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2 3+Load+Estimation+Methods

The document discusses various methods for load estimation in electrical design, including the Building Area Method and Load Breakdown Method. It highlights the importance of different area concepts such as plot area, footprint area, and built-up area, as well as specific kVA requirements for different types of buildings. Additionally, it mentions the Exact Method, which relies on historical project data for accurate load estimation.

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Sachin Kharat
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292 views19 pages

2 3+Load+Estimation+Methods

The document discusses various methods for load estimation in electrical design, including the Building Area Method and Load Breakdown Method. It highlights the importance of different area concepts such as plot area, footprint area, and built-up area, as well as specific kVA requirements for different types of buildings. Additionally, it mentions the Exact Method, which relies on historical project data for accurate load estimation.

Uploaded by

Sachin Kharat
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Load Estimation

Different Methods
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Area Concept
 Plot area: It is the area of ​the entire project plot of land, and it includes built-up and unbuilt-up areas such as garages and
gardens.
 Footprint area: The area used for construction is only part of the project plot
 Built-up area: It is equal to the ground floor area (footprint area) + area of all the floors.
Overall Method VA/𝒎𝟐 = Building Area Method
 According to the electricity company regulations:
 Luxury housing or real estate = 6 kVA for each 100 𝑚2 .
 Affordable housing or real estate = 4 kVA for each 100 𝑚2 .
 Commercial and administration buildings = 10 kVA for each 100 𝑚2 .
 Take a diversity factor of 0.8 at transformers, pillars, and substations.
Overall Method VA/𝒎𝟐 (Saudi Arabia Code)
District Cooling
 A district cooling system (DCS) distributes cooling capacity in the form of chilled water or other medium from a central
source to multiple buildings through a network of underground pipes.
Overall Method VA/𝒎𝟐 (Saudi Arabia Code)
Overall Method VA/𝒎𝟐 (Saudi Arabia Code)
Load Breakdown Method
 This method is used to provide more accuracy in load estimation dividing it into lighting, power sockets, HVAC, etc.
 Sometimes, we estimate the electrical parts like lighting and sockets, then look at the load estimation for the mechanical
sector like HVAC and take the estimated number from him.
 The figure shows the breakdown of loads based on type.
 Another breakdown is to do the load estimation based on the type of application in each space, for example, basement,
residential floor, clinic floor, etc.
Load Breakdown Method – IEEE - Lighting
 As you can notice as the space of the building increases, there will be more corridors, pantries, and toilets which will
lead to less requirement of luminaries compared to small buildings.
Load Breakdown Method – IEEE – Sockets and Occupancy
Load Breakdown Method – IEEE
Load Breakdown Method – IEEE
Load Breakdown Method – IEEE
Load Breakdown Method – IEEE
Load Estimation – IEC
Load Estimation – IEC
Load Estimation – NEC
Exact Method
 We look at the previously created projects that we have already done in our company.
 Based on these projects, we can estimate how much VA is required in a hospital or hotel or any other projects.
 This is the most accurate method but needs to have a large database of previous projects with their characteristics.
 Another way is to go to the electricity company related to your area and ask them for load estimation numbers for a building
like the one you are constructing.

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