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The Renson Headquarters
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
NatVent
Back to Back to “Select a “Select a building”building”
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Building presentation (1…)
The Renson company produces components for natural ventilation Headquarters are situated in industrial zone along a busy road Floor area: 1.350 m² Two storey building - prefabricated concrete elements Building façades
rear side of building: connected to production hall front façade:
– along busy road– south-west oriented– considerable net surface of glazing (25%)
The Renson company produces components for natural ventilation Headquarters are situated in industrial zone along a busy road Floor area: 1.350 m² Two storey building - prefabricated concrete elements Building façades
rear side of building: connected to production hall front façade:
– along busy road– south-west oriented– considerable net surface of glazing (25%)
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Building presentation (2|)
ground floor
first floor
Offices
Production hall N
45m
15mlandscape office reception & show room
meeting room
meeting room
drawing room
office 4 office 5 office 6 office 7office 1 office 2 office 3 office 8
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
1. THERMAL COMFORT: Due to the large glazing surfaces in the front façade there were serious
problems of overheating in summertime
2. INDOOR AIR QUALITY: Before the renovation the ventilation system consists only of adjustable
trickle ventilators above the windows.
It is clear that the performances of this system depend on the wind pressure on the front façade. As the wind pressure fluctuate strongly, also the air flows (energy losses) and the indoor air quality fluctuates strongly.
1. THERMAL COMFORT: Due to the large glazing surfaces in the front façade there were serious
problems of overheating in summertime
2. INDOOR AIR QUALITY: Before the renovation the ventilation system consists only of adjustable
trickle ventilators above the windows.
It is clear that the performances of this system depend on the wind pressure on the front façade. As the wind pressure fluctuate strongly, also the air flows (energy losses) and the indoor air quality fluctuates strongly.
The renovation issue
production hall
Before renovationBefore renovation
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
The building concept (1…)
In 1997 the idea arose of a thorough renovation to tackle the
problems of: overheating
fluctuating air flows
(see Chapter ‘Renovation issue’)
A detailed study of the renovation was carried out by the BBRI to
evaluate different renovation solutions: type of solar shading
possibilities and effect of intensive night ventilation
a new ventilation system based on natural supply and mechanical
exhaust
In 1997 the idea arose of a thorough renovation to tackle the
problems of: overheating
fluctuating air flows
(see Chapter ‘Renovation issue’)
A detailed study of the renovation was carried out by the BBRI to
evaluate different renovation solutions: type of solar shading
possibilities and effect of intensive night ventilation
a new ventilation system based on natural supply and mechanical
exhaust
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
The building concept (2…) Indoor Air Quality
To improve the stability of the air flows a system of natural supply & mechanical extraction was installed
Advantages: constant air flow (and IAQ) during office hours adapted air flow in meeting rooms reduced air flows (and ventilation losses) outside office hours
To improve the stability of the air flows a system of natural supply & mechanical extraction was installed
Advantages: constant air flow (and IAQ) during office hours adapted air flow in meeting rooms reduced air flows (and ventilation losses) outside office hours
ground floor
first floor
landscape office reception & show room
meeting roomproduction
hal
After renovationAfter renovation
Mechanical extraction: ductwork in false ceiling
Natural air supply: existing adjustable trickle ventilators above windows
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Building concept (3…) Thermal summer comfort
The following strategy was followed to improve summer comfort:
The following strategy was followed to improve summer comfort:
REDUCTION of DIRECT REDUCTION of DIRECT
SOLAR GAINS:SOLAR GAINS:
REDUCTION of DIRECT REDUCTION of DIRECT
SOLAR GAINS:SOLAR GAINS:
FREE-COOLING & FREE-COOLING & STORAGE:STORAGE:
night ventilation & night ventilation & thermal massthermal mass
FREE-COOLING & FREE-COOLING & STORAGE:STORAGE:
night ventilation & night ventilation & thermal massthermal mass
