solar sets - ElektrischeBoiler.EU

Transcription

SOLAR SETS
A SOLAR SYSTEM CONFIGURATION is a set of elements that produce domestic hot water by means of solar energy. As solar energy is free,
it is justified to say that solar systems are practically free and inexhaustible sources of domestic hot water. They only need minimal amounts
of electrical energy to power the circulation pump and the controller.
4 m2 of a solar collector
1000 kg of CO2 less in the atmosphere
a better world
Growing prices of fossil fuels increase the costs of acquiring domestic hot water. Therefore, installation of solar systems obviously reduces
the costs of domestic hot water generation. Another important aspect of their employment consists in the fact that they contribute to a reduction
of the emission of greenhouse gases. Solar power systems constitute a very pro-ecological source of hot water. The total area of 4 m2 of flat
solar collectors or a vacuum tube collector consisting of 30 tubes prevents one ton of carbon dioxide from being emitted into the atmosphere
annually, as compared to a modern gas-fuelled central heating boiler.
In Europe, depending on the place sun delivers 700-1900 kWh/m2 of a flat surface, one may assume that the radiation carries energy of about 1000 kWh/m2
annually, which corresponds to the energy contained in 100 litres of fuel oil.
In Central Europe, during periods of intense sunlight (summer), a solar system may cover even up to 100% of the demand for hot domestic water. During
an entire year, such system covers on average about 60% of the demand. Moreover, such solutions allow the following energy demands to be covered:
- support of low-temperature central heating: up to 10%;
- seasonal heating of swimming-pool water up: up to 90%. The solar fraction [%] of the demand
for energy to heat hot domestic water
in a single family house in successive months in Central Europe
100
86
86
89
86
83
75
80
62
59
60
41
40
24
29
24
20
0
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
Hot water cylinders with two coil pipes that are implemented in solar heating systems can work both with a solar system and with another
source of heating water, such as a gas-fuelled central heating boiler. The principle of solar system operation may be briefly described in
the following manner: A solar thermal collector heats up, when solar radiation falls on its surface. Then, it transfers heat to solar heating medium.
The medium is pumped to the coil pipe in the hot water cylinder, where it transfers the heat to domestic water. Then, it returns to the solar
thermal collector. The entire operation of a solar system is regulated by a controller and protected by means of a number of elements included
in the system package.
58
SOLAR SET CONFIGURATIONS - EXAMPLES
Flat solar thermal collector
FLAT SOLAR
THERMAL COLLECTORS
Membrane
vessel
Solar set
controller
Hot domestic water outlet
Central heating boiler
O
65 C
O
C OC
B
Water heater
with two coils
Circulation pump
of the circulation system
Pump group
cold domestic water inlet
Vacuum tube collector
SOLAR VACUUM
TUBE COLLECTORS
Membrane
vessel
Solar set
controller
Hot domestic water outlet
Central heating boiler
65OC
O
C OC
B
Water heater
with two coils
Circulation pump
of the circulation system
Pump group
cold domestic water inlet
59
SOLAR SETS
BASIC COMPONENTS OF SOLAR HEATING SYSTEMS
A WATER HEATER WITH TWO COIL PIPES: is a vertical hot water exchanger, fitted with two coil pipes that are designed to be connected to a solar system
(the lower coil pipe) and, for instance, to a coal-fuelled central heating boiler (the upper coil pipe). Hot water cylinders used in solar systems are characterized
by a large water capacity, which allows large amounts of hot water to be accumulated during periods of intense insolation, to be used later on during less sunny days.
PUMPING ASSEMBLY: Its principal function consists in driving the circulation of the solar heating medium. The assembly is also fitted with elements that are
indispensable to ensure proper and safe operation of a solar heating system. The pumping assembly consists, among others, of the following elements:
a circulation pump designed for solar heating systems, a rotameter, a safety valve, a pressure gauge, an air separator, two thermometers, connectors to
a membrane expansion vessel and topping-up valves.
