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  • 1.Mechanical ventilation with heat recovery technical training marted 17 gennaio 2012

2. Technical training - part A Mecchanical ventilation heat recovery 2 Ventilation Ventilation is the process of replacing waste air in any indoor space to provide high air quality for occupants comfort and wellbeing. marted 17 gennaio 2012 3. Technical training - part A Mecchanical ventilation heat recovery 3 Benets Air quality - bacteria and fungi Reduction of air pollution due to high concentration of: - chemical substances (radon, smoke, carbone monoxide and dioxide, volatile organic compounds) - humidity and smelles Low energy consumption - ventilation heat losses reductione - wellbeing of walls and structures protected from indoor humidity The correct ventilations rate ensure: Indoor comfort Controllo delle condizioni microclimatiche rispetto a: - air temperature - air humidity - air movements and speed marted 17 gennaio 2012 4. Technical training - part A 4 Natural ventilation The ventilation ow rates are not constant but depending on external conditions In natural ventilation external air ows to an indoor space as a result of pressure difference due to - wind - temperature differences Mecchanical ventilation heat recovery marted 17 gennaio 2012 5. Technical training - part A 5 Natural ventilation - NATURAL VENTILATION is based only on users sansations about indoor air quality. External air ows throught windows and doors opened by the users. - NATURAL CONTROLLED VENTILATION is based on users or mechanical operations according to xed and controlled criteria Mecchanical ventilation heat recovery marted 17 gennaio 2012 6. Technical training - part A 6 Natural ventilation Advantages: - no fan and no energy consumption - little investment Mecchanical ventilation heat recovery Drawbacks: - bad control of air change - noises coming from the openings - people feeling cold ows near the openings marted 17 gennaio 2012 7. Technical training - part A Mechanical ventilation heat recovery 7 Mechanical ventilation In this case, the new air is introduced naturally in the spaces thanks to adjustable air-vents situated on the outside walls. On the other hand, foul air is extracted mechanically (fans). With this extraction, the spaces are on depression and this favours the inltration of new air. Simple ow ventilation marted 17 gennaio 2012 8. Technical training - part A Mechanical ventilation heat recovery 8 Mechanical ventilation Simple ow ventilation Advantages: - symple system and easy to use - extracted air debits are controlled - no ventilation network is nedeed Drawbacks: - air-vents are source of noises - risk of cold air ow due to air-vents badly set - no heat recovery marted 17 gennaio 2012 9. Technical training - part A Mechanical ventilation heat recovery 9 Mechanical ventilation Double ow ventilation New air ltered and preheated in winter is mechanically distribuited by a ductwork. Air is mechanically extracted by another ductwork The heart of the system is a heat exchanger witch ensures the thermal energy recovery from extracted air. marted 17 gennaio 2012 10. Technical training - part A Mechanical ventilation heat recovery 10 Mechanical ventilation Double ow ventilation Simple ow ventilation Advantages: - debits air controlled everyehere - air ltered and treated before distribution - heat recovey from polluted air ow Drawbacks: - more expensive system - ductworks integrated in the structure - important and frequent maintenance marted 17 gennaio 2012 11. Technical training - part A Mechanical ventilation heat recovery 11 The heart of the system: the air to air heat exchanger The counter ow energy recovery heat exchanger recovers waste heat from extracted air Heat recovery In the countercurrent exchanger two air rates ow in opposite directions to each other: the maximum amount of heat that can be obtained is higher than with other exchangers. marted 17 gennaio 2012 12. Technical training - part A Mechanical ventilation heat recovery 12 Heat recovery The heart of the system: the air to air heat exchanger external air polluted internal air internal air preheated air marted 17 gennaio 2012 13. Technical training - part A Mechanical ventilation heat recovery 13 ALTAIR HEAT EXCHANGERS -polypropylene counterflow heat exchanger -high heat recovery efficiency (up to 95%) -automatic exchanger defrost function -automatic by-pass - easy maintenance operations thanks to the removable panel marted 17 gennaio 2012 14. Technical training - part A Mechanical ventilation heat recovery 14 Double ow ventilation with heat recovery The exchanger recovers heat from extracted air to warm incoming airAir is extracted from polluted spaces such as bathrooms and kitchens Air is distributed in the other spaces such as bedrooms and livin rooms marted 17 gennaio 2012 15. Technical training - part A Individual ventilation units 15 Model Air flow m3 /h Microprocessor* Power supply V