GLOBAL STRATEGY for GLOBAL STRATEGY for thermal comfort under thermal comfort under
summer conditionssummer conditions
GLOBAL STRATEGY for GLOBAL STRATEGY for thermal comfort under thermal comfort under
summer conditionssummer conditions
Overhangs &Overhangs &
selective glazingselective glazing
Overhangs &Overhangs &
selective glazingselective glazing
Night ventilation: Night ventilation:
partly natural - partly natural - partly mechanicalpartly mechanical
Night ventilation: Night ventilation:
partly natural - partly natural - partly mechanicalpartly mechanical
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Several shading devices were evaluated using thermal simulations Finally a combination of overhangs + selective glazing was chosen
Several shading devices were evaluated using thermal simulations Finally a combination of overhangs + selective glazing was chosen
Building concept (4…) Thermal summer comfort
Reduction of solar heat gains
10
15
20
25
30
35
40
8/06/960:08
8/06/9612:08
9/06/960:08
9/06/9612:08
10/06/960:08
10/06/9612:08
11/06/960:08
11/06/9612:08
12/06/960:08
12/06/9612:08
13/06/960:08
13/06/9612:08
14/06/960:08
14/06/9612:08
time (days)
tem
pe
ratu
re (
°C)
Reference model
External temperature
Horizontal overhang
External screen Selective glazing
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Selective glazing: HEAT: This special type of glazing has a
low solar transmission (g-value = 34% instead of 77% for double glazing).
LIGHT: However due to a special coating technology still 66% of the light is still transmitted.
Selective glazing: HEAT: This special type of glazing has a
low solar transmission (g-value = 34% instead of 77% for double glazing).
LIGHT: However due to a special coating technology still 66% of the light is still transmitted.
Building concept (5…) Thermal summer comfort
Reduction of solar heat gains
Overhangs: The performances of the overhangs
depend on the orientation of the façade
and the position of the sun (see chart - next
slide)
Overhangs: The performances of the overhangs
depend on the orientation of the façade
and the position of the sun (see chart - next
slide)
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
31
-De
c
30
-Ja
n
1-M
ar
31
-Ma
r
30
-Ap
r
30
-Ma
y
29
-Ju
n
29
-Ju
l
28
-Au
g
27
-Se
p
27
-Oct
26
-No
v
26
-De
c
25
-Ja
n
Ave
rag
e sh
adin
g o
n w
ind
ow
(%
)1.4 m
1.2 m
1.0 m
0.8 m
0.6 m
Performance of overhang for south-west façade
WINTER: Little shading - low position of sun
SUMMER: Much shading - high position of sun
Building concept (6…) Thermal summer comfort
Reduction of solar heat gains
Depth of overhang
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Building concept (7…) Thermal summer comfort
Night ventilation
Night ventilation:
Supply: natural supply through large grilles in front façade
Extraction: Natural extraction for offices
on ground floor: based on stack effect of chimney on the roof
Mechanical extraction (fan) for offices on first floor ( There were practical problems to install a chimney)...
Night ventilation:
Supply: natural supply through large grilles in front façade
Extraction: Natural extraction for offices
on ground floor: based on stack effect of chimney on the roof
Mechanical extraction (fan) for offices on first floor ( There were practical problems to install a chimney)...
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
production hall
production hall
Night ventilation of first floor
Building concept (8...) Thermal summer comfort
Night ventilation
Ventilation of ground floor chimneychimney
fanfan
Large burglar-proof ventilation grille for intensive night ventilation
Large burglar-proof ventilation grille for intensive night ventilation
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
production hall
production hall
Night ventilation of first floor
Building concept (8...) Thermal summer comfort
Night ventilation
Ventilation of ground floor chimneychimney
fanfan
chimneychimney
Chimney - internal view & control panelChimney - internal view & control panel
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Building concept (9|) Thermal summer comfort
Night ventilation - remark
The potential for night ventilation in this office will be limited because the low accessibility of the thermal mass. The offices have:
false ceilings carpeted floors light internal walls
The potential for night ventilation in this office will be limited because the low accessibility of the thermal mass. The offices have:
false ceilings carpeted floors light internal walls
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Monitoring results (1…)
Several parameters were monitored during the summer of ‘97: temperatures, air changes, CO2 -conc.,...
