Multi-stage heat-pipe heat exchanger for improving energy efficiency of the HVAC system in a hospital operating room
1

Sukarno, R; Putra, N; Hakim, II; Rachman, FF; Mahlia, TMI

Multi-stage heat-pipe heat exchanger for improving energy efficiency of the HVAC system in a hospital operating room 1

Sukarno, R Putra, N Hakim, II Rachman, FF Mahlia, TMI

Permalink

Publisher:: Oxford University Press (OUP)
Publication Type:: Journal Article
Citation:: International Journal of Low-Carbon Technologies, 2020, pp. ctaa048
Issue Date:: 2020-07-22

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download full textAdobe PDF (1.29 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Sukarno, R
dc.contributor.author	Putra, N
dc.contributor.author	Hakim, II
dc.contributor.author	Rachman, FF
dc.contributor.author	Mahlia, TMI
dc.date.accessioned	2020-08-06T13:37:35Z
dc.date.available	2020-08-06T13:37:35Z
dc.date.issued	2020-07-22
dc.identifier.citation	International Journal of Low-Carbon Technologies, 2020, pp. ctaa048
dc.identifier.issn	1748-1317
dc.identifier.issn	1748-1325
dc.identifier.uri	http://hdl.handle.net/10453/141999
dc.description.abstract	<jats:title>Abstract</jats:title> <jats:p>The demands of specific requirements related to thermal comforts, such as temperature, relative humidity, inside air exchange and other factors required in a hospital operating rooms, have necessitated the development of energy-efficient heating, ventilation and air conditioning (HVAC) systems and efficient heat-recovery system using a heat-pipe heat exchanger (HPHE). The experiment was conducted by using HPHEs having three, six and nine rows, with four heat pipes in each row, arranged in a staggered configuration with a variation of fresh-air inlet temperature and velocity. The theoretical analysis was conducted using the ε-NTU method for predicting the effectiveness, outlet temperature of the evaporator side and energy recovery of the HPHE. The experimental results indicated that increasing the air-inlet temperature in the evaporator section and the number of rows increased the HPHE effectiveness but increasing the air-inlet velocity reduced the effectiveness. The highest effectiveness of 62.6% was obtained at an air-inlet temperature of 45°C with an air-inlet velocity of 2 m/s and a 9-row HPHE. The energy recovery of the HPHE increased with the number of rows, air-inlet temperature and air velocity in the evaporator section. The ε-NTU method can be used as a comparison method in the analysis of heat-recovery systems that apply HPHE air conditioning systems. Heat pipes that utilize cold-air exhaust from a room in an HVAC system can enhance efficiency and reduce emissions.</jats:p>
dc.language	en
dc.publisher	Oxford University Press (OUP)
dc.relation.ispartof	International Journal of Low-Carbon Technologies
dc.relation.isbasedon	10.1093/ijlct/ctaa048
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Multi-stage heat-pipe heat exchanger for improving energy efficiency of the HVAC system in a hospital operating room 1
dc.type	Journal Article
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Information, Systems and Modelling
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
dc.date.updated	2020-08-06T13:37:28Z
pubs.publication-status	Published online

Abstract:

Abstract The demands of specific requirements related to thermal comforts, such as temperature, relative humidity, inside air exchange and other factors required in a hospital operating rooms, have necessitated the development of energy-efficient heating, ventilation and air conditioning (HVAC) systems and efficient heat-recovery system using a heat-pipe heat exchanger (HPHE). The experiment was conducted by using HPHEs having three, six and nine rows, with four heat pipes in each row, arranged in a staggered configuration with a variation of fresh-air inlet temperature and velocity. The theoretical analysis was conducted using the ε-NTU method for predicting the effectiveness, outlet temperature of the evaporator side and energy recovery of the HPHE. The experimental results indicated that increasing the air-inlet temperature in the evaporator section and the number of rows increased the HPHE effectiveness but increasing the air-inlet velocity reduced the effectiveness. The highest effectiveness of 62.6% was obtained at an air-inlet temperature of 45°C with an air-inlet velocity of 2 m/s and a 9-row HPHE. The energy recovery of the HPHE increased with the number of rows, air-inlet temperature and air velocity in the evaporator section. The ε-NTU method can be used as a comparison method in the analysis of heat-recovery systems that apply HPHE air conditioning systems. Heat pipes that utilize cold-air exhaust from a room in an HVAC system can enhance efficiency and reduce emissions.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/141999