42 research outputs found
An analytical method to evaluate facility management services for residential buildings
No full textBesides constructed quality and environmental quality, the quality of facilities in residential buildings is
influential to the living quality of numerous residents there. The functional quality of the facilities, in
turn, is dependent on the quality of their operation and management. A review of the relevant literature
and a focus group discussion with Facility Management (FM) practitioners, which were parts of the study
reported here, unveiled that prior performance evaluation studies focussed on assessing the outcome of
FM services whereas an analytical method suitable for holistic evaluation of the services is lacking. An
interview survey with 297 users of a typical residential estate in Hong Kong was carried out to solicit
their perceived levels of importance and performance of FM services. The responses were tested using
the Analytical Hierarchy Process (AHP) to isolate those with inconsistent judgments, followed by
computing the weightings for various aspects of FM services based on the consistent responses. The
calculation of a weighted performance score for benchmarking purposes and a critical evaluation of the
cost-effectiveness of FM services, which are crucial for achieving a quality and sustainable built environment,
are illustrated
Perception of importance and performance of the indoor environmental quality of high-rise residential buildings
No full text2008-2009 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptSelf-fundedPublishedGreen (AAM
Law and building services maintenance in Hong Kong
No full text202211 bcwhAccepted ManuscriptNot mentionPublishedGreen (AAM
Probabilistic risk assessment of the energy saving shortfall in energy performance contracting projects–a case study
No full textAuthor name used in this manuscript: P.T.I. LamAuthor name used in this manuscript: F.W.H. YikAuthor name used in this manuscript: E.H.W. Chan2013-2014 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishedGreen (AAM
From Primitive-Variable Boundary-Integral Formulation to FWH Equation
No full textBoundary integral formulations for aeroacoustics in primitive variables (velocity and pressure), forcompressible Euler and Navier-Stokes equations, were developed by the author and his collaborators.Such formulations appear much more complicated and cumbersome to use than the classical (scalar)aeroacoustic formulations, such as the FWH equation, the Kirchho formula, and the Howe expressionfor the vorticity-generated sound. This paper explores the connection between the above scalar formulationsand the proposed primitive-variable formulation, and recasts this into a more manageableform. For the sake of simplicity and clarity, the paper is limited to inviscid isentropic flows. The resultis that, through a series of mathematical manipulations, one obtains that the formulation properlyreduces to the existing ones. The resulting expressions for velocity and pressure are much simplerthan the preceding ones and are surprisingly close to existing ones, in aeroacoustics as well as aerodynamics.Specifically, for incompressible flows, the formulation yields an integral representation for thepressure and one for the velocity. The integral representation for the pressure coincides essentiallywith the Kirchhoff equation for the acoustic pressure, which in turn is equivalent to the FW-H equation.The relationship with the Howe expression for the vorticity-generated sound is also addressed.On the other hand, the resulting rotational-flow expression for the velocity is closely related to thatobtained from the Helmholtz decomposition, as well as that from a non-primitive variable formulationproposed by the author, as a rotational-flow extension of his integral formulation for potential flows.The extension to compressible inviscid isentropic flows is also presented, with some aspects limitedto bodies in uniform subsonic translation. The paper is of theoretical nature; no numerical results areincluded
Experience of using a chilled water circuit design to expedite in situ chiller performance measurement
No full text2009-2010 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptOthersThe Hong Kong Polytechnic University (Project No. GU-557)PublishedGreen (AAM
A probe into the facilities maintenance data of a hotel
No full text2010-2011 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptOthersThe Hong Kong Polytechnic University research grant (No. 87T7)PublishedGreen (AAM
An analytical method to evaluate facility management services for residential buildings
No full text2010-2011 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptOthersThe Hong Kong Polytechnic University research grant (No. G-YG54)PublishedGreen (AAM
Hotel engineering facilities : a case study of maintenance performance
No full text2010-2011 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptSelf-fundedPublishedGreen (AAM
Impacts of facility service procurement methods on perceived performance of hospital engineering services
No full textPurpose: The paper aims to describe a research study on the impacts of different facility service procurement methods on the perceived performance of hospital engineering services (HES). The procurement methods examined include in-house organization by hospital staff and through a service level agreement with a government agency, each with and without outsourcing from private sector services providers works for some trades of HES. Design/methodology/approach: Performance of HES was measured by end-users' perception obtained through a questionnaire survey. Statistical analysis of the perceived performance scores given in the 444 questionnaire returns was carried out to yield evidence in support of the hypotheses under test. Findings: The main hypothesis tested was that given the unified management and monitoring system used among the hospitals and the low tolerance for inadequate HES performance in healthcare settings, there should be minimal differences in the perceived performance of the HES despite the fact that facility services for the HES were procured through different methods, which was shown to be largely valid by the survey findings. The second hypothesis tested was that good or poor performance would be dominated by the nature of different trades of HES, which was also validated by the survey findings. Research limitations/implications: Due to the small number of users involved for some trades of HES, the uncertainties in some mean performance scores are relatively large. Practical implications: The findings allowed the hospital administration to focus on costs in measuring the cost effectiveness of HES provisions in its hospitals. Originality/value: A situation that involves co-existence of different procurement methods is hard to find, and thus the findings are valuable. The performance scores found in the study can be used for benchmarking performance of HES in future.Department of Building Services Engineerin
