The main reason for these functions like heating, ventilation, cooling, and air-conditioning is to make occupants of rooms comfortable (Awbi, 2003). VAV system is one of the HVAC applications and its main purpose is to reduce energy cost as well as maintenance cost. The use of VAV process contains two main components and the components are the room and the VAV damper. The main VAV air handling system is the embedded HVAC system which most of the times are invisible. It is this system that is responsible for delivery of conditioned air to the whole building or structure. The use of this type of system has two merits and the merits are based on the constant volume that is found within the system. This system has the fan control capacity unlike other systems like CAV and the fan control capacity enhances reduction of the used amount of energy. CHAPTER ONE 1.1 INTRODUCTION Variable Air Volume also commonly known as (VAV) system is a kind of ventilation, heating, and air-conditioning devices that use a supply duct of fresh air and gives out hot or cool air as the supply air. The air which is being supplied to this device most of the time has constant temperature and therefore, the resultant airflow always varies for the achievement of the fall and rise of the losses or gains characterized with thermal zone. Most of the VAV systems have two primary merits and the merits are due to the constant volume within the system. The system has a fan control capacity which is capable of reducing the amount of energy consumed through the fan. This energy which is used by the fans forms the total energy cooling requirements which are beneficial to the building (Etheridge & Sandberg, 1996). The Variable Air Volume system has a lot of dehumidification compared to the constant volume system because the constant volume system is capable of modulating the temperature of the discharge air. The attainment of the temperature for the discharged air constitutes the cooling load of the whole system. Within this system the blowing rate for the air is greatly varied and in the case of Variable Air Volume with a single handler for air, the serving for various multiple zones can be achieved. The flow rate associated with each multiple zone when only one handler is operational is always varied. The Variable Air system has a terminal unit and this terminal unit acts as a VAV box which controls the air flow rate for the different zones. This box operates automatically with the help of the actuator. There is a direct connection between the central or local control systems with the VAV box and the control system at times is pneumatically controlled. The use of Variable Air Volume (VAV) for many years has been able to provide quality indoor air thereby improving the quality of the surrounding environment. The quality of the surrounding air greatly affects the general environmental quality and therefore, the use of this system has been preferred in many buildings that belong to private individuals as well as companies. A lot of health benefits are attributed to indoor air quality since low quality air contains microbes that are capable of affecting the occupants of the buildings (Chadderton, 2004). A lot of prevalence has been given to the VAV system compared to CV system and this prevalence is
Variable Air Volume (VAV) System to achieve better Indoor Environmental Quality for a commercial Building & energy saving By (Insert Your Name) A dissertation submitted to the faculty of (_) In partial fulfillment for the requirements For the Degree of BEng (Hons) building services & Sustainable Engineering UNIVERSIT Table of Contents Abstract The use of VAV system has been in existence since the year 1980…
It is of utmost importance to state that the project has been initiated as a direct outcome of the special effort undertaken by the airliner company Air Astana. The Air Astana is one of the reputed and youngest flights operating and connecting various domestic and international destinations with regards to the location of Kazakhstan.
However, along with the growth have come increased complexities and managerial challenges as competition, terrorist threats, epidemics and financial slowdowns as well as rising fuel costs have continued to present a strong impact on the aviation sector. Thus, strategic and operational management in the air transport sector now presents complex challenges.
This research paper aims to draw attention to the gains from implementing Lean Manufacturing System and the Six Sigma Quality Management System, to gain an in depths understanding of benefits and limitations of both systems, to discuss and analyze the findings to present as a case to the board of directors.
In Hong Kong, many sustainable and renewable systems have been developed rapidly in the local market, such as the PV panel, rainwater recycling system, BIPV system, green roof, and so forth. This dissertation will investigate the feasibility of applying a green wall system in a Hong Kong situation.
To my friends and colleagues who has been continuously giving me encouragement and words of wisdom. Abstract Research Problem: The impact of increased investment on renewable energy resources on world market prices of oil and the economic growth of OECD remain unclear.
The Evolution 8 2.3. The Design Principles 10 2.4. Summary 14 3. Building Information Modeling 18 3.1. The Concept 18 3.2. Application of BIM in Design Stages 22 4. Sustainable Design by using BIM 26 4.1. Design Tools 26 4.2. Summary 28 5. Case Study 29 5.1.
I understand that I must prepare my project in English. I declare that all the work done in connection with my project will be my own. SIGNED __________________________________________ DATE ____________________ Suggestion for Potential Supervisor: If allocated, I agree to supervise this project SIGNED ________________________________________ DATE __________________ FOR UNIVERSITY USE ONLY Date Received: Further details required YES/NO .
The important operations being supported through the information technologies are the usage of software for the drafting requirements, building analysis and design, project scheduling and management activities, web-enabled services for business creation, supply chain management activities and also client management activities.
Survey questionnaires and interviews further supported the findings of the literature review. They indicated that while there was an environmental cost to airport activities, especially air freight ones, the economic benefits outweighed the environmental costs. This, in itself, determined the sustainability and continuation of airfreight activities.