Topic: Technical Seminar on Dynamic Glass Technology -
Introduction and Application
Organizer:
Materials Division
Date,
Time & Venue
23 July 2019, Tuesday,
Time: 6:30 -8:00 pm at 9/F, Chan Yat Mei Sophia Room at the HKIE Headquarters,
Speaker:
Ir. Andrew Xie is the
Senior Engineer of Ove Arup and Partners, which offers professional services
across almost every aspect of today’s built environment.
Ir. Xie holds a BEng
and MSc from the University of Hong Kong. He is a Chartered Engineer, a Member
of HKIE and a BEAM Pro. He has contributed to two ultra-high-rise building
which are taller than 500m and a number of complex boutique development.
Currently his professional focus is the building envelope and the
sustainability of the built environment.
Programme
Highlights
Glass is one of the
greatest invention of human being. In the building and infrastructure, it is
widely used with great appreciation as a transparent shield that shelters the
occupants against unfavorable weather but allowing an interaction in vision
with the external environment. Traditional architectural glass with static
characteristics can only be designed as an optimal solution for the annual
statistics. It will lead to over-bright or over-shaded at certain
circumstances. Now the dynamic glass is one of the new solution being able to
correspond to a range of scenarios, enhancing the conform of occupants and
improving the performance of the building. The dynamic glass can be passive
which adapts to changing environment, or active which uses electrical
intervention to tint. The following content will be discussed in the seminar:-
1) The development of glass in architectural
engineering
2) The dilemma in the built-environment
3) Dynamic glass technology
4) Continued discussion - What is more we can
do for a greener Hong Kong?
Registration
& Enquiries
No. of Participants 80.
No prior registration is required. CPD certificate will be issued after the
talk. For enquiries, please contact Ir CS Lam at 91527659 or email lamchising@hotmail.com.
Report
Dynamic Glass Technology – Introduction and
Application
By LAM Chi-sing
A Technical seminar on Dynamic Glass Technology –Introduction and
Application was conducted on 23 July 2019. The speaker Ir Andrew Xie delivered
the history of glass from the beginning when glass come from obsidian mineral
in the old age and used for houseware. After industrialization, different
glasses were developed. Float glass was invented in 1950 and launched in UK in
1959. Tempered glass was invented in 1874. Float glass consisted a number of
composition and the major of which is silicon dioxide. The glass can absorb,
let through and reflect solar energy.
Solar energy consisted 53% of infrared light, ultra-violet 3% and
44% of visible light.
To reduce the solar transmitted and visible light transmittance,
low-E coating application to glass is one of the energy saving method. Magnetron Sputtering Vapor Deposition
(MSVD) process of solar central low E-coating and
pyrolytic process with while passive low-E coating would be considered.
For balancing the shape of daylight in different seasons, dynamic
glass technology was introduced. Two types of dynamic glass namely Thermos-chromic
(TC) and electro-chromic (EC) were introduced. The former is passive, the
latter is active.
Thermo-chromic glass is a component consisting of Suntuitive
interlayer in between two glasses with one spacer and low-e coating film. It
should become gradually change with the warmer and cooler. It based on changes
in Transmission and solar
heat gain coefficient (SHGC) of the Suntuitive window
based on brightness of sun on the window.
In electro-chromic (EC) glass, the glass is in such way that the high
visible light transmission, the high solar heat gain efficiency. It can have
more than one tint zones within single glass unit. The glass has two products.
It contained metal oxide sputtered coating type, another product consisted of
Ion-conductor polymer laminated inside between two glass panels. It has a cable
with plug for controller. In fact Dynamic glass is a new solution to help us to
adapt to the changing environment.
321 words
Photo:
souvenir presenting to the speaker Ir Andrew Xie –left second