1. The European Office Building S.H. Liem, A.H.C. van Paassen M.Verwaal, H.F. Broekhuizen Delft, April 1998 S.H. Liem, A.H.C. van Paassen M.Verwaal, H.F. Broekhuizen Delft, April 1998 NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Office Building The European Office Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring

2. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring The European Patent Building was built in 1972 by Ir. R.D. Bleeker. The building consists of a square main building of four floors with a rectangular tower of 86 m (25 floors) height. The office rooms (3.5 * 5.5 * 2.75 m) are located around the periphery of the whole main building and the tower. A fix concrete band of 0.6 m width with three slits in it, protracting 0.9 m from the façade, functions as a very effective solar shading device. The public rooms in the main building are fully air conditioned. The toilets and lifts are all mechanically ventilated. The office rooms are naturally ventilated with two upper (0.35*0.70 m) and two lower (1.20*0.70 m) vent windows and a cord operated trickle vent above the lower view window (1.20 * 1.80 m). Building presentation Technical specifications Building presentation (1...) Technical specifications

3. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Building presentation Inside view - 1 Building presentation (2...) Inside view - 1 With the four vent windows fully open the ratio vent opening to net floor area is approximately 5.6%. Simulations performed by TU Delft in the framework of the NatVent™ project showed that 2% is sufficient (in the case of cross-ventilation). Trickle vent Four openable windows Fixed solar shading in front of the windows

4. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Building presentation External view - 1 Building presentation (2...) External view - 1 Outside view of the fixed solar shading

5. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Building presentation Inside view - 2 Building presentation (3...) Inside view - 2 View from a room into a corridor: Although the tables are full with loose documents during the hot summer weeks the windows and the doors to the corridors are left open to cross ventilate the rooms in warm weather. View into the corridor. The air flow in the corridor is very high as can be seen by fluttering papers on the notice board, but it does not seem to bother the occupants. There is no vertical air movement from floor to floor via the stairwell because the staircase is closed off by heavy doors. Position of the global temperature sensors

6. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Building presentation (4|) building concept Thermal summer comfort: Overheating is avoided by: reduction of the solar gains: All building façades have a fixed solar shading. the use of intensive night ventilation: By opening the windows the thermal mass of the building (heavy internal walls) can be cooled down. The intensive ventilation is based on cross ventilation (when the internal doors are open). The cooling effect of the intensive ventilation is used at night and during the day, (when the Text < Tint). The indoor air quality during the office hours in winter and summer time is controlled by the occupants who use the trickle vent and the windows. Office SWOffice NECorridor

7. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Monitoring Monitoring plan Monitoring (1...) Monitoring plan 4 rooms on the 15 th floor of the tower have been monitored: 2 rooms on the SW- façade, room 15.13 & 15.16 2 rooms on the NE façade, room 15.43 and 15.45

8. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Monitoring (2|) The monitoring installation Air temperature was monitored in each room at 0.1 m and 1.10 m and the wall temperature was also monitored. The global temperature is approached by putting the temperature probe in a black Ping-Pong ball. The outside temperatures on the SW- and NE façade were monitored too. The wind velocity and solar radiation were obtain from the BEMS. Ventilation and CO 2 levels were monitored with a extended Bruel and Kjær gas analyser. Global temperature sensor

9. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Monitoring results The following slides show some summer and winter monitoring results. THERMAL SUMMER COMFORT: The second week of August 1997 was a very hot week with daytime temperatures of over 30 °C and night time temperatures never below 20 °C. Internal temperatures remained at acceptable levels. The amount of overheating hours differ very much from room to room (depending on orientation, internal gains, …). INDOOR AIR QUALITY: The CO 2 concentration level is approximately 750 ppm during working hours; at night and at the weekend it drops to the outdoor level of 400 ppm. This level does not increase during the winter. The ventilation rate is very high in the summer and in the winter. In the winter, during office hours ventilation rates of up to 10 ach have been reached.At night and outside office hours these drop to 2-3 ach.

10. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Summer monitoring (1...) Hot period in the summer Outdoor temperatures reach 34°C. Due to effective solar shading and intensive night cooling, internal temperatures stay below 29°C.

11. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Summer monitoring (2...) Hot period - Temperature distribution The overheating hours differ very much from room to room: room 15.13 (SW) has the most overheating hours (164 hours), room 15.45 (NE) has 148.5 overheating hours.

12. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring When the internal temperature is higher than the outside temperature, intensive ventilation is used to cool down the building (thermal mass). The ventilation is very intensive: 5 to 20 air changes per hour Summer monitoring (3...) Typical period - air change rate

13. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring The CO 2 concentration level is approximately 750 ppm during working hours; at night and in the weekends this drops to the outdoor level of 400 ppm. Due to the high ventilation rates, this level is much lower than the limit of 1200 ppm: the IAQ can be considered as good. Summer monitoring (4|) Typical period - indoor air quality

14. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Winter monitoring (1...) typical period - temperatures Tint. Text. The indoor temperature in room 15.13 in winter time is 23 to 24°C. This temperature is rather high and can be reduced to a lower level. (The heating is on continuously - at night and at weekends - because it is a high efficiency system with low water temperature).

15. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Winter monitoring (2|) typical period - air change rate Due to high ventilation rates during office hours, the CO 2 conc. level is approximately 750 ppm during working hours. The Indoor Air Quality can be considered as good. At night and at the weekends the CO 2 conc drops to the outdoor level of 400 ppm. Outside office hours the ventilation rate is reduced to 2 to 3 ACH to limit the ventilation losses. Tint. Air change rate Indoor CO 2 -conc. Weekend

16. NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Due to intensive ventilation and fixed solar shading the indoor summer comfort is acceptable during hot periods. The Indoor Air Quality during office hours can be considered as good (CO 2 concentration of 750 ppm in office hours and 400 ppm at night and at weekends). The ventilation rate in the summer is 10 to 15 ach and in the winter 5 to 10 ach (during office hours). NatVent Major findings

17. More information... NatVent Presentation of the building Presentation of the building Monitoring set-up Monitoring set-up Major findings Major findings The European Patent Building The European Patent Building More information... More information... Back to “Select a building” Back to “Select a building” Monitoring results Monitoring results The summer monitoring The summer monitoring The winter monitoring The winter monitoring Find more information on the PROBE building in the following documents: \Reports \Monitoring Reports \Summary Reports\nl1summ.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\nl1det.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\nl1summ.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\nl1det.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