Search Results - "Lai, Alvin C.K."

Review of analytical models for heat transfer by vertical ground heat exchangers (GHEs): A perspective of time and space scales by Li, Min, Lai, Alvin C.K.

“…[Display omitted] •We provide a review and introduction to analytic models for ground heat exchangers.•We evaluate various models in a time and space scale…”
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New temperature response functions (G functions) for pile and borehole ground heat exchangers based on composite-medium line-source theory by Li, Min, Lai, Alvin C.K.

“…This paper presents a new approach to modeling of heat transfer by ground heat exchangers, involving unsteady heat conduction in composite media together with…”
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Analytical model for short-time responses of ground heat exchangers with U-shaped tubes: Model development and validation by Li, Min, Lai, Alvin C.K.

“…► A composite-medium line-source model for GHEs of a single U-shaped tube is created. ► The new line-source model is validated by a reported laboratory…”
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Heat-source solutions to heat conduction in anisotropic media with application to pile and borehole ground heat exchangers by Li, Min, Lai, Alvin C.K.

“…► We derived solutions to heat conduction in anisotropic solids with heat sources. ► Anisotropy affects long-term behavior of ground heat exchanger (GHE)…”
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Numerical and experimental study on airborne disinfection by negative ions in air duct flow by Zhou, Pei, Yang, Yi, Huang, Gongsheng, Lai, Alvin C.K.

“…In this paper, we develop a mathematical model that aims (1) to predict the distribution of negative ions generated by an air ionizer installed in a…”
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Experimental study of the effect of shoes on particle resuspension from indoor flooring materials by Lai, Alvin C.K., Tian, Yilin, Tsoi, Judy Y.L., Ferro, Andrea R.

“…Walking-induced resuspension is known to be a source of indoor particulate matter. The goal of this study is to investigate the effects of shoe type and shoe…”
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Parameter estimation of in-situ thermal response tests for borehole ground heat exchangers by Li, Min, Lai, Alvin C.K.

“…This paper discusses some aspects of parameters estimation used in in-situ thermal response tests of ground heat exchangers, including sensitivity analysis and…”
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Inactivation of airborne bacteria by cold plasma in air duct flow by Zhou, Pei, Yang, Yi, Lai, Alvin C.K., Huang, Gongsheng

“…This paper developed a numerical model for predicting bacteria inactivation by cold plasma tube. The bulk air velocity, ion mobility, electric field and ion…”
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Numerical study of cooking particle coagulation by using an Eulerian model by Lai, Alvin C.K., Chen, Jia

“…Airborne particles emitted in cooking process adversely affect human health and indoor air quality. In this work, we developed an Eulerian turbulence CFD model…”
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Study on photocatalytic performance of cerium-graphene oxide-titanium dioxide composite film for formaldehyde removal by Li, Jia, Zhang, Quan, Lai, Alvin C. K., Zeng, Liping

“…In order to degrade in‐car formaldehyde gas, graphene oxide (GO), cerium (Ce), and TiO2 were organically combined by one‐step sol–gel method. Then the mixed…”
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Study on the disinfection efficiency of multiple upper-room ultraviolet germicidal fixtures system on airborne microorganisms by Yang, Yi, Lai, Alvin C.K., Wu, Chunliang

“…Disinfection efficiency of upper-room ultraviolet germicidal (UR-UVGI) fixtures system is of key importance to control and reduce indoor airborne inflections…”
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Effects of room furnishings and air speed on particle deposition rates indoors by Thatcher, Tracy L., Lai, Alvin C.K., Moreno-Jackson, Rosa, Sextro, Richard G., Nazaroff, William W.

“…Particle deposition to surfaces plays an important role in determining exposures to indoor particles. However, the effects of furnishings and air speed on…”
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Penetration of fine particles through rough cracks by Lai, Alvin C.K., Fung, Joanna L.S., Li, M., Leung, K.Y.

“…Many building materials have random roughness protrusion scales of up to hundreds of micrometers. A scaled down experimental facility was designed to…”
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Progress in Integrative Biomaterial Systems to Approach Three-Dimensional Cell Mechanotransduction by Zhang, Ying, Liao, Kin, Li, Chuan, Lai, Alvin C K, Foo, Ji-Jinn, Chan, Vincent

“…Mechanotransduction between cells and the extracellular matrix regulates major cellular functions in physiological and pathological situations. The effect of…”
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Investigation of Electrostatic Forces on Particle Deposition in a Test Chamber by Lai, Alvin C.K.

“…Particle deposition under the influence of an electrostatic force is very common but is usually ignored as a factor in many indoor environments and controlled…”
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Experimental study on enhancing single-pass air disinfection efficacy for portable disinfection systems with different Far-UVC sources by Wang, Minghao, Lai, Alvin C.K.

“…Two single-pass air disinfection systems utilizing different form factors of Far-UVC sources were designed to achieve indoor air disinfection. The first…”
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Coordinated energy management for commercial prosumers integrated with distributed stationary storages and EV fleets by Zheng, Siqian, Huang, Gongsheng, Lai, Alvin C.K.

“…•Propose potential coordinated approaches for distributed prosumers and EV fleets.•Utilize EV fleets to enhance renewable penetration and prolong static…”
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Disinfection by in‐duct ultraviolet lamps under different environmental conditions in turbulent airflows by Zhang, Huihui, Jin, Xin, Nunayon, Sunday Segbenu, Lai, Alvin C. K.

“…In this study, we investigated the effects of environmental factors such as airflow velocity, relative humidity (RH), temperature, and duct reflectance on the…”
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AEROSOL DEPOSITION IN TURBULENT CHANNEL FLOW ON A REGULAR ARRAY OF THREE-DIMENSIONAL ROUGHNESS ELEMENTS by Lai, Alvin C.K, Byrne, Miriam A, Goddard, Anthony J.H

“…Understanding particle deposition onto rough surfaces is important for many engineering and environmental applications. An experimental system was designed for…”
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Comparison of disinfection performance of UVC‐LED and conventional upper‐room UVGI systems by Nunayon, Sunday S., Zhang, Huihui, Lai, Alvin C. K.

“…We developed a novel, compact upper‐room ultraviolet germicidal irradiation system with light‐emitting diode sources (UR‐UVGI‐LED) to enhance the disinfection…”
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