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Power Factor Controllers |
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 Mar 27 2008, 05:44 AM
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#61
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Junior Member  Group: Members Posts: 2 Joined: 27-March 08 Member No.: 4,423  |
Hi members,
I am new to the forum and I have read all of your quotes which is also a big help as an additional knowledge. I am working as an electrical designer at GEA Grasso Philippines Inc. a contractor and manufacturer of Industrial Refrigeration and our main office is GEA Grasso International at The Netherlands. Much has been said and comments from the article of Mark. GEA Grasso line of business consist of majorities of motors. Majority of Operating Cost for Refrigeration plants come from power consumption. If it is true that energy savings are more or less not apllicable. WHAT then is the best way we could suggest to our costumer if they are asking for help in order to REDUCE there POWER BILLS. To be honest for every project we built, costumer are always begging for help to cut Energy cost. Or during the feasibility study we would immediate suggest to install 1. Power factor correction. - to reduce energy lost 2. Use Softstarter and Variable frequency drives - to prevent high starting current. 3. Good maintenance of the motor to become efficient. 4. Or install energize saving device you trust and has been tested. What would you suggest Mark. |
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Dec 26 2008, 10:01 PM
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#62
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Junior Member Group: Members Posts: 3 Joined: 25-December 08 Member No.: 5,042 |
Hi Mark,
Great thread. Back to the original discussion from many moons ago... Have you ever proved or disproved Siena's technology? You had mentioned that you had several private converstaion on this topic. I was hoping to learn more of that. This is quite an old topic, but the underlying desire to save power is all the same. We are analyzing the entire process to have it optimized, and have fat cut out. Additional to that, I'd like to see what these "magic boxes" are all about. Did Siena ever send you their website? Thanks! Michael |
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Dec 27 2008, 03:58 AM
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#63
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Posting Freak Group: Moderator Posts: 2,336 Joined: 24-April 02 From: Christchurch, New Zealand Member No.: 1 |
Hi Mikie
The product being offered by Sienna was the Somar PowerBoss and there are a number of threads about this type of product. The concept is based on an initial patent by Frank Nola of NASA back in the 1970s where the iron loss in the motor was reduced by reducing the voltage applied to the motor. The algorithm proposed by Frank Nola was to monitor the power factor of the motor and if the power factor was low, reduce the voltage to maximize the power factor. The effect of this is to minimize the magnetizing current and therefore minimize the iron loss. On small single phase inefficient motors, this principle works well, but on larger three phase motors, the iron loss is already very small and any reduction is insignificant. Additionally, the principle only really works when the load current is less than or equal to the magnetizing current. Have a look at the efficiency of modern motors. In many cases there is very little improvement possible. Have a look at http://www.LMPhotonics.com/energy.htm Best regards, Mark. -------------------- Mark Empson administrator
Skype Contact = markempson | phone +64 274 363 067 LMPForum | LMP Tech Warehouse | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Mark Empson Website |
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