System Description; Introduction - Benchmark mCHP BoilerMate Design, Installation And Servicing Instructions

2.0 SYSTEM DESCRIPTION

Figure 2.1 mCHP BoilerMate
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NOT YET AVAILABLE
Figure 2.2 mCHP BoilerMate
Supplied By www.heating spares.co Tel. 0161 620 6677
A-CLASS
A-CLASS

2.1 INTRODUCTION

The mCHP BoilerMate A-CLASS appliances shown
in figures 2.1 and 2.2 are designed to provide
improved space heating and mains pressure
hot water and better electric and heat energy
management when coupled to a domestic
Micro Combined Heat and Power (mCHP)
appliance. Any automatic mCHP unit designed
to operate at flow temperature between 75
and 85 o C can be linked to any model of mCHP
BoilerMate . All models are fitted with
A-CLASS
electric central heating and hot water backup
and boost facility.
The principal of a mCHP BoilerMate
to separate the heat generator e.g. mCHP
appliance from the fluctuating space heating
and domestic hot water demands by means of
a thermal energy store. The main advantages
and features of this arrangement are: -
• That the hot water can be supplied directly
from the mains at conventional flow rates
without the need for temperature and
pressure relief safety valves or expansion
vessels. This is achieved by passing the
mains water through a plate heat exchanger.
The outlet temperature of the domestic
hot water is maintained by the system
controller at about 55 o C by regulating the
speed of the pump circulating the primary
water from the store through the plate heat
exchanger.
• It evens out the fluctuating and intermittent
demands for space heating and hot water
and enables the system to meet very high
peak heat energy demands well above the
thermal rating of the mCHP appliance.
• By storing heat energy produced when
demand is low and discharging it when the
demand is high (i.e. during dwelling warm
up phase or when hot water is drawn off ),
a smaller heat generator can potentially be
used.
• The use of a thermal store will also increase
the mCHP continuous run times by virtually
eliminating short cycles and thereby
improve the reliability and utilisation
efficiency of the mCHP appliance.
• The thermal store can accept energy from
other source e.g. solar, electric heater and
this can then be used for both space heating
and domestic hot water.
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A-CLASS