Renovation had not been completed before the monitoring began:
Solar shading (selective glazing & overhangs) were not yet installed
Night ventilation– large supply grilles were installed– extraction chimney & fan not yet
installed: (building was ventilated by opening doors to the production hall)
Several parameters were monitored during the summer of ‘97: temperatures, air changes, CO2 -conc.,...
Renovation had not been completed before the monitoring began:
Solar shading (selective glazing & overhangs) were not yet installed
Night ventilation– large supply grilles were installed– extraction chimney & fan not yet
installed: (building was ventilated by opening doors to the production hall)
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Monitoring results (2|) Summer ‘97
5
10
15
20
25
30
35
1/8 2/8 3/8 4/8 5/8 6/8 7/8 8/8 9/8 10/8 11/8 12/8 13/8 14/8 15/8 16/8 17/8 18/8
time (days)
tem
per
atu
re (
°C)
office 1&2 office 3 office 4 exterior
Due to the lack of solar shading (renovation not yet completed) The internal temperatures are too high: >30°C
For more results: see the detailed Monitoring Report (see Chapter: “More information…”
Due to the lack of solar shading (renovation not yet completed) The internal temperatures are too high: >30°C
For more results: see the detailed Monitoring Report (see Chapter: “More information…”
Still: More about night ventilation: x ACH / working thermal mass...
NatVent
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Back to Back to “Select a “Select a building”building”
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Major Findingds The monitoring results show that there is a need for solar shading
(as foreseen in the total renovation plan) As the renovation had not been completed before the monitoring
began one can not draw conclusions on the concept.
There were specific problems with the renovation of this building It was difficult to ventilate all the offices at night by natural ventilation
(practical problems to install second chimney replaced by fan)
The building has a low accessibility of the thermal mass
The monitoring results show that there is a need for solar shading (as foreseen in the total renovation plan)
As the renovation had not been completed before the monitoring began one can not draw conclusions on the concept.
There were specific problems with the renovation of this building It was difficult to ventilate all the offices at night by natural ventilation
(practical problems to install second chimney replaced by fan)
The building has a low accessibility of the thermal mass
More information...
NatVent
Back to Back to “Select a “Select a building”building”
Renovation issueRenovation issue
Major findingsMajor findings
The RENSON-The RENSON-HeadquartersHeadquarters
More More information...information...
Monitoring Monitoring resultsresults
Building Building presentationpresentation
Indoor Air Indoor Air QualityQuality
Summer Summer ComfortComfort
Building conceptBuilding concept
Find more information on the PROBE building in the following documents:
\Reports \Monitoring Reports \Summary Reports\be3summ.pdf global presentation of the buildings (4p./building) contents: building description - ventilation strategy and technology -
winter and summer monitoring results - conclusions
\Reports \Monitoring Reports \Detailed Reports\be3det.pdf detailed reports of all 19 monitoring campaigns (20p./campaign) contents: monitoring set up - analysis of results - conclusions
Find more information on the PROBE building in the following documents:
\Reports \Monitoring Reports \Summary Reports\be3summ.pdf global presentation of the buildings (4p./building) contents: building description - ventilation strategy and technology -
winter and summer monitoring results - conclusions
\Reports \Monitoring Reports \Detailed Reports\be3det.pdf detailed reports of all 19 monitoring campaigns (20p./campaign) contents: monitoring set up - analysis of results - conclusions
You can read and print pdf-files with the Acrobat® Reader ®3.0. Program. This program is free.
Download it from the Acrobat web site: www.adobe.com OR run the installation file ar32e301(1).exe in the directory \Installation
You can read and print pdf-files with the Acrobat® Reader ®3.0. Program. This program is free.
Download it from the Acrobat web site: www.adobe.com OR run the installation file ar32e301(1).exe in the directory \Installation