Fans power W Sensible heat recovery efficiency % Weight Kg CP 150 150 CTR 230 43 >92 38 CPX 150 150 CTRX 230 43 >92 38 Data referred to the following conditions: Dbt external air -5C; external R.H. 80%; Dbt environment 20C; environment R.H. 50%; 50% nominal airflow Mechanical ventilation units with high efficiency heat recovery. ALTAIR CP marted 17 gennaio 2012 16. Technical training - part A 16 Mechanical ventilation units with high efficiency heat recovery. ALTAIR CP -150m3 /h nominal airflow -compact size and reduced height -vertical installation on wall or horizontal on ceiling -low consumption radial fans with electronic motors -G4 filters for exhaust air -F7 low pressure drop filters for fresh air -plug-n-play connection with electrical panel -standard microprocessor control CTR* -advanced microprocessor control CTRX* Individual ventilation units marted 17 gennaio 2012 17. Technical training - part A 17 Mechanical ventilation units with high efficiency heat recovery. ALTAIR HR - VR Model Air flow m3 /h Microprocessor* Power supply V Fans power W Sensible heat recovery efficiency % Weight Kg HR 300 350 CTR 230 71 x 2 >93 52 VR 300 350 CTR 230 71 x 2 >93 48 HR 500 500 CTR 230 200 x 2 >91 52 VR 500 500 CTR 230 200 x 2 >91 48 HRX 300 350 CTRX 230 71 x 2 >93 52 VRX 300 350 CTRX 230 71 x 2 >93 48 HRX 500 500 CTRX 230 200 x 2 >91 52 VRX 500 500 CTRX 230 200 x 2 >91 48 Data referred to the following conditions: Dbt external air -5C; external R.H. 80%; Dbt environment 20C; environment R.H. 50%; 50% nominal airflow Individual ventilation units marted 17 gennaio 2012 18. Technical training - part A 18 Mechanical ventilation units with high efficiency heat recovery. ALTAIR VR -two models available: 350m3/h and 500m3/h nominal airflow -VR version for vertical installation on wall or floor -HR version for horizontal installation on floor or ceiling -low consumption radial fans with electronic motors -G4 filters for exhaust air -F7 low pressure drop filters for fresh air -plug-n-play connection with electrical panel -standard microprocessor control CTR* -advanced microprocessor control CTRX* ALTAIR HR Individual ventilation units marted 17 gennaio 2012 19. Technical training - part A 19 Individual ventilation units ALTAIR SP Model Air flow m3 /h Microprocessor* Power supply V Fans power W Sensible heat recovery efficiency % Weight Kg SP 300 350 CTR 230 71 x 2 >92 45 SPX 300 350 CTRX 230 71 x 2 >92 45 SP 500 500 CTR 230 200 x 2 >90 46 SPX 500 500 CTRX 230 200 x 2 >90 46 Data referred to the following conditions: Dbt external air -5C; external R.H. 80%; Dbt environment 20C; environment R.H. 50%; 50% nominal airflow Mechanical ventilation units with high efficiency heat recovery. Separable ventilating unit and heat recovery module. marted 17 gennaio 2012 20. Technical training - part A 20 Individual ventilation units ALTAIR SP Mechanical ventilation units with high efficiency heat recovery. Separable ventilating unit and heat recovery module. - two models available: 350m3/h and 500m3/h nominal airflow - separable ventilating module and heat recovery unit - casing made of high density PPE and steel - horizontal installation on floor or ceiling - low consumption radial fans with electronic motors - G4 filters for exhaust air - F7 low pressure drop filters for fresh air - plug-n-play connection with electrical panel - standard microprocessor control CTR* - advanced microprocessor control CTRX* - inspectionable exchanger and filters marted 17 gennaio 2012 21. Technical training - part A Collective Ventilation Units 21 Mechanical Ventilation System for collective dwellings Renewal of the air in single flats is ensured by a couple of centralised fans located on the roof or on a terrace of the building. Heat recovery is made by recovery u n i t s l o c a t e d i n t h e s i n g l e apartments. marted 17 gennaio 2012 22. Technical training - part A Collective Ventilation Units 22 HELIX Air ventilating units to be interfaced with heat recovery modules: - nominal airflow from 2000m3/h to 5600m3/h - high values of static pressure available to the ducting - inverter controlled centrifugal blowers -constant pressure -double panels casing with rockwall insulation -differential and average pressure sensors Mechanical Ventilation System for collective dwellings marted 17 gennaio 2012 23. Technical training - part A Collective Ventilation Units 23 ALTAIR XC - two models available: 100m3/h and 200m3/h nominal airflow - horizontal installation with beneath access for inspection -polypropylene counterflow heat exchanger -high heat recovery efficiency (up to 95%) -G4 filter for exhaust air -F7 low pressure drop filters for fresh air High efficiency heat recovery modules Mechanical Ventilation System for collective dwellings marted 17 gennaio 2012 24. Technical training - part A Collective Ventilation Units 24 ALTAIR SP High efficiency heat recovery modules -two models available: 350m3/h and 500m3/h nominal airflow -to be int