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### How a Chiller, Cooling Tower and Air Handling Unit work together

How does a Chiller, Cooling Tower and Air Handling Unit work together to provide air conditioning (HVAC) to a building. In this article we...

### Centrifugal Pump Basics

Centrifugal pump basics. In this tutorial we're going to be looking at the centrifugal type pump. The centrifugal pump is the most...

### Pulley Belt Calculations

How to calculate pulley belt length and distance between wheels. In this article we're going to be looking at some pulley belt...

### Star Delta Starters Explained

Star Delta Starters. In this tutorial we're going to be discussing how Star-Delta starters work for 3 phase inductions motors. Then we'll...

### Intermediate Switch Lighting Circuits (EU/UK)

Intermediate switch lighting circuits. In this video weâ€™re going to be looking 4 different ways to control a light using 3 separate...

### Combine date and time cells in excel

You can easily combine date and time of two different cells in excel, all you have to do isÂ enter the following into the formula...

### How to combine multiple cells in excel

Combine two cells in excel with a space between.
You can easily combine two different cells in excel, all you need to do is enter...

### SI Units

The SI units of measurement are based on seven quantities, other commonly used quantities are derived from these.
SI Base units:
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### Volume of a sphere

The volume of a sphere can be calculated using the following formula
V = (4Ã·3) xÂ Î x r3
Where
V = Volume (m3)
Î = Pi (3.142 approx)
r...

### Water Cooled Chiller Design Data

Water cooled chiller design data. In this article we are going to be taking a very detailed look at the design data...

### How Plate Heat Exchangers Work

How plate heat exchangers work. In this video we're going to be looking at plate heat exchangers and how they work. They're...