A variable pitch balde in axial fan blower is used where precise control of static pressure within supply ducts is required. The fan wheel will spin at a constant RPM . The blades follow the control pitch hub. As the hub moves toward the rotor the blades increase their angle of attack and an increase [...]

Air cooled water chiller is type of chiller that removes heat from water or other cooling refrigerant by use of a refrigeration system that then dissipates that same heat into the air. The energy efficiency is given by the chiller COP.

The chillers basic operation principal is based on change state of a refrigerant gas which when forced through an [...]

The Secret by Rhonda Byrne, best selling inspiration book in Malaysia and the other part of the world.  I recently just bought the book after recommend by one of my schoolmate and finish read it within 2 days.
What The Secret talk about? Basically it talks about the Law of Attraction and how powerful it is. [...]