In simulation, you may not need to switch off the pump by another controller.
When the flow is zero, the power consumption is zero. Is it on or off? you answer. I do not care. Zero power consumption, the pump is off. Dr. Li. An intermitent pump in EPlus is one which can be switched on and off.
It may turn itself off, if the pressure is too high for safety reasons. This is why you have a by-pass branch in the loop.
the zone air thermostat turn off the burner? It should not turns off the pump at the same time, unless the pump has a by-pass.
Dr.Li : in the building that i simulated : the thermostat of boiler ( aquastat ) switch on/off the burner , and the thermostat surface on the main return pipe hot water loop that it controls hot water pump (HW pump ) and another thermostat on the domostic hot water pipe of coil tank for domostic hot water that controls when water of in the coil needs heat
To: EnergyPlus_Support@xxxxxxxxxxxxxxx Dr.Li can you say what does intermitent pump in energyplus?
the pump will run at its capacity if a load is sensed and will shut off if there is no load on loop ,
can you explain it please ?
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 9:36 PM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff You have some input to the IDF for the DHW usage. I have no idea whether it is running or not in the simulation. Please do not show me a spread sheet for some measured results, and theb link my comments for the spread sheet to the simulation that I do not know. Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Mon, 20 Feb 2012 17:02:33 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
Dear Dr.Li ,
i dont undrestandt you said i was not using the DHW,
i use :
Schedule:Compact,
Sinks Flow Schedule, !- Name Any Number, !- Schedule Type Limits Name THROUGH: 12/31, !- Field 1 FOR: AllDays, !- Field 2 UNTIL: 1:00, 0.003, !- Field 4 UNTIL: 2:00, 0.001, !- Field 6 UNTIL: 3:00, 0, !- Field 8 UNTIL: 4:00, 0, !- Field 10 UNTIL: 5:00, 0.001, !- Field 12 UNTIL: 6:00, 0.028, !- Field 14 UNTIL: 7:00, 0.105, !- Field 16 UNTIL: 8:00, 0.1, !- Field 18 UNTIL: 9:00, 0.081, !- Field 20 UNTIL: 10:00, 0.059, !- Field 22 UNTIL: 11:00, 0.051, !- Field 24 UNTIL: 12:00, 0.037, !- Field 26 UNTIL: 13:00, 0.031, !- Field 28 UNTIL: 14:00, 0.026, !- Field 30 UNTIL: 15:00, 0.023, !- Field 32 UNTIL: 16:00, 0.033, !- Field 34 UNTIL: 17:00, 0.041, !- Field 36 UNTIL: 18:00, 0.063, !- Field 38 UNTIL: 19:00, 0.075, !- Field 40 UNTIL: 20:00, 0.066, !- Field 42 UNTIL: 21:00, 0.059, !- Field 44 UNTIL: 22:00, 0.046, !- Field 46 UNTIL: 23:00, 0.046, !- Field 48 UNTIL: 24:00, 0.025; !- Field 50 =========== ALL OBJECTS IN CLASS: WATERUSE:EQUIPMENT ===========
WaterUse:Equipment,
Sinks, !- Name Sinks, !- End-Use Subcategory 0.000158, !- Peak Flow Rate {m3/s} Sinks Flow Schedule, !- Flow Rate Fraction Schedule Name Sinks and Showers Temp Schedule; !- Target Temperature Schedule Name !- =========== ALL OBJECTS IN CLASS: WATERUSE:CONNECTIONS =========== WaterUse:Connections, Domestic Hot Water, !- Name Domestic Hot Water Inlet Node, !- Inlet Node Name Domestic Hot Water Outlet Node, !- Outlet Node Name , !- Supply Water Storage Tank Name , !- Reclamation Water Storage Tank Name , !- Hot Water Supply Temperature Schedule Name
, !- Cold Water Supply Temperature Schedule Name NONE, !- Drain Water Heat Exchanger Type , !- Drain Water Heat Exchanger Destination , !- Drain Water Heat Exchanger U-Factor Times Area {W/K} Sinks; !- Water Use Equipment 1 Name
Schedule:Compact,
Sinks and Showers Temp Schedule, !- Name Any Number, !- Schedule Type Limits Name THROUGH: 12/31, !- Field 1 FOR: AllDays, !- Field 2 UNTIL: 24:00, 40.56; !- Field 4 with this input i think i used DHW , and also i put :
PlantEquipmentOperation:HeatingLoad,
DHW Control Scheme, !- Name 0, !- Load Range 1 Lower Limit {W} 90000, !- Load Range 1 Upper Limit {W} DHW Plant Equipment; !- Range 1 Equipment List Name PlantEquipmentOperation:HeatingLoad,
Central Boiler Only, !- Name 0, !- Load Range 1 Lower Limit {W} 90000, !- Load Range 1 Upper Limit {W} heating plant; !- Range 1 Equipment List Name Dr.Li can you say what does intermitent pump in energyplus?
