Lower power bills with a clean heat ex­changer

DEMM Engineering & Manufacturing - - PRODUCT WATCH - www.demm.co.nz/reader-en­quiry #141108

When we think of en­ergy ef­fi­ciency, we of­ten think of high en­ergy rat­ings on elec­tri­cal mo­tors, fuel ef­fi­cient en­gines or LED light­ing.

The truth is that ba­sic en­ergy sav­ing starts with a sim­ple spring clean­ing of our equip­ment.

We wouldn’t run our cars or trucks on half in­flated tyres, we don’t drive around with an en­gine need­ing a tune up. Why? Be­cause we know if our tyres need air they are go­ing to wear out early and will cost us more in fuel.

If our en­gine is out of tune it will at best be hugely in­ef­fi­cient to op­er­ate and at worst will soon break down. Why then would we not look at our heat trans­fer en­gine, your plate heat ex­changer, and give it a tune up?

Some­where in the plant room is a small un­ob­tru­sive block of sealed stain­less steel that we for­get is the main way you can ef­fi­ciently trans­fer heat­ing or cool­ing within your op­er­a­tion.

A blocked, or even par­tially-fouled heat ex­changer, can eas­ily rep­re­sent an ad­di­tional 10 to 15 per cent (or more) in­crease in your en­ergy con­sump­tion.

A hot wa­ter ex­changer that is fouled inside will re­quire your heat­ing boiler to op­er­ate at full fire con­tin­u­ously – just to achieve the wa­ter set point tem­per­a­ture.

It all hap­pens qui­etly inside the heat ex­changer and what you are sav­ing in a ser­vice call out cost, you are spend­ing two or three fold in your dis­crete en­ergy costs.

Check to see when your heat ex­changer was last cleaned and ser­viced. Your in­creased en­ergy bills could just sim­ply be an in­ef­fi­cient heat trans­fer is­sue that could be solved with a clean.

Sav­ing en­ergy could be only a clean away.

Above, a heat ex­changer pic­tured be­fore the clean­ing process, and be­low, after.

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