Sizing Closed Water Systems
Where capacities are not given for heating systems, allow eleven litres of capacity for every KW of boiler output (or 10,000 gallons for every 1.5 million BTU). These systems should be protected from corrosion and scale by the addition or Nitrite, Molybdate or Tannin inhibitors.
NB: Where boiler is providing heating for hot water as well, subtract this load from the calculation.
Chilled water system pipes are about 40% bigger than the same heating pipework and this can be used to estimate the capacity IF the pipework goes to the same locations (it may not). Chiller systems may operate below 0oC and should be prevented from freezing by the addition of glycol or other antifreeze solutions.
Estimating water loses and ongoing Dosage Rates
Each individual system will lose water at differing rates depending upon leaks. The losses from a small (<5000L) new system will be minimal, whereas a large, old system may lose 1% of its volume or more every week.
Free Feedwater Consultation
If you are looking for expert advise for protecting your critical assets such as your heating or chilled closed systems please speak to us today to arrange a free visit by one of our local consultants.
Feedwater are also the manufacturers of closed system inhibitors for scale, corrosion and bacterial growth prevention. Some of our products are displayed below and available for order from our website.
Chemical & Water Chemistry Testing of Closed Systems
Feedwater offer a complete closed system chemistry analysis which covers:
- M. Alkalinity
- Glycol % (if type known)
(Ammonia by request)
The analysis can help you to identify what inhibitor you are using, what the levels are and the condition of the system.
You can also test for yourself using our comparator kits or dropper titrants, to perform the whole range of test advised for a closed system please see our test kit category in our web shop.