SOLAR HEATING SYSTEM CONTROLLER: It is a digital system that regulates the entire operation of the system. Such controllers regulate the operation
of the pump in the pumping assembly and does so with the help of the data collected by the temperature sensors installed, for instance, in a solar collector
and in a hot water cylinder. The functions implemented in the solar heating system controllers include: reverse cooling (cooling the water down in the tank
to prevent the water in the cylinder from boiling, anti-freezing protection, tank disinfection, reading of the energy generated in solar collectors
SOLAR SYSTEM HEATING MEDIUM: It is a mixture of glycol and other components, whose freezing temperature is lower than the freezing point of water.
The reduced freezing temperature guarantees that the solar installation does not get damaged during periods when temperatures outside drop below zero.
SOLAR DIAPHRAGM VESSEL: It is a tank with an internal rubber membrane. Its function consists of compensating changes in the volume of the solar
heating medium caused by its thermal expansion (not by its losses) and in maintaining the pressure of the heating medium at a constant predetermined level.
MANUAL VENT WITH A SENSOR HOUSING: It is an indispensable part of the solar heating system fittings. It contains a protective tube for a solar
regulator sensor, including a setting screw and a manual vent.
SOLAR THERMAL COLLECTORS: These are the essential components of solar power systems. It is in the collectors, where solar radiation is transformed
into thermal energy transferred through the solar heating medium.
FLAT COLLECTORS: An absorber is an important part of the collector. The purpose of an absorber consists in absorbing as much solar radiation energy as
possible and in transforming it into thermal energy, while maintaining heat radiation at the minimum level. Absorbers are made of copper sheets coated with
a highly specific absorptive layer. A solar collector is insulated with mineral wool to prevent heat losses. The wool lines the collector housing, consisting of
an aluminium frame and, in the lower part, of galvanized or other metal sheet. In the top part, a collector is fitted with a solar glass pane, made of safe and
hardened glass that is characterized by its high resistance to mechanical impact (which also includes certain types of hailstorm impacts) and by the maximum
transparency to solar radiation.
VACUUM TUBE COLLECTORS OF HEAT-PIPE TYPE: A highly selective absorbent layer is deposited by sputtering on the internal layer of a vacuum tube.
The layer guarantees the high efficiency of solar radiation absorption. The radiation energy is transformed into thermal energy and then, through a radiator,
it is transferred to a copper tube. The copper tube contains an evaporating substance that transfers heat to the condenser that, in turn, transfers it to the
collecting pipe of a heat exchanger, which the solar heating medium flows through. The medium is then transferred to a coil pipe in a hot water exchanger.
The collecting pipe of the heat exchanger is insulated to protect it against heat losses, and it is encased in a metal housing. The glass used to manufacture
the vacuum tube is characterized by its special chemical composition that guarantees a high resistance to mechanical impact, as well as the maximum
transparency to solar radiation.
PROPERLY MOUNTED SOLAR THERMAL COLLECTORS should be inclined at an angle within the range from 30 to 45
O
and they should face southward.
FLAT OR VACUUM TUBE COLLECTOR ?
The FUNDAMENTAL DIFFERENCE between a flat collector and a vacuum tube collector consists in their construction and application.
A flat collector is characterized by its large absorbent surface area, a short distance covered by the Sun’s rays before they get to the absorber and
by direct contact of the absorber with the medium flowing through the collector. Such a collector performs well in good weather conditions.
On the other hand, a vacuum tube collector takes advantage of the vacuum (thermal insulator) in its construction. It makes up in efficiency during
the autumn and winter period, when the energy demand increases. When selecting a collector type, one should answer the following questions: when
is the solar system to be used and for what purpose.
Comparison of the calorific effect of a flat collector and a vacuum tube collector during a period of an entire year
Vacuum tube collector
Flat collector
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
60
SOLAR SETS
An analysis of the diagram indicates that the vacuum tube collector operates faster and longer and "overlaps" with the heating period, while
the operation of the flat thermal collector corresponds to the period outside the heating season. Thus, solar vacuum tube collectors support a central
heating system. - The process consists the n preliminary heating up of water in the domestic hot water tank by means of the lower coil pipe that is
connected to the collector, so that the upper coil pipe connected to the central heating system consumes less heat energy to heat water up.
