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



Fire Resistant and Fire Retardant Cables

Fire resistant and fire retardant cable sheaths are design to resist combustion and limit the propagation of flames. Low smokes cables have a sheath designed...

Welcome back Bottle

‘Kept looking at a card, y’see? Kept looking at it. Welcome back Bottle. Gods below welcome home. The Crippled God A Tale of the Malazan Book of the...

IEC 61439 - The Switchgear Standard

The new standard IEC 61439 replaces the old 60439. Compared to the old standard, the new 61439 is a more clearly defined and takes into account the assembly...

Electromechanical Relays

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  While over recent years these have been replaced by microprocessor...

Equipment Verification (to IEC Standards)

One of the requirements to ensuring that everything works is to have equipment selected, manufactured and verified [tested] to IEC standards. Not all equipment...

Thomas Edison

American inventor Thomas Alva Edison was born in Milan, Ohio on February 11, 1847. He was the youngest of seven children and received little formal schooling...

Getting Started with Patents

If you have a great idea or invent something the last thing you want is someone to steal the idea. One of the things you can do is protect the intellectual...

Voltage Drop in Installations - Concepts

Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...

Switchboard - Forms of Internal Separation

IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The...

myElectrical - Cable Sizing Tool Upgrade

Our IEE cable sizing was wrote a few years ago and had become rough around the edges. I thought it was time to give the tool a service. Unfortunately when...

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