the pump will run at its capacity if a load is sensed and will shut off if there is no load on loop ,
can you explain it please ?
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 7:09 PM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff That was because you were not using the DHW, and you have 1 mega watt of furnace power. The boiler furnace does not control the HW pump. Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Mon, 20 Feb 2012 13:47:43 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
it is my experiment data , and i have HW pump off and boiler on
but in my result energyplus i dont have this state , HW pump never off
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 4:38 PM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff All four states are on the spread sheet. Sorry. I means row 11 an row 12 of the spread sheet.. The year was 2010. Was it that long ago? Dr. Li
Boiler HW pump (Starting on row 9)
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Mon, 20 Feb 2012 00:41:02 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
excuse me i dont undrestand : on line 11 and 12 " what you mean ?
now in iran is 4:10 AM
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 4:06 AM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff On line 11 and 12. and more later on. Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Mon, 20 Feb 2012 00:32:04 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
Dr.Li sorry for my mistake i dont see the result of HW pump off and boiler on ,
i dont undrestand why , ?
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 3:55 AM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff This is why you must not change names and create different names of the objects. "HW pump" is not the same as "pump" to me. I do not associate 3 and 4 with the spread sheet as they are only for two other variables. HW pump on and boiler off is a valid state, because the pump is not controlled by the boiler. The pump is on the supply side water loop, the boiler fire is on the heating tank source side, and is not in the water loop. Your statement on EPlus is not correct. Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Sun, 19 Feb 2012 23:57:37 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx> Sent: Monday, February 20, 2012 3:14 AM Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff thanks for looking that
The data looked normal. You should have taken the temperature values at the same time. yes i take it but in the excel file that i send you there is nt,
You did not record the DHW pump on the spread sheet. i recorded DHW pump , but in this file that i send you it is only HW pump HW pump off, boiler off not listed below,
i wrote wrong in number 3, sorry , it must be HW pump off ,boiler off there is on the spread sheet.
in my energyplus result i dont see number 4 case (HW pump on and boiler off ) i dont undrestand why?
) Hw pump off but boiler on (DHW is being heated)
2)Hw pump on and boiler on (Normal )
3)HW pump 0ff but boiler on (HW below set point, DHW not in use)
4)HW pump on and boiler off (Tank is hot enough for a while) i dont this case result ( HW pump on and boiler off ) in my energyplus result ,
This is an indication that you did not plan the experiment well, and do not record the actual condition on site. Instead of 0 and 1's on the spread sheet, you should combined the states and then list the meaning of each state. Two pumps and a boiler fire should give you 8 states.
yes you are right i have 8 states, but in the excel file that i sent you , there is only the result of HW pump and boiler Some states may not be possible, and then your should try to explain them. Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx From: t.t111ir@xxxxxxxxx Date: Sun, 19 Feb 2012 21:58:35 +0000 Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff
please see the file that i attached :this is the real experiment data that i measured :
it shows some times all of below
1) Hw pump off but boiler on (DHW is being heated)
2)Hw pump on and boiler on (Normal )
3)pump 0ff but boiler on (HW below set point, DHW not in use)
4)pump on and boiler off (Tank is hot enough for a while)
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