The conditions were varied to determine their impact on the diffusion of the aerosol. Lagrangian and Eulerian numerical approaches were used to model the coughing and the breathing events. These were validated with the puff theory, numerical and experimental results. A realistic case of a meeting room with two persons was simulated. Different characteristics of the expulsed aerosols and different ventilation system configurations were considered to demonstrate how these simulations can support management strategies for indoor occupation. Finally, the effect of the protective mask was introduced to quantify its beneficial effects to support safe indoor occupation.

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