A guide to low temperature systems

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MYSON
MYSON
MYSON Eastern Avenue, Team Valley, Gateshead, Tyne & Wear NE11 0PG
T: 0845 402 3434, F: 0191 491 7568, [email protected], www.myson.co.uk
The Essential Guide to Panel Radiators with Low Temperature Heating Systems
heatingthroughinnovation.
www.myson.co.uk
heatingthroughinnovation.
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More Innovation
More Efficiency
Currently in the UK, we still use large amounts of energy to heat our buildings.
The power we collectively use for heating accounts for over 10% of our national
CO² emissions.
In today’s world of rising fuel prices and growing
environmental concerns, high energy usage has become a
problem that urgently needs to be addressed. Whilst
providing indoor comfort remains the key objective for
heating companies, the big industry challenge is how
to achieve this aim in a more energy efficient and cost
effective way.
Continuous innovation is the key to meeting this challenge.
This is why we have recently seen the introduction and
growth of high efficiency, low temperature heating systems.
Existing products, such as panel radiators, have also been
significantly improved by the addition of new, energy
efficient heating technology.
This booklet has been created specifically to help
people in the heating industry better understand how
modern panel radiators have evolved and explain how
they work just as efficiently with new, low temperature
heating systems as they do with traditional high
temperature systems.
SELECT Compact
Type 11
70°C
SELECT Compact
Type 33
MEAN RADIATOR
TEMPERATURE
70°C
60°C
50°C
70°C
80°C
= 600 W
@ ΔT50°C
60°C
50°C
80°C
= 600 W
@ ΔT25°C
45°C
40°C
20°C
MEAN RADIATOR
TEMPERATURE
40°C
20°C
30°C
30°C
Based on a room temperature of 20°C
Based on a room temperature of 20°C
Designing a Modern Heating Solution
MYSON is part of a Finnish, family owned company called
Rettig ICC (Indoor Climate Comfort). Rettig ICC has
factories and sales operations in all major European
markets, China and the USA and has annual sales of over
EUR500 million.
As part of Europe’s leading radiator, controls and
underfloor heating company, MYSON has made a major
commitment to helping reduce CO2 emissions by
continually developing new and innovative products that
are capable of operating more efficiently and more
effectively at lower flow temperatures.
To help communicate this highly important commitment,
MYSON have introduced our own distinctive Eco logo.
This now features on all our products that are compatible
with renewable energy sources. It is our guarantee to you
of economically and ecologically efficient heating
performance.
The full range of MYSON panel radiators proudly carries
this seal of quality, guaranteeing their compatibility with all
energy sources and their ability to generate significant
savings on heating costs and reductions in CO2 emissions.
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Four Steps
to Energy
Efficiency
While developing new technology and
launching new products are vital parts of the
drive to save heating energy, at MYSON, we
believe that the best results can only be
achieved by following a ‘four step’ approach to
heating systems.
Step
1
Step
2
Step
3
Step
4
STEP 1 Insulation Check
STEP 3 Heat Source Choice
The first step to achieving energy efficiency, especially in
older buildings, is to minimise heat losses. If a building does
not meet modern insulation standards its heating system
will never be truly energy efficient. Lower heat losses lead
to lower heat demand and lower energy usage.
In recent times, gas boilers have overwhelmingly been the
UK’s most popular choice for generating heat in buildings.
Today, however, the list of options is growing fast with
renewable technologies such as heat pumps, becoming
more popular. Whilst upfront capital costs are higher, these
low water temperature options can deliver significant
energy savings compared with high water temperature
systems.
STEP 2 Heat Loss Calculation
Insulation Check.
Heat Loss Calculation.
The amount of heat required for a high level of comfort in
a building varies from room to room. Individual heat loss
calculations need to be made for every room in a building,
taking into account factors such as size of walls, number of
doors, size of windows and whether walls are interior or
exterior. One size of heat emitter will not be ideal for all
rooms!
Heat Source Choice.
Heat Emitter Selection.
MYSON has developed a Heatloss CD, which enables you
to make these calculations for your building and to specify
the correct size and number of heat emitters required.
Contact Customer Services on 0845 402 3434 to obtain
your copy.
STEP 4 Heat Emitter Selection
The key point of difference between alternative heat source
choices and traditional gas boilers is that the system water
is set at much lower temperatures. The difference can
typically be in the range of 20-30°C. This has a significant
impact on the suitability and performance level of the
various types of heat emitter available. Making the right
choice can improve efficiency, save energy and help reduce
emissions.
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High Efficiency Heat Sources and Panel Radiators
The primary function of any heating system is to supply
heating energy to a building so that its occupants feel
comfortable. Typically, this means heating rooms to and
maintaining them at a temperature of around 20°C.
In the UK, the majority of our heating systems are water
based, utilise gas boilers as their heat source and use panel
radiators as their main type of heat emitter. Traditionally we
use these boilers to heat water to 80°C in order to bring
rooms up to a temperature of 20°C.
Heat pump
Solar energy
Biomass
/wood
The introduction of modern insulation materials and
standards, however, has resulted in significantly reduced
heat losses and, therefore, lower demand for heat in
buildings. New heat sources, such as heat pumps, have
been developed to work with system water set at
significantly lower temperatures. It is no longer necessary
to heat water to 80°C in order to achieve a room
temperature of 20°C. A high efficiency heat source, with
panel radiators and water at 40°C- 50°C uses less energy
and will quickly achieve a room temperature of 20°C.
