OpenStudio - EEMs 1: DCV Measure

In the previous episode (https://youtu.be/tTvxbkNG7AI), we discussed how to simulate Demand Controlled Ventilation (DCV). In this episode, we discuss how to quickly implement DCV across your entire model using the Building Component Library (BCL) measure "Enable Demand Controlled Ventilation". The measure can be downloaded through OpenStudio or can be downloaded directly from the BCL here: https://bcl.nrel.gov/content/3ff4b412-8689-4b11-a588-935c621dc97d Transcript: Hi all we are back with an another episode. In our previous episode we talked about how to implement demand controlled ventilation (DCV). In this episode we are going to demonstrate an OpenStudio measure that will do all of that work for you. We have got an office building/storage building. This building has several different Air Loops in it; each with outside air systems. In the previous episode um we talked about implementing demand controled ventilation using the toggle button...here. In this episode we are going to use one of the measures from the Building Component Library (BCL). Go up to components and measures, go to find measures. This can be found in the HVAC category under ventilation. It is going to be this one here "enable demand controlled ventilation". Check it and then click the download button. That will download it to your computer. Alternatively, you could go to the BCL website: bcl.nrel.gov. Search for "demand". Scroll down...it is going to be this one right here. You can click it and it will give you a description of the measure. It will also give you any things to note when implementing the measure. Now that we have downloaded the measure to our project, we can go to the Measures Tab. Let us save this as another project. Go to HVAC, ventilation, drag in the "enable demand control ventilation" measure here. By doing this it is going to keep our model the same. The measure will be implemented for this one run. We can always go back and delete this later on if we want to keep our model unchanged. Alternatively, you can go up to components and measures and apply the measure now. That will apply it to your model and it will physically alter your model; there is no way of going back. By dragging it in here, we can run the simulation see how it turns out. If we do not like it, we can go back and delete this and it will not have changed our model. Go to the inputs. We will select "enable dcv". Go ahead and run the model... OKAY. The model has run successfully. One thing I should note; if we scroll back up here... It will talk about implementing that measure. You will see it right here. Enabling dcv for fc-9, fc-5, etc. All of our Air Loops that had outside air systems. They had demand controlled ventilation enabled. It will give you a summary. It was enabled for 11 Air Loops. Let us take a look at the before model and the after model. Go to the reports folder...actually we could just...yeah...we will go to the reports folder. This is our Baseline model...this is our model with DCV. We can see that this is after and this is before. We are saving energy. Just how much energy this would be we can calculate: 1,188,506 - 941,274 = 247,232 KBtu (~261,000 MJ) savings per year. If we use a, roughly, blended rate of 2 cents per KBtu...we are saving pretty close to $5,000 USD. Just for implementing DCV in our building. So, that is how you quickly implement demand controlled ventilation across your entire model without going to the individual air loops and and toggling controls. Thank you! Please like and subscribe.