Another difference is the resistance to hailstorms. Flat thermal collectors have a thicker glass layer, which makes them more resistant to hail impact.
Due to their construction, no reverse cooling (holiday absence function) can be implemented in vacuum tube collectors with the heat pipe technology.
Vacuum tube collectors are very well suited to operating at low temperatures and at low radiation intensities.
Practical experience shows that they may be up to 30% more efficient during the winter season than flat collectors.
On the other hand, flat collectors are characterized by high optical efficiency, which translates into higher output during the summer period.
Due to these differences, flat collectors are generally only about 10% less efficient than vacuum tube collectors, when the entire year is considered.
RECAPITULATION
- flat collectors are recommended for any type of seasonal installations meant to operate in the summer period. They are a perfect choice
for installations that heat up the water in swimming pools, as well as for installations that heat hot water in single family houses, camping sites
or summer refuges.
- vacuum tube collectors are practically irreplaceable in installations designed to support central heating systems or in domestic hot water
installations, when solar fraction is assumed to be high..
ADVANTAGES, DISADVANTAGES AND PURPOSE
Flat solar thermal collectors
Advantages
Disadvantages
Purpose
Solar vacuum tube collectors
- high optical efficiency,
- good resistance to hailstorms,
- possibility of reverse cooling,
- very good heat insulation,
- low flow resistance values,
- easily serviceable,
- high flow resistance values,
- fast efficiency decrease at low temperatures
- possible misting of collector glass pane,
- low optical efficiency,
- lower resistance to hailstorms,
- no possibility of reverse cooling,
- heating swimming pool water in the summer,
- seasonal installations operating in the summer,
- support of domestic hot water system,
when the solar fraction is low in winter,
- support of central heating systems,
- support of domestic hot water system,
when the solar fraction is high all year round
SOLAR SYSTEM DURING HOLIDAY ABSENCE – NO HOT DOMESTIC WATER IS DRAWN OFF
As it is impossible to "switch the Sun off", a solar system keeps operating during our holiday absences as well. During this period, no hot
water is drawn off. Therefore, the solar installation may get overheated, which increases the pressure (solar heating medium is let out through
the safety valve). This, in turn, may lead to permanent damage of the collectors and the entire installation. There are several solutions aimed
at preventing solar systems from getting overheated:
-collectors may be covered, for instance, with canvas or blinds, to prevent solar rays from accessing system collectors,
-the Holiday Absence function (reverse cooling) may be activated at the controller [option available only for flat collectors], so that it switches
the pump in the night to allow the heat accumulated in the hot domestic water cylinder can be radiated through collectors, which cools the
cylinder down,
-cooling the system down through the swimming pool: as a swimming pool has large water capacity and large surface area, it is a practically
inexhaustible heat accumulator and therefore it can accept heat surplus accumulated in the hot domestic water cylinder.
-cooling the system down through the central heating system: when the circulation pump of the central heating system is switched on and the
valves get opened, hot water collected in the hot domestic water cylinder will get cooled down through the top coil pipe that gives heat up to the
radiators installed in the house.
SELECTION OF A SOLAR SYSTEM CONFIGURATION
As solar systems are primarily used to heat up hot domestic water, their configuration is selected according to the number of users, on
the basis of the - table presented below that assumes the average daily consumption of hot domestic water at the level of 50-75 litres per user.
Number of users
System with
flat collectors
and a tank
System with
vacuum tube
collectors
and a tank
System with
flat collectors
(without a tank)
System with
vacuum tube
collectors
(without a tank)
System with
a tank
without thermal
collectors)
+
a family
of 3
ZS200-2P
ZS250-2P
ZS200-22R
ZS-2P
ZS-22R
ZS200
ZS250
+
a family
of 4
ZS300-3P
ZS300-36R
ZS300-44R
ZS-3P
ZS-36R
ZS300
+
a family
of 5
ZS400-4P
ZS400-44R
ZS-4P
ZS-44R
ZS400
a family
of 6
ZS500-5P
ZS500-54R
ZS-5P
ZS-54R
ZS500
+
Another system configuration may prove optimal due to different consumption levels.
