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WATER HEATING THERMAL STORAGE


To increase the transfer of heat, this type


of store can utilise an external high efficiency plate heat exchanger (that will require an additional circulation pump). Separating the potable water from the


storage medium provides opportunities to use lower pressure vented thermal stores that will not fall under the auspices of the Pressure Systems Safety Regulations. The flow through the primary coils –


Figure 2: An unvented twin coil hot water cylinder designed for solar thermal (bottom coil) and traditional heat source (top coil) (Source: Kingspan)


and so the charging of the store – can be successfully controlled by an integrated multivalent controller that will optimise the flows from heat sources, attempting to make maximum use of the lowest cost (and lowest carbon) source. In many cases the most beneficial heat source is likely to be solar thermal collectors. So, for example, in such an application


the temperature is compared in the solar collectors to that in the base of the thermal


Cleaner Value


Greener


EcoShieldª - gas fired Condensing Water Heaters.


¥ Up to 2436 litres/hour hot water recovery ¥ 5:1 burner modulation ¥ Multiple flue options


¥ 5-year warranty on Storage vessel


We also offer great value Condensing Boilers and bespoke Renewable packages.


For details, call us on


+ 44 (0)1295 269981 email sales@lochinvar.ltd.uk or visit


www.lochinvar.ltd.uk


Lochinvar Ltd 7 Lombard Way The MXL Centre Banbury Oxon OX16 4TJ www.cibsejournal.com


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