Sustainable Education Building Design at NUIG

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The New Engineering Building at the National University of Ireland in Galway was designed as a living laboratory of sustainability for students. An article in the CIBSE Journal looks at its complex heating and cooling systems.

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  • CIBSE Journal January 2012 www.cibsejournal.com28

    BUILDING CASE STUDYEDUCATING ENGINEERS

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  • January 2012 CIBSE Journal 29www.cibsejournal.com

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  • BUILDINGSATRIUMTHROUGHTRANSFERGRILLESSETINTHEDOORS!DIFFERENTNATURALVENTILATIONSOLUTIONISUSEDFORTHECLASSROOMSONTHESECONDANDTHIRDOORSOFTHENORTHERNELEVATION4HESEROOMSBACKONTOACIRCULATIONCORRIDOR"ECAUSETHEROOMSARETOODEEPTOBEVENTILATEDBYTHEFAlADEALONEDUCTSHAVEBEENINSTALLEDABOVETHECORRIDORTOFORMALINKWITHTHECENTRALLIGHTWELLTOENCOURAGEAIRMOVEMENT4HEDUCTSARETTEDWITHMODULATINGDAMPERSCONTROLLEDBYTHE"-3&ORTHEPOSTGRADUATEAREASOCCUPYINGTHETOPTWOOORSONTHEBUILDINGSSOUTHERNELEVATIONTHENATURALVENTILATIONSOLUTIONHASBEENCOMBINEDWITHANAIRCONDITIONINGOPTIONTOPROVIDEAMIXEDMODESOLUTION&ORTHEBULKOFTHEYEARTHESEARENATURALLYVENTILATEDUSINGWHAT-OONEYDESCRIBESASACLIMATEFAlADE4HISISANMMDEEPTRIPLESKINGLAZEDFAlADEWITHADOUBLEGLAZEDINNERLEAFANDASINGLEGLAZEDOUTERLEAFCOVERINGTHEBUILDINGSSOUTHERNELEVATION4HECAVITYBETWEENTHEINNERANDOUTERLEAFISVENTILATEDBYLOUVRESATTHETOPOFTHEFAlADE)NWINTERWITHTHELOUVRESCLOSEDTHESOUTHFACINGFAlADEPREHEATSTHEFRESHAIRBEFOREITENTERSTHROUGHWINDOWSOPENING

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    CIBSE Journal January 2012 www.cibsejournal.com30

    BUILDING CASE STUDYEDUCATING ENGINEERS

    The natural ventilation strategy is helped by the exposed concrete softs, which add thermal mass. In its basic format, the ventilation strategy is based on two rows of opening windows, one above the other. The high-level windows open and close under control of the building management system (BMS), while the lower windows can be opened manually. For the ofces and laboratories on the eastern elevation the

    system is controlled as follows:L As the air temperature rises above summer and winter operational settings, the BMS will progressively open the high-level windows.L In winter (from October to the end of April), if the lighting passive infrared sensor (PIR) detector indicates a room is occupied, and when CO2 levels exceed the zone set point, the BMS will open the high-level windows by 5%.

    L The windows will remain open unless the wind speed exceeds a pre-set level, it starts to rain or internal air temperature falls.L The occupants can override the BMS using a wall-mounted rocker switch to open or close the windows.L In addition, the occupants can also open the lower line of windows manually.L At night the windows will open to remove excess heat under a night purge strategy.

    Ventilation Building management system

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