Adam Hilton's profile - activity

I don't have a solution, but I believe it stems from deleting an option and you had previously assigned in a design alte

E+ Surface Internal Source Location Temperature is much Higher than the source!!!!!! Hello everyone, I am modeling a sm

Yes you can, it has four nodes. Just drag it from the 'My Model' tab when you're adding it for the second time, not the

If you want to autosize, you'll have to add the WaterHeater:Sizing object as it looks like you've found. I'm not aware o

They have to be separate schedules. My recommendation would be to write a measure to generate setpoint and equipment av

Use ZoneHVAC:UnitHeater. If you don't want fan power just put '0' in for the fan pressure rise.

ResultsViewer is looking at a SQLite database found in the EP output folder, not a CSV file.

EP runs in SI, nothing you can do to change this. Pretty easy to post-process the data to get it into the units you'd li

Regulate the fan speed using variable volume terminals. There is a terminal AirTerminal:SingleDuct:VAV:NoReheat that wil

What's the EUI end-use breakout, is it the distribution you're expecting?

I'm not entirely sure without looking at your model. It would only add heat to the air stream if it would otherwise fall

Efficiency depends on the unit. I've seen them up to 18 SEER for heat pumps, which is quite good, I'm sure you could fin

If it can provide heating, then yes, if not then just model it as a packaged terminal device with a cooling coil and fan

'much higher' as it, 10%? 15% 20%? In the end, both are approximations, probably based of different sets of data.

Is the design flow rate what you're expecting? If it's variable volume, is it operating seasonally at the rates you expe

If you don't have it, can't you just delete the hot water coils and plant loop?

Trying to do radiant cooling in Houston is a questionable design decision in my opinion.You're going to be fighting with

$$H_{motor} = H_{tot}$$ $$H_{motor} = H_{fan} / \eta_{belt} / \eta_{motor}$$

$$H_{motor} = H_{tot}$$ $$H_motor = H_fan / \eta_{belt} / \eta_{motor}$$

$$H_motor = H_tot$$ $$H_motor = H_fan / \eta_{belt} / \eta_{motor}$$

$$H_motor = H_tot$$ $$H_motor = H_fan / \eta_belt / \eta_motor$$

From the engineering reference... $$Q_{toair} = H_{fan} + (H_{motor} - H_{fan}) * f_{motortoair}$$ While not discussed

From the engineering reference... $$Q_{toair} = H_{fan} + (H_{motor} - H_{fan}) * f_{motortoair}$$ While not discussed

@rraustad , updated answer with the two sets of coefficients and curves.

PTAC: Packaged Terminal Air Conditioner (Cooling Only) PTHP: Packaged Terminal Heat Pump (Heating and Cooling) Don't k

Ya, I really don't have any kind of feel for how much difference in consumption there would be. I think they took the co

Right. In OS, there are different curve coefficient defaults for the Coil:Cooling:DX:SingleSpeed in the PTHP versus the

Plenty of content already on the forum. Question 1 Question 2 Question 3

Plenty of content already on the forum. https://unmethours.com/question/13/how-do-you-model-operable-windows/ https://

No, a heat pump coil system in cooling is going to be driven by a difference performance curve than an ac coil system.

PTAC: Packaged Terminal Air Conditioner (Cooling Only) PTHP: Packaged Terminal Heat Pump (Heating and Cooling) Don't k

PTAC: Packaged Terminal Air Conditioner (Cooling Only) PTHP: Packaged Terminal Heat Pump (Heating and Cooling) Don't k

PTAC: Packaged Terminal Air Conditioning (Cooling Only) PTHP: Packaged Terminal Heat Pump (Heating and Cooling) Don't

If you're just modeling one space that's part of a larger building you should assign the walls that contact another spac

You sir are correct. There are a few lines such as #640 that get the model object as a Schedule:Ruleset...

defaultProfile = schedule.to_ScheduleRuleset.get.defaultDaySchedule

I'm trying to grab thermal zone supply terminals with the following code.

thermalZones = model.getThermalZones

thermalZones.each do |thermalZone|
    supplyTerminal = thermalZone.airLoopHVACTerminal
    runner.registerInfo("For '#{thermalZone.name}' the supply terminal '#{supplyTerminal}' was found.")
end

Running the previous results in the following.

It seems as though I'm not actually capturing the object because when I try to use supplyTerminal.name it returns undefined. I assume I'm just missing something rudimentary that should be blatantly obvious and after it's pointed out to me I'll have to hold my head in shame for the rest of the day.

Use ZoneMixing such that the apartments are receiving from the corridor. The flow is probably balanced by ex-filtration/bathroom exhaust so be sure to account for that such that your mass flow in equals your mass flow out. Look here for more information.

Ah, I see what you're trying to do now. The first thing that comes to mind is creating an internal load that's 100% radiant that you turn on and off or scale using EMS based on the the loop flow rate.

Just go to the material is the GUI and change it back to SpectralAverage. The reverse translator isn't fully featured and not a OS development priority.

Yes, it will be served by one plant loop.

Oh, you have a fireplace that creates hot water? If that's the case then all you care about is the radiant aspect so you just need to model radiant baseboards.

Fireplace: Use ZoneHVAC:HighTemperatureRadiant to model the fireplace, assuming it's gas fired. Hot Water Radiators: Use a PlantLoop with a Boiler:HotWater which serves either ZoneHVAC:Baseboard:RadiantConvective:Water or ZoneHVAC:Baseboad:Convective:Water depending on your situation.

Not sure what your trying to do wrt '...attribute boiler heat losses to a single zone'. The Boiler:HotWater assumes no losses to the space if that's what you're asking.

Yes it can. .

I had checked the Debug Plant Loop Bypass Fraction for a couple different control types and it was always 0. It actually looks like the the heating coils in AirTerminal:SingleDuct:ConstantVolume:Reheat are getting water flow through them. I checked the inlet water node to the coil and it's showing a non-zero value, but since the coil is scheduled off there is no heat transfer to the air. The water controller for these is part of the terminal, right? It seems as though the Controller:WaterCoils don't request flow when the coil isn't available, but the terminal does.

Thanks @aparker ! Unfortunately the Minimum Actuated Flow was already set to 0 and changing the Controller Convergence Tolerance to 0.0001 for all of them still yielded the same results. Something else potentially useful to point out is that the Coil:Heating:Waters all have an Availability Schedule assigned that has a value of 0 during the period of time shown above.