61
SOLAR SETS WITH WATER HEATER AND FLAT SOLAR COLLECTORS
Name
200L +
2 plates
250L +
2 plates
300L +
3 plates
400L +
4 plates
500L +
5 plates
Symbol
ZS200-2P
ZS250-2P
ZS300-3P
ZS400-4P
ZS500-5P
Water heater with two coil pipes 200
1
1
1
1
2-way pump group
1
1
1
1
1
1
Flat solar thermal collector 2m
2
2
3
4
5
Solar set controller
1
1
1
1
1
Solar membrane vessel 18L
1
1
1
1
2
Solar membrane vessel 24/25L
1
Vessel connection set
1
1
1
1
1
Solar set fluid 20L
1
1
1
2
2
Vent with sensor housing
1
1
1
1
1
Double-sided coupler, fi 22mm
1
1
2
3
4
Coupler, fi 22mm / 3/4" thick
1
1
1
1
1
200L +
2 plates
250L +
2 plates
300L +
3 plates
400L +
4 plates
500L +
5 plates
Selection of set configuration /
brackets
Number of users
+
+
+
+
+
Bracket for plate mounting on a
slanting roof
S.US2P - 1
S.US2P - 1
S.US3P - 1
S.US2P - 2
S.US2P - 1
S.US3P - 1
Flat roof mounting structure
S.UP2P - 1
S.UP2P - 1
S.UP3P - 1
S.UP2P - 2
S.UP2P - 1
S.UP3P - 1
The selection of system configuration is based on a daily consumption of hot domestic water at the level of 50-75 litres per user.
P.P.U.H. LEMET reserves the right to introduce modifications without providing prior notice or justification.
62
SOLAR SETS WITH WATER HEATER AND VACUUM SOLAR COLLECTORS
Name
200L +
22 tubes
300L +
36 tubes
300L +
44 tubes
400L +
44 tubes
500L +
54 tubes
Symbol
ZS200-22R
ZS300-36R
ZS300-44R
ZS400-44R
ZS500-54R
1
1
1
1
2-way pump group
1
1
1
1
1
2
2
1
1
1
1
1
1
2
18-tube vacuum tube collector
1
1
1
3
1
1
1
1
1
1
1
Solar set fluid 20L
1
1
1
2
2
1
1
1
1
1
Selection of set configuration
Number of users
1
1
1
2
1
1
1
1
1
200L +
22 tubes
300L +
36 tubes
300L +
44 tubes
400L +
44 tubes
500L +
54 tubes
+
+
+
+
The selection of system configuration is based on the daily consumption of hot domestic water at the level of 50-75 litres per user.
63
1
+
SOLAR SETS WITH FLAT SOLAR COLLECTORS WITHOUT WATER HEATER
Nazwa
2 plates
3 plates
4 plates
5 plates
Symbol
ZS-2P
ZS-3P
ZS-4P
ZS-5P
1
1
1
1
Flat solar thermal collector 2m
2
3
4
5
1
1
1
1
1
1
1
2-way pump group
2
1
1
1
1
1
Solar set fluid 20L
1
1
2
2
1
1
1
1
1
2
3
4
1
1
1
1
2 plates
3 plates
4 plates
5 plates
cylinder / brackets
Number of users
+
+
+
+
Cylinder capacity
200/250L
300L
400L
500L
Bracket for plate mounting
on a slanting roof
S.US2P - 1
S.US3P - 1
S.US2P - 2
S.US2P - 1
S.US3P - 1
Flat roof mounting structure
S.UP2P - 1
S.UP3P - 1
S.UP2P - 2
S.UP2P - 1
S.UP3P - 1
The selection of system configuration and tank is based on the daily consumption of hot domestic water at the level of 50-75 litres per user.
Another system configuration and tank type may prove optimal due to different consumption levels.
