Building Control
Fire Safety
Your friend in indoor comfort & safety systems
Home Company Services Case Studies References Agencies Daikin-Vrv Handbook Fires / Hotels Links Save Energy Contact Us
Eco Homes

Solar Water Heeating

Solar Electric Systems
Wind Turbines
Passive Solar Heating
Passive Solar Cooling
Water Conservation
Building Material
Ground Source Heat Pumps
Eco Cases
Save Energy
Solar Water Heating
Solar Electric Systems
Wind Turbines
Passive Solar Heating
Passive Solar Cooling
Building Material
Water Conservation
Ground Source Heat-Pumps
Green Hotels

Glass &Windows Selection

Standalone Systems
Grid Connected Systems
Hybrid Systems
Back-up Systems
Solar Cells
Solar Arrays
Change Controller
Direct Systems
Indirect Systems
Draindown Systems
Pool Heating Systems
Hybrid Systems
Grid Systems
Water Pumping
Using Wind Energy
Enviromental Aspects
Buyer's Guide
Solar Collectors
Flat Plate Collectors
Evacuated Tube Collectors
Concentrating Collectors
Transpired Collectors
Solar Control Systems
Big Hotel Fires
Hotel Fire Cases
Fire Hazard Classification
Hotel Sprinkler Systems

Hotel Fire News

Ask The HvacMan
Air Handling Units
Cooling Towers
Heat Recovery

Steam Generation

Motor & Drives

Motors are used to run HVAC systems, elevators and other equipment, and can account for up to 50 percent of your facility's overall energy use. Over a typical 10-year operating life, a motor can consume electricity valued at 50 times the original cost of the equipment. Using this calculation, a $1,000 motor running continuously for a decade could cost you up to $50,000 in electricity.

  • Energy-efficient motors are good investments. Even if they yield only 2 to 8 percent in energy savings, these motors generally achieve incremental paybacks in 2.5 to 5.0 years compared with buying less-efficient replacement motors.

  • Adjustable-speed drives (ASDs) - sometimes referred to as variable-speed drives (VSDs) and variable-frequency drives (VFDs) - regulate motor speeds according to the amount of work required. Reducing motor speed by 10 percent can cut power consumption by 27 percent, and a 20 percent speed reduction can cut consumption by 49 percent. These drives are particularly useful when combined with high-efficiency motors since they tend to run faster than conventional motors. An added benefit is their ability to reduce noise - an important consideration near guest rooms and small meeting rooms. These drives can save on your facility's total energy consumption, but tend to be expensive, with approximate paybacks between two and eight years.

The Vocabulary of Motors

Motors are classified as AC (alternating current from outlets), DC (direct current, usually from a battery) or universal (operating as either AC or DC). A motor's mechanical power is measured in either kilowatts or horsepower (1 hp = 0.746 kW). The two factors that determine power are torque (measured in newton metres or pound feet) and speed (measured in revolutions per minute [rpm]). The slower a motor operates, the more torque it must produce to deliver the same amount of power. A motor's efficiency is a measure of the energy it delivers (output) relative to the energy it uses (input).

  • Power-factor correction capacitors are devices that store electrical charges and reduce the consumption of reactive power that motors need to generate magnetic fields. These are important only if you have demand charges on your electricity bills

  • Energy-efficient drive belts have teeth or longitudinal grooves that improve grip, reduce slippage and are only slightly more expensive than standard V-belts. Ensure that drive-belt inspections are performed every few months as part of regular maintenance, and replace the belts when they wear out.

  • Choose the right motor for the job. Oversizing is the inefficient practice of employing a larger motor than required for a task. This is a particular concern if the motor is loaded under 50 percen


Web www.iklim.com
  Discuss on the Message Board
Book & Magazine
Interstate Bank Fire
Beverly Hills Club Fire
MGM Fire
Firehause Magazine
Special Fires
Hotel Fires
Ship Fires
Industrial Fires
Warehouse Fires

Restaurant/Nightclub Discotheque-Fires

High Rise Fires
Fires ABC
Big Building Fires
Book About Fires
Fire Stats
Fire Board

Books About Fires

Energy Save
Hotels & Legionella
Green Hotels
Hotel Design Books
Control Software