Energy efficiency tip of the day (HVAC energy saving Low-cost opportunities)

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Energy efficiency tip of the day (HVAC energy saving Low-cost opportunities)

Background:

Low-cost opportunities are all around us. We want to look at things like blocking unneeded windows and insulating cold pipes and ducts. We should also consider implementing an energy management system. An energy management system that reduces temperatures and ventilation rates can yield big energy savings. But before we start, it’s important to know our HVAC load, because it varies between seasons. Implementing an energy management system can be as simple as installing programmable thermostats or as complex as installing digital controls. Involving all the related stakeholders in your facility to spot chances to reduce the energy used by your heating, ventilating and air-conditioning (HVAC) system will definitely be good for the environment and good for the bottom line $.

HVAC energy saving Low-cost opportunities

Check out your HVAC system. After you understand what kind it is, what it does and how it operates, you can identify where energy is wasted and where there are opportunities for greater efficiency. To conserve energy and cut costs, you can consider the following energy saving Low-cost opportunities:

  1. Reduce heat gain in air-conditioned spaces to decrease energy use:
    1. Improve building fabric (e.g. insulation, solar shading).
    2. Shield the building with trees (if possible).
    3. Reduce lighting use with upgrades.
    4. Consider increased use of natural light.
    5. Insulate hot surfaces.
    6. Isolate heat-generating equipment and provide local exhaust and make-up air.
    7. Block unneeded windows.
  2. Reduce heat loss to save energy and to improve working conditions and productivity:
    1. Improve building insulation.
    2. Insulate cold pipes, ducts and other conduits.
    3. Block unneeded windows.
    4. Upgrade windows and doors.
    5. Control air leaks from the facility.
  3. Add automatic control valves at unit heaters and fan-coil heaters to shut off the flow of water or steam when fans aren’t running.
  4. Consider installing variable-speed drives to a centrifugal chiller – savings of up to 40 percent versus a conventional chiller may be possible
  5. Reduce humidity requirements:
    1. Lower current humidity levels for human comfort and production requirements.
    2. Monitor and clean water used for humidifying.
  6. Use a high-pressure water atomizer instead of a compressed-air humidifier (atomizing pumps typically use much less energy than humidifying compressors).
  7. Implement an automated control system:
    1. For facilities that don’t operate all the time, an automated control system that reduces temperatures and ventilation rates can yield big energy savings. Implementing an automated control system can be as simple as installing programmable thermostats or as complex as installing digital controls.
    2. Use a sequence controller.

It’s easy to feel that we can’t make a difference for the environment. But we can. Some low-cost changes to our HVAC system can add up to big energy savings that help make our facilities greener place to work and save costs.

Energy efficiency tip of the day (HVAC energy saving Low-cost opportunities)

Energy efficiency tip of the day (HVAC energy saving Low-cost opportunities)

 

Magdy Aly

Energy manager, Energy efficiency consultant Passionate to help others to save Energy and Environment.

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