64
SOLAR SETS WITH VACUUM TUBE COLLECTORS WITHOUT WATER HEATER
Name
22 tubes
36 tubes
44 tubes
54 tubes
Symbol
ZS-22R
ZS-36R
ZS-44R
ZS-54R
1
1
1
1
2-way pump group
2
1
1
1
3
2
1
1
1
1
1
1
1
1
1
1
Solar set fluid 20L
1
1
2
2
1
1
1
1
1
1
2
1
1
1
1
22 tubes
36 tubes
44 tubes
54 tubes
cylinder
Number of users
Tank capacity
+
200L
+
300L
+
400L
The selection of system configuration and tank is based on the daily consumption of hot domestic water at the level of 50-75 litres per user.
Another system configuration and tank type may prove optimal due to different consumption levels.
65
+
500L
SOLAR SETS WITH WATER HEATER AND WITHOUT SOLAR COLLECTORS
Nazwa
Name
200L +
200L
2 płyty
250L +
250L
2 płyty
300L +
300L
3 płyty
400L +
400L
4 płyty
500L +
500L
5 płyt
Symbol
ZS200-2P
ZS200
ZS250-2P
ZS250
ZS300-3P
ZS300
ZS400-4P
ZS400
ZS500-5P
ZS500
Zbiornik
Water
heater
dwu wężownicowy
with two coil pipes
200 200
1
Zbiornik
Water
heater
dwu wężownicowy
with two coil pipes
250 250
1
Zbiornik
Water
heater
dwu wężownicowy
with two coil pipes
300 300
1
Zbiornik
Water
heater
dwu wężownicowy
with two coil pipes
400 400
1
Zbiornik
Water
heater
dwu wężownicowy
with two coil pipes
500 500
1
Grupa pump
2-way
pompowa
group
2 drogowa
1
1
1
1
1
1
2
1
2
1
3
1
4
1
5
1
1
1
1
1
1
1
1
1
1
Solar set fluid 20L
1
1
1
2
2
1
1
1
1
1
200L
250L
300L
400L
500L
collectors
Number of users
Type of collectors
+
2 plates or
22 tubes
+
2 plates
+
3 plates or
36 tubes
+
4 plates or
44 tubes
+
5 plates or
54 tubes
The selection of system configuration is based on the daily consumption of domestic hot water at the level of 50-75 litres per user.
Another system configuration and collector type may prove optimal due to different consumption levels.
66
FLAT SOLAR THERMAL COLLECTORS
WELL-TRIED, RELIABLE construction, based on
the implementation of a single-harp set of tubes.
COPPER ABSORBER covered with a highly-selective
ETA PLUS coating that ensures 95% absorption of
solar radiation.
HIGH THERMAL CONDUCTIVITY between the absorber
and the solar heating medium, thanks to the implementation
of the soldering technology to the absorber-connecting pipes.
SOLAR GLASS PANE, characterized by special chemical
composition that guarantees high resistance to mechanical
damages, while maintaining maximum transparency to solar radiation.
The pane is made of safe hardened glass, characterized by enhanced
resistance to hailstorms.
INSULATION made of a thick layer of mineral wool.
COLLECTOR HOUSING made of an aluminium profile
with solar glass pane seated in it.
