The different preferences of inhabitants often cause problems for the ventilation of flat buildings. Even the most carefully adjusted ventilation does not work correctly if some inhabitants block valves. This problem can be solved by means of frequency converter operated constant pressure regulators that can be used to enhance the standard of living and keep the ventilation in balance.
Constant pressure regulators allow constant air volumes in flats even when other inhabitants block valves in other flats. The amount of air stays stable and does not grow as in an unregulated situation.
Even a slight decrease of rotation speed of pump and fan drives results in significant savings of energy. Energy can be saved effectively and equipment wear can be decreased by adjusting the rotation speed by means of a frequency converter. This also saves money.
Other benefits of frequency converters include steady start-ups and stops. Starting up a drive can use even 7 times the power when started up to full speed. Using a frequency converter, this power can be controlled both as a financial expense and mechanical wear. All mechanical parts last noticeably longer when unnecessary twitch and impact loads to the system are avoided.
All Mitsubishi Electric frequency converters are easy to use and reliable. All frequency converters can be programmed and meet international requirements.
Savings from using a frequency converter with an air conditioner
- assumed pay-off time of the investment as electricity used by the drive
Calculation model from a Beijer Electronics site. The result is achieved using the Beijer Electronics formula with the following values:
|Nominal output of the drive||15 kW|
|Operating time per year||3600 h|
|Price of electricity||0,12 cent / kWh|
|RPM requirement / year||60%|
|Investment cost||€ 3,277|