Journal of Hospital Infection,
Год журнала:
2024,
Номер
148, С. 1 - 10
Опубликована: Март 4, 2024
Many
UK
hospitals
rely
heavily
on
natural
ventilation
as
their
main
source
of
airflow
in
patient
wards.
This
method
can
have
cost
and
energy
benefits,
but
it
may
lead
to
unpredictable
flow
patterns
between
indoor
spaces,
potentially
leading
the
unexpected
transport
infectious
material
other
connecting
zones.
However,
effects
weather
conditions
airborne
transmission
are
often
overlooked.
Sustainability,
Год журнала:
2022,
Номер
14(22), С. 14966 - 14966
Опубликована: Ноя. 12, 2022
This
paper
presents
a
detailed
analysis
to
optimize
natural
ventilation
performance
in
educational
buildings
minimize
the
probability
of
viral
infection
(POI)
and
avoid
draught
discomfort.
A
whole
building
energy
simulation
tool
has
been
coupled
with
Wells–Riley
equation
predict
Fanger’s
estimate
risk
for
classroom
environments.
Several
parameters
have
investigated,
including
window
opening
fraction
(WOF),
volume-to-student
ratio,
number
source
patients,
exposure
time.
The
confirmed
dual
effect
space
volume
on
POI
where
can
be
increased
or
decreased
simultaneously
when
is
increased.
Therefore,
WOF/(Volume/Student)
ratio
introduced,
an
optimization
performed
determine
optimum
that
delivers
lowest
POI.
results
showed
between
0.1
0.17
recommended
guarantee
low
values
standard
Volume/Student
6
m3.
Even
though
high
rates
are
required
prevent
infection,
it
will
certainly
increase
risk.
optimal
maintain
minimum
risk,
which
achieved
by
design
windows
implementing
control
systems
operations
turbulence
effects
reduce
possibility
Buildings,
Год журнала:
2023,
Номер
13(4), С. 871 - 871
Опубликована: Март 26, 2023
Ventilation
systems
are
one
of
the
most
effective
strategies
to
reduce
risk
viral
infection
transmission
in
buildings.
However,
insufficient
ventilation
rates
crowded
spaces,
such
as
schools,
would
lead
high
risks
transmission.
On
other
hand,
excessive
might
significantly
increase
cooling
energy
consumption.
Therefore,
energy-efficient
control
methods,
Demand
Control
(DCV),
typically
considered
maintain
acceptable
indoor
air
quality.
it
is
unclear
if
DCV-based
controls
can
supply
adequate
minimize
probability
(POI)
spaces.
This
paper
investigates
benefits
optimized
strategies,
including
conventional
mechanical
(MV)
and
DCV,
reducing
POI
consumption
through
a
detailed
sensitivity
analysis.
The
study
also
evaluates
impact
rate,
social
distancing,
number
infectors
on
performance
systems.
A
coupling
approach
calibrated
model
school
building
Jeddah,
KSA,
with
validated
Wells–Riley
implemented.
Based
findings
this
study,
proper
adjustment
DCV
set
point
necessary
levels.
Moreover,
optimal
values
2
ACH
for
rate
m
distance
recommended
deliver
levels,
use,
CO2
concentration
building.
Finally,
confirms
that
increasing
more
than
distancing
reduction
achieved
at
cost
higher
energy.
Sustainability,
Год журнала:
2023,
Номер
16(1), С. 271 - 271
Опубликована: Дек. 27, 2023
Enclosed-space
ventilation
plays
a
pivotal
role
in
enhancing
indoor
air
quality
(IAQ).
Various
regulations
and
guidelines
determine
minimum
fresh
requirements,
varying
by
the
application,
country,
etc.
The
present
study
employs
real-time
CO2
measurements
to
calculate
actual
change
rate
(ACH)
models
building’s
compliance
with
Chartered
Institution
of
Building
Services
Engineers
(CIBSE)
assess
its
impact
on
IAQ.
contaminant
considered
is
SARS-CoV-2
virus
multiple
infectors,
calculates
virus’s
transmission
risk
under
different
scenarios.
Fresh
assumed
be
provided
mechanical
or
hybrid
ventilation.
results
reveal
that
current
building
conditions
are
unacceptable,
showing
significant
gap
from
recommended
guideline
rates.
Meeting
CIBSE
recommendations
ensures
safety
terms
concentration.
However,
extreme
five
findings
show
14%
reduction
efficacy.
Among
scenarios,
combining
rates
natural
ventilation,
30%
door
window
opening
class
outset,
proves
most
effective
reducing
risk,
58–70%
condition.
Furthermore,
implementing
supplementary
measures
like
cleaners
resulted
an
additional
28–50%
risk.
Journal of Hospital Infection,
Год журнала:
2024,
Номер
148, С. 1 - 10
Опубликована: Март 4, 2024
Many
UK
hospitals
rely
heavily
on
natural
ventilation
as
their
main
source
of
airflow
in
patient
wards.
This
method
can
have
cost
and
energy
benefits,
but
it
may
lead
to
unpredictable
flow
patterns
between
indoor
spaces,
potentially
leading
the
unexpected
transport
infectious
material
other
connecting
zones.
However,
effects
weather
conditions
airborne
transmission
are
often
overlooked.
