Computerized building energy simulation handbook by James P. Waltz

By James P. Waltz

This booklet offers functional, down-to-earth assurance of the non-software facets of utilizing automatic development strength simulation. whereas software program is the vital "tool" within the procedure, the concentration of this presentation is at the facts had to construct a version, how to construct a version, interpreting the consequences, diagnosing issues of a version, and calibrating them to fact. in case you have been annoyed attempting to construct devoted types of present constructions, or became skeptical of the efficacy of creating simulation - or are only attempting to do a greater activity simulating constructions - this e-book will provide you with welcome information.

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They are all amalgams of a year's worth of weather. So there is a lot of foolishness that goes on in this business that is presented as though it is precisionwhen in fact it is not (referred to by at least one of my colleagues as "precisely inaccurate"). If you are trying to model an existing building, you'll have a much better idea of what's going on in the building than when modeling a new building. New buildings are not hypothetical, they are going to be occupied. " Now you can do a realistic model of that building based on sage experience of real buildings.

So there's no money in residential. If you get into bigger buildings, (which is what we're going to be dealing with mostly in this book) we're talking about buildings that have high internal heat gains because they've got computers and lights and processes going on in them, and they probably have very sophisticated HVAC systems which basically can run amok and cause energy consumption to go through the roof. In buildings like that, the envelope is really almost unimportant. It is the rare larger building, where the envelope load is critical.

One building we encountered had an HVAC air-side system that was a combination of multi-zone, variable volume and high pressure inductionall in a single air handling system! Just try to look this one up in the user's manual for your simulation program and you can be sure it won't be there. So from my point of view, every program that's out there is flawed. There are no good programs. They're all terrible. At the same time, I think they're all great because I think you can do a good computer model with literally any piece of software that you use, if you understand the program, and if you understand the building and you critique the output.

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