Evaluation Of Decentralised Fans Effectiveness In Office Building Ventilation System

Sem, Epoi Laeng (2017) Evaluation Of Decentralised Fans Effectiveness In Office Building Ventilation System. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The HVAC system have a significant influence on the energy consumption of a buildings.Reducing the energy demand used by the building is everyone concern nowadays. Therefore,development of a mechanical ventilation system with a low energy demand are required.In the conventional ducting system, there is a positive static pressure compared with the pressure inside the building.Using damper in the ventilation system had cause reversed air flow and pressure drop in the ducting system.Therefore, the fan need more power for fan to provide enough air flow to be supply into the room to achieve desired thermal comfort.This clearly energy usage is high by the system.The purpose of this study is to determine the energy saving potential in the HVAC system by experiment evaluation to the ventilation system.This study evaluates the decentralised fan effectiveness to the office building ventilation system.This project is done by developing a ducting trainer kit to study the face velocity and temperature distribution.The decentralised fan and damper are used to compare how they affect the air velocity and duration for temperature distribution in a room.In this project,the system with decentralised fan have good temperature distribution and high air velocity in the room compare to the system with damper.The highest temperature drop in the experiment result is when the system is with decentralised fan at main fan maximum speed,that is 26.5 C° while the face velocity in the room had increased more than 25 % in the four room.Using decentralised fan,the cooling is rapid and the energy efficiency is higher compared with the system that using damper.In the experiment finding,the energy consumption can be reduced more than 10 %.

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