Solar
hot water cylinders
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Cylinders for use with heat pump or solar heat source
SunSpeed domestic hot water cylinders are designed for use
with heat pumps or solar panels. The heat exchangers are designed
for this purpose because: -
(a) The primary flow temperature from these sources will
normally be significantly lower than from conventional heat sources e.g. gas
boilers. Therefore heat exchangers with large surfaces areas will be
necessary to transfer the heat at low temperature differences. (b) A second
heat exchanger for conventional heat sources e.g. gas boilers will often be
required. In this case the heat pump/solar panel heat exchanger must be of a
compact design and capable of being fitted very low down in the cylinder.
Solar Heat exchanger specification
The heat exchanger in a SunSpeed cylinder designed for
either SOLAR or HEAT PUMP is manufactured from ‘Integron’ finned
copper tube and is only suitable for pumped circuits. In a SunSpeed 2, the
heat boiler heat exchanger i.e. coil for use with a conventional heat source is
manufactured in either 22mm or 28mm plain copper tube to meet the
requirements of BS1566 and Part L of the Building Regulations.
Sunspeed Solar high performance hot water cylinder
The ‘SunSpeed’ heat exchanger is designed to heat the
cylinder water content from 10˚C to 49˚C in one hour with a constant primary
flow temperature of 55˚C. The heat exchanger for use with conventional heat
sources (e.g. a gas boiler) in SunSpeed 2 is rated to give the recovery time
under 30 minutes as specified in BS1566. When a heat pump is operated during
“off peak” electricity supply times only, then the heat exchanger rating
should be matched to the heat pump output. For example a 450 litre cylinder
may be designed to be heated by 7.5kW heat pump operating during off peak
times only; the designer would specify the storage required with SUN 28 heat
exchanger.
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