Local/district
heating
Oil
Gas
Electric
Modern panel radiators need only warm water to operate efficiently and so work well with all heat sources. They
start performing as soon as the water in the system becomes warmer than the surrounding space. Low water
temperature heating systems using modern panel radiators are one of the most efficient ways of using heating
energy to deliver warmth.
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Innovation in panel radiators - optimising heat output
1970s
Plane panel structure
and high water content
Style and
Innovation
Convector fins introduced
between water channels
Panel radiators have benefitted enormously from
continuous innovation in recent years. Modern units are
manufactured using less steel and with a lower water
content, utilising convector fins and incorporating individual
thermostatic radiator valves to provide much improved
energy efficiency, indoor comfort and versatility.
Continued innovation also means that radiators no longer
need to take up large areas of wall space. For example,
MYSON have recently launched a T33 panel radiator
model, which has three panels and three convectors. This
is ideal for use with low water temperature heating systems
as it has a very large surface area but is still extremely
compact in size. It is deeper than a standard single panel
radiator but, crucially, occupies only minimal wall space.
Water content reduced
and fins placed in contact
with hotter channels
Present
Channels flattened and
contact surface area
maximised
Modern panel radiators use less water, less energy and react more quickly to thermal heat changes.
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Calculating Radiator Outputs
Size Does
Matter
How the Delta T (ΔT) Table Works
Boiler (ΔT50°C)
Based on room temperature of 20°C
and radiator output of 1kW
Renewable (ΔT25°C)
Mean Radiator Temperature (°C)
Flow
Temperature (°C)
Radiators for low temperature systems are physically and technically the same as
traditional panel radiators. The only key factor which changes is sizing.
The same size of radiator will not produce the same heat output with a low
temperature system as it will with a high temperature system. Put simply, a radiator
that is heated to 45°C will not produce as much warmth as one that is heated to 80°C.
Whilst improvements in insulation have reduced demand for heat in buildings, if you
are doing renovation work and fitting a heat pump where previously a gas boiler was
in use, to achieve the same heat output you will generally still need to replace the
existing radiators with new ones that have larger surface areas. The key is to ensure
that heat loss calculations are made for each individual room in a building in order to
accurately identify the correct size and number of radiators for each situation.
80
50
70
45
Return
Temperature (°C)
60
40
Boiler (ΔT50°C)
Difference between mean radiator temperature and room temperature is 70°C - 20°C = 50°C.
From conversion factor table, delta T (ΔT) factor for 50°C difference is 1.
If MYSON’S stated output is 1kW then multiplying this by 1 shows actual radiator output in these
conditions is 1kW.
Renewable (ΔT25°C)
Difference between mean radiator temperature and room temperature is 45°C - 20°C = 25°C.
From conversion factor table, delta T (ΔT) factor for 25°C difference is 0.41.
If MYSON’S stated output is 1kW then multiply this by 0.41 to get actual radiator output in these
conditions (0.41 x 1 = 0.41kW). You therefore need to use at least two of this size radiator to meet
1kW requirement or choose a more powerful radiator with an output of 2.44kW as 0.41 x 2.44 = 1kW.
NB: Please reference MYSON literature for a table of conversion factors.
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Rapid
Response
Indoor
Comfort
Warmth is both one of life’s necessities and one of its
pleasures. Our bodies are programmed to seek out sources
of warmth, such as the heat given off by an open fire. We
do this even when the room temperature is already warm.
The heat given off by a radiator is no different to that given
off by a fire.
Another significant advantage of panel radiators, especially
those fitted with individual thermostatic controls, is that they
react quickly and precisely to changing temperature needs.
This means not just that they warm up quickly when heat is
needed but also, equally importantly, that they cool down
quickly and efficiently when heat is no longer required.
Whilst a lot of emphasis is placed on heat losses, an energy
efficient heating system also has to be able to react rapidly
to incidental heat gains within individual rooms. These heat
gains could come, for example, from people entering a
room, from sunlight or from electrical equipment being
switched on. If the heating system cannot react quickly
to these heat gains then rooms can quickly overheat and
result in wasted energy.
Radiators are a visible source of warmth in a room and the
human body can feel the heat they give off from a distance
of about one metre. Warming yourself by a radiator is a
similarly pleasurable experience to warming yourself by a
fire or soaking up the summer sun.
Radiators have flexible heat output which means that they
react quickly to changing temperature needs. They also
distribute warmth easily and evenly across a complete
building or individual rooms. The temperature is the same
at head height as it is for your feet!
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Compatible with Underfloor Heating
A common misperception is that heat pumps are suitable
for use only with underfloor heating. In fact, they
also function perfectly with modern panel radiators.
Furthermore, with a low temperature heating system it is
possible to use the same heating water for both radiators
and underfloor heating.
Panel radiators are ideally suited for use alongside
underfloor heating and fan convectors in the same
building. Each system complements the strengths of the
other regarding convection, circulation, comfort and
temperature profile.
Panel radiators are widely recognised as the UK’s most cost
effective heating option. They have low capital investment
costs, are easy to install and will operate practically
maintenance free, as they have no moving parts and do not
experience wear, for several decades. As a result, they have
very low life cycle costs.
More style
More models
PREMIER Compact
The range of styles, outputs and sizes now available is also greater than ever.
All MYSON panel radiators are manufactured in the UK and come with a 10-year
warranty. Our range includes round top and classic seam top units. These are also both
available in conventional and compact styles, the latter of which come complete with
factory fitted top grilles and side panels.
PREMIER HE
SELECT Compact
SELECT
The MYSON product range is now also more widely available than ever before through
leading national heating and plumbing merchants. For details, contact our Customer
Services direct on 0845 402 3434 or visit www.myson.co.uk.