Bureaucratic Affairs Building Hot Water System Logic Exercise Answers
The videos on this page are intended to supplement the answers provided for the Bureaucratic Affairs Building Heating Hot Water System Logic Exercise. More specifically, the answers to the exercise in the form of logic diagrams, a narrative sequence, and a point list have been provided previously. In the informal videos on this page, I walk you through the logic diagrams and explain how the logic works and also point you at resources that you might find useful to support your understanding of the exercise.
You should be able to download all of the videos if you prefer rather than watching them online.
You should be able to download all of the videos if you prefer rather than watching them online.
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In this first video, I provide an overview of the exercise and review where the resources you need to do it are located. It also includes an initial look at the revised logic that includes the reset schedule and a few other enhancements. |
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In the second video, I go over the basic enhancements that can be made to the way the heat exchanger is controlled, including using a reset schedule. The enhancements save energy, and in the case of the reset schedule improve comfort. And they will be relatively low cost/no cost improvements |
The reason they will be low cost/no cost is that they can be achieved simply by modifying the system programming. This assumes that there already is an outdoor air temperature sensor or that data can be procured from the system somehow. But even if that sensor needed to be added, the cost would be modest.
If the operating team (or you as the commissioning provider) were familiar with how to program the system, the cost of the making the change would be insignificant. But even if you needed to have a control technician make the change, the cost would be modest, especially if the Owner had a service agreement in place that covered making minor modifications to the software in the system.
But key to success would be your ability to communicate what needed to be changed. And logic diagrams are a powerful tool for accomplishing that.
If the operating team (or you as the commissioning provider) were familiar with how to program the system, the cost of the making the change would be insignificant. But even if you needed to have a control technician make the change, the cost would be modest, especially if the Owner had a service agreement in place that covered making minor modifications to the software in the system.
But key to success would be your ability to communicate what needed to be changed. And logic diagrams are a powerful tool for accomplishing that.
