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



Cost Performance and Time

Often us engineers get so bogged down in equations, using software, producing drawings and writing specifications that this becomes the sole focus.   ...

Maxwell's Equations - Gauss's Electric Field Law

Gauss's Electrical law defines the relation between charge ("Positive" & "Negative") and electric field.  The law was initially formulated by Carl Friedrich...

Photovoltaic (PV) Panel - Performance Modelling

In an earlier note on the site [Photovoltaic (PV) - Electrical Calculations], the theory of solar (PV) cell calculations was introduced.  In particular...

Always Use PPE

A lot of our members work in countries where PPE (personal protective equipment) is regulated or they work for companies/organizations which take employee...

Bows and Arrows

It starts with me reading one of the Horrible History books with my son (Groovy Greeks). Arrows were mentioned which lead to the discussion of the bodkin...

Understanding Circuit Breaker Markings

IEC 60947 is the circuit breaker standard and covers the marking of breakers in detail. Any manufacturer following this standard should comply with the...

Tip – Latitude and Longitude on Large Scale Plans

If you are working on a large plan, get the real coordinates [latitude, longitude] for two or more points and add them to the drawing. That way you can...

Autonomous Vehicle Challenge

Two driverless and solar power vans have departed from Italy on their way to China via the silk road. During the 13,000 kM trip the vans will drive themselves...

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...

Closed Doors

"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong...

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