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[EnergyPlus_Support] Regarding the Temperature Set point and Fan night cycle on/off





Hi every one
 
 
1.If a zone temperature  is above or Below the Temperatue set point of (68 - 76)F the zone hour is considered un met hour, my question is which standard sets these limits of (68-76)F and in which document could i be able to find this. and is the temperature limit is 68-76 F or is there any tolerences.
 
2."Fan should be cycled on during un occupied hours as per ASHRAE 90.1 G 3.1.2.4 .If the supply fan is modeled as cycling and fan energy is included in the energy-efficiency rating of the equipment, fan energy shall not be modeled explicitly". my question is wether the fan should be cycled on/off in both the base and the proposed case. if the Fan power is not splitted and it is included in the EER of the unit , when the fan is cycling the cooling unit will not run and the energy will not be consumed by the fan. the energy will only be consumed when the cooling unit is running , since the EER for the unit is inclusive of the fan energy . since there wont be any energy consumption during the cycling time , why do we need to do this. can we model the building with out the cycling.
 
Regards
vignesh.

--
vigneshkumar


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