hardened solar glass pane
absorptive layer
thermal insulation
aluminium frame
copper pipes
67
FLAT SOLAR THERMAL COLLECTORS
Kolektory
płaski collector
Flat
solar thermal
Typ
Type
7020S
mm
2019 / 1019 / 81
kg
36,6
L
1,1
S.KS2M2
Symbol
Dimensions: height / width / thickness
Weight (without liquid)
Liquid volume
Solar glass pane
mm
3
Gross surface area
m2
2,05
Absorber surface area
m2
1,852
Connection stub pipes
mm
22 / 22
Efficiency coefficient
0,755
Maximum working pressure
MPa
Medium flow through the collector
Collector medium pressure drop
0,6
L/min
1,1
kPa
0,2 - 2,8
Coefficient a1 (heat loss coefficient)
W/m2K
3,38
Coefficient a2 (heat loss temperature dependence)
W/m2K2
0,016
kN/m2
Admissible wind- and snow-generated loads
Absorber
max 1,5
ETA PLUS - BlueTec CU - 95% absorption
Soldered
Absorber connection
O
Maximum stagnation temperature
Mineral wool insulation
C
207
mm
45
Housing
aluminium
2 x plate S 3 x plate S 1 x plate P 2 x plate P 3 x plate P
Symbol
Number of collectors
Installation conditions
S.US2P
S.US3P
S.UP1P
S.UP2P
S.UP3P
2
3
1
2
3
slanting roof
slanting roof
flat roof
flat roof
flat roof
68
SOLAR VACUUM TUBE COLLECTORS
A WELL-TRIED, RELIABLE construction, based
on the implementation of a double-walled tube
as the absorbing element, with a vacuum in the space
between the walls. The vacuum functions as thermal
insulation. The internal surface of the tube is covered
with highly-selective absorptive coating. Inside the tube,
there is a heat pipe – the element that condenses thermal
energy. The energy from the internal tube is transferred
to the heat pipe by means of a moulded aluminium tapes.
Heat is accumulated in the head, where it is given up to
the solar system.
The HEAT PIPE is made of the highest quality
copper, characterized by a high thermal
conduction parameter.
BORON-SILICON GLASS 3.3 guarantees resistance
to mechanical damage, while it maintains a high
transparency to heat radiation.
COLLECTOR HEAD: a powder-coated aluminium mould,
resistant to atmospheric conditions. A thick layer
of compacted mineral wool guarantees excellent insulation.
RELIABILITY: guaranteed stable operation and
resistance to overheating.
HEATING MEDIUM: the tube is filled with a special
medium, that eliminates such defects as corrosion and
deposition of impurities that inhibit liquid flow.
ABSORPTIVE SURFACE: highly-selective coating deposited
applied to the internal tube wall. Absorption of thermal
radiation = 95%.
VACUUM: absorber surface is isolated from atmospheric
conditions with 5x10-3 Pa vacuum in the space between
tube walls. Efficient operation in the season transition periods
(e.g. autumn-winter).
solar heating medium circulating
between collector head and tank
thermally-insulated
collector head
solar radiation falling
on the absorber
rubber plug
copper pipe
aluminium radiator
special liquid circulating in a closed cycle
inside the copper tube
condensed liquid flowing down
the copper tube (closing the cycle)
69
SOLAR VACUUM TUBE COLLECTORS
Lemsol - solar evacuated tube collectors
Type
Symbol
Number of vacuum tubes
items
Tube structure
1800R
2200R
3000R
S.KS18R
S.KS22R
S.KS30R
18
22
30
HEAT PIPE- type vacuum tube – a round absorber
15 - 60O
Mounting angle
Tube diameter
mm
58
Wall thickness
mm
1,6
Glass permeability
Vacuum
> 0,90
< 10-5
mBar
Collector height
mm
Collector width
mm
Collector depth
mm
Collector weight
kg
63,8
77,7
105,0
L
1,16
1,39
1,85
Liquid volume
1990
1495
2455
1815
182
Connection stub pipes
mm
22
Maximum working pressure
bar
Total surface area
m2
2,98
3,61
4,89
Active surface area of the absorber
m2
1,37
1,675
2,28
Aperture area
m2
2,21
2,70
3,68
6
Material
Al/Cu/boron-silicon glass/stainless steel
Coating
Highly selective based on copper
Insulation
Vacuum/mineral wool
Absorption
> 92%
Emission
< 8%
Optical efficiency coefficient
0,798
Linear heat loss coefficient
W/(m2K)
1,67
Non-linear heat loss coefficient
W/(m2K2)
0,006
Tube stagnation temperature
0
C
Module stagnation temperature
0
C
Manufacturer
Manufacturer's designation
247
215
Changzhou Blueclean Solar Energy Co. Ltd.
