By Steve Doty

This sensible reference serves as a entire source for appearing strength audits in advertisement amenities. The ebook starts off by means of explaining that once advertisement amenities are subdivided into different types in response to enterprise sort, many beneficial styles might be pointed out which are acceptable to the functionality of an efficient power audit. It discusses methods and directions for a variety of enterprise and construction forms, comparable to colleges, eating places, scientific amenities, grocery shops, laboratories, workplace structures, non secular amenities, libraries, and warehouses. The booklet additionally covers development strength audit and evaluate, together with construction envelope, lighting fixtures, HVAC, controls, warmth restoration, thermal garage, electric platforms and utilities.

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Figure 1-2. Typical EUI Benchmarking for an Office Building Chapter 2 Analyzing Energy Use Graphs GENERAL Energy use profiles, by month, are very useful in most cases, especially when patterns or abnormalities suggest issues and possible energy saving opportunities. Studying these is a good initial step. Graphing is also very effective for presenting complex information to customers. Finally, graphing is an excellent tool for displaying the results of changes made— before and after. Graphing with two vertical axes can be insightful for things happening concurrently.

Electric heat and electric cooling produce two characteristic ‘humps’. The size of the two humps depends on the relative severity of the seasons, but all things equal the cooling hump will be smaller since the COP>1 and COP=1 for electric resistance heat. Figure 2-3c. Figure 2-3d. Weather independent example. A common conclusion from weather independence is that energy use is driven by process and improvements related to envelope may be trivial. Chapter II—Analyzing Energy Use Graphs 17 18 Commercial Energy Auditing Reference Handbook LOAD FACTOR The example graph shows the mirror image effect of poor load factor on electric cost.

It is derived from the total consumed energy per year, divided by the square foot area of the building. It represents how concentrated the energy use is within the building. Buildings with high EUI also tend to be self heating. A variety of EUI data is provided in the Appendix. LIMITATIONS OF EUI EUI is a simple measure, with limitations. For example, using the standard metric of floor area (square feet), the building volume is not considered. A warehouse with high stacked storage and high ceilings will have increased energy use through envelope heat loss/heat gain compared to shorter warehouse building with less wall area.

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Commercial energy auditing reference handbook by Steve Doty
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