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I wanted to double check whether it is necessary to add the thermal capacitance of the building structure to the air node or TRNSYS automatically takes into account since we are choosing the structural components. I am specifically wondering whether I should lump the my concrete floor capacitance to the air node. Thanks for your kind response.
A_Weiss 16/05/2023 12:56 pm
@tm-abir-ahsan If your concrete floor is a massive surface (which it should be by default), then no, you do not need to add the concrete floor capacitance to the air node. However, you probably have some furnishings or other objects in your zone which *should* be added to the air node. We usually multiply the default capacitance of the air node by about 5-10x to account for all of the other objects that typically occupy a space.
@A_Weiss: Thanks for answering this question. I just copied your recommendation as an "answer" to the question. 😉
If your concrete floor is a massive surface (which it should be by default), then no, you do not need to add the concrete floor capacitance to the air node. However, you probably have some furnishings or other objects in your zone which *should* be added to the air node. We usually multiply the default capacitance of the air node by about 5-10x to account for all of the other objects that typically occupy a space.
marion
