With the rising cost of energy, the use of
variable frequency drives (VFDs) is growing at an increasing rate. By
optimizing the frequency of a three-phase alternating-current (AC)
induction motor's voltage supply, a VFD controls the motor's speed and
torque while providing energy savings. And, these energy savings can be
quite substantial - 20% or more - making VFDs a "green" solution as
well as a wise money-saving investment.
Steam load management is often neglected during
the design phase of a steam delivery system. As a result, in the case
of a boiler that serves steam-using equipment that cycles like an
autoclave or sterilizer, steam quality and quantity at start up may
suffer significantly. Understanding the significance of the events
inside and outside the boiler pressure vessel during a rapid steam load
demand period and choosing the correct design enhancements will reduce
the consequences of rapid depressurization.
A hybrid boiler plant is defined as a hydronic
heating plant combining condensing and noncondensing boilers. This
system is designed to take advantage of the best properties of both
boilers. Through the proper design and selection, 100% of the potential
energy savings can be realized with a possible installed cost savings
of one third to one half of the cost compared to an all condensing
Regularly changing filters may not be high on
your agenda. But when you look at how much intentionally or
unintentionally delaying filter maintenance is costing you in terms of
increased energy use, it suddenly becomes much more important.
It’s out there. The need to create more environmentally conscious, sustainable buildings isno longer a noble desire, but a dire necessity. Within this historical and industrial context, it hasnever been more important to precisely understand the progressive process of designing forsustainability and energy effi ciency.
In order for the electrical power distribution systems within data
centers and related facilities to operate properly as designed and
intended, it is extremely important that care be given to the
commissioning and startup of the electrical equipment via effective and
reliable methods. This paper describes the need for a systematized
program for new power equipment startup and the best practices and
pitfalls that exist with regards to power equipment startup. This paper
will also provide an overview of important items and issues that should
be focused upon as part of reliable power equipment start up procedures
As computer manufacturers pack more and more processing power into smaller packages, the challenge of data center cooling becomes more complex - and more critical. New servers and communication switches generate as much as ten times the heat per square foot as systems manufactured just ten years ago.. As these new systems are installed alongside previous generation systems, they create hot zones within the data center that cannot be effectively managed using traditional approaches to cooling. New strategies and technologies must be implemented to provide the cooling high-density systems require for reliable operation.
Foods companies all over the country are using thousands of gallons of DOWFROST™ Heat Transfer Fluid from The Dow Chemical Company to manage heating and cooling during the incredibly heat and cold sensitive chocolate manufacturing process.
It's important to remember that Standard 15 applies to more than large chillers. In this Newsletter, the requirements of Standard 15 are exsamined as they apply to smaller refrigeration systems - specifically, packaged units, split systems, and the newer variable refrigerant flow (VRF) systems.