Marcelba's profile - activity

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2015-02-05 10:02:09 -0500	commented answer	Zone Air System Sensible Cooling Energy but no cooling HVAC system installed No, but i ve got a scheduele for cooling for the Zones but actualy no system which can provide that cooling
2015-02-05 08:43:18 -0500	asked a question	Zone Air System Sensible Cooling Energy but no cooling HVAC system installed Hello, i ve got a Zone Air System Sensible Cooling Energy which is higher than zero. although i only have got a hot water coil but no cooling system. How is that possible?
2015-01-22 04:33:06 -0500	commented question	Define machines which produce heat it is a HVAC Systm with Cooling with electricity and heating with gas. When i put i machines the cooling in summer increases but in the winter time i have got a higher gas Consumption when i put in machines. so the influence of the machines in summer is right and seemed logic to me, but not in the winter. i ve go 23 degrees air temperatured defined for the zones. which part of the idf file do u need?
2015-01-16 10:02:54 -0500	commented question	Define machines which produce heat when i increase the Desing Level from my electric equipment form for example 200 to 8000 that i need more gas for heating than before. i have fraction at 0.5 so half of the heat from my machines goes into the room the rest i used for mechanical work
2015-01-16 09:54:53 -0500	commented answer	Define machines which produce heat With fraction Lost=1 i have 857 Gas and cooling in July 1101 with fraction Lost=0.5 i have Gas 1620 and Cooling in July 60 so with 0.5 some of the heat from the machines is used to warm up the room, which makes sense. But actually i should need more cooling in the summer with fraction 0.5, but here its the other way round?!
2015-01-16 09:04:09 -0500	received badge	● Supporter (source)
2015-01-16 08:55:40 -0500	asked a question	Define machines which produce heat Hello i defined a few machines which produce heat, which is given into the zone. Therefore i Defined the Field. Fraction Lost with 0.5 so half of the energy will be give to the room. I expected that i will than have lesser gas consumption for the zone, but the opposites happens. When i place more and more electric equipment into the zone, the Gas Consumption increase
2015-01-15 11:39:56 -0500	commented answer	Define wall which doesnt transfer energy ok, i designed a building which is connected with another building. Both buildings have the same temperature. In my model is only one of this two buildings. When i define the wall which is conected to the building next to it as adiabatic, would that mean that there is not heat transfer to the outside? Or would it be better to define it with a low U-value?
2015-01-15 10:30:56 -0500	commented answer	Define wall which doesnt transfer energy what do u mean with "it cannot transfer through" If the heat cannot transfer through, then it is the same as a wall with a very low U-Value, isnt it?
2015-01-15 10:27:30 -0500	received badge	● Editor (source)
2015-01-15 10:00:44 -0500	asked a question	Define wall which doesnt transfer energy Hi, i would like to define a wall as a perfekt wall which doesnt transfer heat. At first i thought i could define them as adiabatic, but later i found out that an adiabatic wall isnt a perfect insulated wall. So does anyone know how i can fix this problem. My only idea at the moment is to define the wall with a construction which has a realy small U-value.
2015-01-14 11:00:43 -0500	commented question	How can I Define the Temperature inside a Zone or Space i ve deleted it, i am new here. Didnt know that.
2015-01-14 06:39:16 -0500	received badge	● Scholar (source)
2015-01-13 11:49:35 -0500	asked a question	How can I Define the Temperature inside a Zone or Space Hey, I've be looking for a field where i can define the temperature inside a zone. Do i define it with schedules? I want to have a constant value in my Zone. This temperature should then be held with my HVAC system. I think it is not a big problem but I just can't find the field in Openstudio. Thank you very much :)
2015-01-05 10:27:40 -0500	received badge	● Student (source)
2015-01-05 09:06:34 -0500	commented answer	Problems with HVAC System yes i know i ve already fixed that, but this is not the main Problem
2015-01-05 07:28:20 -0500	asked a question	Problems with HVAC System Hello, at the moment i am writting my Bachelor Thesis about Open studio and Energy Plus. when ever i add an HVAC System to my Modle the Simulation doest work. I dont know how to fix that Problem. I ve read the erro file, but i dont find the Problem Here is the Error file: Blockquote Program Version,EnergyPlus-Windows-64 8.1.0.009, YMD=2015.01.05 14:18,IDD_Version 8.1.0.009 *********** Beginning Zone Sizing Calculations Warning GetHTSurfaceData: Surfaces with interface to Ground found but no "Ground Temperatures" were input. ~~~ Found first in surface=SURFACE 9 ~~~ Defaults, constant throughout the year of (18.0) will be used. Warning CheckUsedConstructions: There are 7 nominally unused constructions in input. ~~~ For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings; Warning SetUpZoneSizingArrays: Requested Sizing for Zone="THERMAL ZONE 1", Zone has no thermostat (ref: ZoneControl:Thermostat, et al) Warning SetUpZoneSizingArrays: Requested Sizing for Zone="THERMAL ZONE 2", Zone has no thermostat (ref: ZoneControl:Thermostat, et al) Warning Calculated design cooling load for zone=THERMAL ZONE 1 is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. Warning Calculated design heating load for zone=THERMAL ZONE 1 is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. Warning Calculated design cooling load for zone=THERMAL ZONE 2 is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. Warning Calculated design heating load for zone=THERMAL ZONE 2 is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. ********* Beginning System Sizing Calculations Warning ManageSizing: Calculated Cooling Design Air Flow Rate for System=PACKAGED ROOFTOP AIR CONDITIONER is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. Warning ManageSizing: Calculated Heating Design Air Flow Rate for System=PACKAGED ROOFTOP AIR CONDITIONER is zero. ~~~ Check Sizing:Zone and ZoneControl:Thermostat inputs. Severe Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 2", Design Specification Outdoor Air Object Name blank ~~~ For Zone="THERMAL ZONE 1". ~~~ This field either needs to be filled in in this object or Sizing:Zone object. ~~~ For this run, default values for these fields will be used. Severe Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 2", Design Specification Outdoor Air Object Name blank ~~~ For Zone="THERMAL ZONE 2". ~~~ This field either needs to be filled in in this object or Sizing:Zone object. ~~~ For this run, default values for these fields will be used. Severe For Controller:OutdoorAir: CONTROLLER OUTDOOR AIR 2 ~~~ maximum outdoor air flow rate (10.0000) < minimum outdoor air flow rate (11.0000) ~~~ To set the minimum outside air flow rate use the "Design (minimum) outdoor air flow rate" field in the Sizing:System object Warning Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE 1". ~~~ No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in this Controller:MechanicalVentilation Object. ~~~ Check ventilation rate in Controller:MechanicalVentilation object. Simulation will continue. Warning Controller:MechanicalVentilation = "CONTROLLER MECHANICAL VENTILATION 2", Zone="THERMAL ZONE 2". ~~~ ** No "PEOPLE" object has been specified in the idf for this zone, but the ventilation rate is > 0 in ... (more)