Maximum Demand for Buildings 

By on

CrystalBall
Vanitas with a Crystal Ball
Vincent Laurensz van der Vinne
(1628 – 1702)
Estimating maximum demand is a topic frequently discussed. Working out how much power to allow for a building can be very subjective . Allowing too much power results in additional equipment, increased space requirements, greater system losses and extra cost. On the other side, not enough power results in operational problems. Trying to find the right amount of power is like gazing into a crystal ball and everyone will see something different.

Early in a project power demand is estimated on a w/m2 basis. Each building needs to be considered on it merits and appropriate allowances worked out (for example a office designed for high end banking clients will require more power than a general purpose office).

While there are no fixed guidelines it is good to have some sort of starting point. The table below provides an initial set of demand figures to start playing with. Hopefully it may help someone or at least give some food for thought.

 


In this short introductory book, Estimating Power Demand in Buildings, Steven McFadyen provides a simple and clear understanding of the process by covering power theory and well- established procedures.

The book is available in paperback and eBook format at all Amazon stores. 

Table of Contents
The Need to Estimate Electrical Demand
Electrical Power Theory
Estimating Power Demand
Spreadsheet
Electrical Power Energy Targets — An Alternative Method
Energy Demand
Appendix - Typical Demand Figures (W/m2)   



spreadsheet

We've produced an Excel spreadsheet for estimating building total connected load and maximum demand.

If your interested in obtaining a copy, you can get it here.  Alternatively it is available free of charge with the purchse of the book "Estimating Electrical Power Demand In Buildings".



Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author

myElectrical Engineering

comments powered by Disqus

  1. ram31's avatar ram31 says:
    7/13/2013 1:12 PM

    Does the word " Power " in above table includes Air condiitoning loads(FCUs,Dampers etc)?Please enlighten.


Comments are closed for this post:
  • have a question or need help, please use our Questions Section
  • spotted an error or have additional info that you think should be in this post, feel free to Contact Us



Wiki Depreciation

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

Back to Basics - Ohm’s Law

Electrical engineering has a multitude of laws and theorems. It is fair to say the Ohm's Law is one of the more widely known; it not the most known. Developed...

Electromechanical Relays

Electromechanical relays have been the traditional backbone of electrical protection systems.  While over recent years these have been replaced by microprocessor...

Inductance

When current flows within a wire, a magnetic field is created. The potion of this magnetic field perpendicular to the wire is called the magnetic flux...

A mechanical engineering paper, some history and memories

I was digging in my bookshelf and came across the 80th Anniversary Association of Mine Resident Engineers, Papers and Discussions Commemorative Edition...

UPS Battery Sizing

Various techniques exist to enable the correct selection of batteries for UPS applications.  The procedure described below is one of the more common. ...

Introduction to Traction Substations

Following on from my post on railway electrification voltages, I thought an introduction to traction substations would be a good idea. Traction substations...

Magicians of Engineering

The other day I was reading 'Night of the New Magicians' by Mary Pope Osborn with my son.  The story is about a young boy and girl who travel back in time...

What is an Open Delta Transformer

In three phase systems, the use of transformers with three windings (or legs) per side is common.  These three windings are often connected in delta or...

Surface Treatment – Ladders, Trays and Baskets

Steel ladders, trays and baskets form the backbone of cable containment systems. Often these items need some form of surface treatment to prevent corrosion...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note