Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate

T.m. Indra Mahlia, B. N. Taufiq, K. P. Ong, R. Saidur

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Turning off the electric lamp during available daylight will save electricity, while at the same time thermal energy from solar radiation transmitted through the window will increase the space-cooling load. Therefore, it is necessary to evaluate the whole system that includes not only the room space with the windows and the electric lighting systems, but also the air conditioning system. For analysis of the whole system using different types of energy (i.e. electricity, solar radiation, light emitted by lamps and thermal energy), it is important to take into account the quality of these different types of energy. The concept of entropy and exergy were applied in this analysis. The purpose of this study is to show the energy use for daylighting, electric lighting, and space cooling systems as a series of exergy input, output, and consumption and reveal how a daylighting system consumes solar exergy and how electric lighting and space cooling systems consume exergy from fossil fuel. The methodology to calculate the exergy consumption of the system during a given time was developed first. This method was then applied to the lighting and cooling for a typical room. The study found that electric lighting consumes the lowest amount of exergy while the space cooling consumes the highest amount of exergy for the system.

Original languageEnglish
Pages (from-to)1676-1684
Number of pages9
JournalEnergy and Buildings
Volume43
Issue number7
DOIs
Publication statusPublished - 01 Jul 2011

Fingerprint

Electric lighting
Exergy
Cooling systems
Lighting
Daylighting
Cooling
Solar radiation
Thermal energy
Electric lamps
Electricity
Solar system
Fossil fuels
Air conditioning
Entropy

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

@article{8be9ae7467b7423e8118408209c2825f,
title = "Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate",
abstract = "Turning off the electric lamp during available daylight will save electricity, while at the same time thermal energy from solar radiation transmitted through the window will increase the space-cooling load. Therefore, it is necessary to evaluate the whole system that includes not only the room space with the windows and the electric lighting systems, but also the air conditioning system. For analysis of the whole system using different types of energy (i.e. electricity, solar radiation, light emitted by lamps and thermal energy), it is important to take into account the quality of these different types of energy. The concept of entropy and exergy were applied in this analysis. The purpose of this study is to show the energy use for daylighting, electric lighting, and space cooling systems as a series of exergy input, output, and consumption and reveal how a daylighting system consumes solar exergy and how electric lighting and space cooling systems consume exergy from fossil fuel. The methodology to calculate the exergy consumption of the system during a given time was developed first. This method was then applied to the lighting and cooling for a typical room. The study found that electric lighting consumes the lowest amount of exergy while the space cooling consumes the highest amount of exergy for the system.",
author = "Mahlia, {T.m. Indra} and Taufiq, {B. N.} and Ong, {K. P.} and R. Saidur",
year = "2011",
month = "7",
day = "1",
doi = "10.1016/j.enbuild.2011.03.011",
language = "English",
volume = "43",
pages = "1676--1684",
journal = "Energy and Buildings",
issn = "0378-7788",
publisher = "Elsevier BV",
number = "7",

}

Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate. / Mahlia, T.m. Indra; Taufiq, B. N.; Ong, K. P.; Saidur, R.

In: Energy and Buildings, Vol. 43, No. 7, 01.07.2011, p. 1676-1684.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate

AU - Mahlia, T.m. Indra

AU - Taufiq, B. N.

AU - Ong, K. P.

AU - Saidur, R.

PY - 2011/7/1

Y1 - 2011/7/1

N2 - Turning off the electric lamp during available daylight will save electricity, while at the same time thermal energy from solar radiation transmitted through the window will increase the space-cooling load. Therefore, it is necessary to evaluate the whole system that includes not only the room space with the windows and the electric lighting systems, but also the air conditioning system. For analysis of the whole system using different types of energy (i.e. electricity, solar radiation, light emitted by lamps and thermal energy), it is important to take into account the quality of these different types of energy. The concept of entropy and exergy were applied in this analysis. The purpose of this study is to show the energy use for daylighting, electric lighting, and space cooling systems as a series of exergy input, output, and consumption and reveal how a daylighting system consumes solar exergy and how electric lighting and space cooling systems consume exergy from fossil fuel. The methodology to calculate the exergy consumption of the system during a given time was developed first. This method was then applied to the lighting and cooling for a typical room. The study found that electric lighting consumes the lowest amount of exergy while the space cooling consumes the highest amount of exergy for the system.

AB - Turning off the electric lamp during available daylight will save electricity, while at the same time thermal energy from solar radiation transmitted through the window will increase the space-cooling load. Therefore, it is necessary to evaluate the whole system that includes not only the room space with the windows and the electric lighting systems, but also the air conditioning system. For analysis of the whole system using different types of energy (i.e. electricity, solar radiation, light emitted by lamps and thermal energy), it is important to take into account the quality of these different types of energy. The concept of entropy and exergy were applied in this analysis. The purpose of this study is to show the energy use for daylighting, electric lighting, and space cooling systems as a series of exergy input, output, and consumption and reveal how a daylighting system consumes solar exergy and how electric lighting and space cooling systems consume exergy from fossil fuel. The methodology to calculate the exergy consumption of the system during a given time was developed first. This method was then applied to the lighting and cooling for a typical room. The study found that electric lighting consumes the lowest amount of exergy while the space cooling consumes the highest amount of exergy for the system.

UR - http://www.scopus.com/inward/record.url?scp=79956370081&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79956370081&partnerID=8YFLogxK

U2 - 10.1016/j.enbuild.2011.03.011

DO - 10.1016/j.enbuild.2011.03.011

M3 - Article

VL - 43

SP - 1676

EP - 1684

JO - Energy and Buildings

JF - Energy and Buildings

SN - 0378-7788

IS - 7

ER -