SB-58/1800-18ST
SB-58/1800-22ST
SB-58/1800-30ST
70
SOLAR PUMP GROUP
STRONG STRUCTURE as assembly elements are mounted to the steel back plate.
A LARGE AIR SEPARATOR made of brass guarantees that air particles in the charge
are properly captured. Thus, the entire assembly operates properly and without disturbances.
RESISTANT TO CORROSION thanks to the implementation of brass
in the pumping group structure (formation of a galvanic cell is avoided).
GRUNDFOS LOW ENERGY PUMP designed especially for solar systems,
characterized by low electrical power consumption.
CONVENIENT-TO-USE FLOWMETER allows one to set the required flow quickly.
COMPREHENSIVE PROTECTIVE ASSEMBLY consisting of a safety valve, a connector
to a membrane expansion vessel, a pressure gauge, thermometers, cut-off valves and
fill-up valves, an air separator.
AESTHETIC AND EFFECTIVE INSULATION made of expanded polypropylene foam (EPP).
Non-return ball valve
with a thermometer
Non-return ball
valve with
a thermometer
Safety valve
Pressure gauge
Connector to a membrane
expansion vessel
Air
separator
Circulation pump designed
especially for solar systems
Throttle element
on the rotameter
Outlet valve for solar
system heating agent
Rotameter
Inlet valve for solar
system heating agent
Pumping assemblies
Type
Symbol
Flowmeter regulation range
L/min.
2-12
8-28
S.GP2-12
S.GP8-28
2-12
8-28
Pump
m
Grundfos LowEnergy 25/60 - three-speed
Pump elevation head
m
6
No-return three-way valve
mbar
10
No-return cut-off valve
mbar
10
Safety valve – opening pressure
bar
6
Pressure gauge
bar
10
Maximum operating temp.
O
C
Insulation
Supply/return spacing
Dimensions of the insulating casing (height, width, depth )
Weight
120
expanded polypropylene foam (EPP)
mm
125
mm
277 / 425 / 150
kg
7
71
SOLAR CONTROLLERS
SOLAR CONTROLLERS – they are designed to control
the operation of an entire solar powered system. A set
of microchips controls the entire installation. It receives signals
from temperature sensors and controls the operation of the circulation
pump accordingly. They support several configurations, including
the basic one, consisting of solar thermal collectors and
a storage-type hot water tank, or configurations consisting of,
for instance, solar thermal collectors, a storage-type hot water
tank and a hot water boiler.
VERY EASY to control by means of 4 keys that allow
one to set the appropriate operating parameters quickly.
A LARGE and clear LCD display.
The HOUSING made of high quality materials.
SELECTED FUNCTIONS carried out by the controller:
- control of the pump operation (or the operation of
a pump and a valve),
- supervision over and support of the system operation in nine
different configurations,
- protection against overheating,
- protection against freezing,
an additional device can be connected, e.g. a circulation pump,
an electric heater, or a signal can be sent to a central heating
boiler to fire it up.
F
CENTRAL
HEATING PUMP
Solar controller
CIRCULATION
PUMP
PROTECTION
AGAINST
OVERHEATING
PROTECTION
AGAINST
FREEZING
Type
Symbol
SUPERVISON AND
SUPPORT OF
SOLAR SET
ST-402
S.REGST402
Power supply voltage
V
230V/50Hz
Max. power consumption
W
4
Ambient temperature
O
Max loading at each outlet
C
5-50
A
1
Measurement precision
O
1
Thermal strength of sensors
O
C
-10 do +180
A
3,15
Fuse-element
Temperature adjustment range
Height / width / depth
Weight
C
O
C
8 - 90
mm
165 / 110 / 55
kg
0,46
72
FLUID FOR SOLAR SET
ECOLOGICAL and BIODEGRADABLE liquid provided at
the ready-to-use concentration, ideal for heat exchange systems,
especially heat pumps, solar thermal collectors, air conditioning systems
and for any type of industrial combined heating and cooling systems.
Thanks to the implementation of appropriate corrosion inhibitors
and stabilizing agents, it can be used with practically every type
of materials designed to be used in the construction of system
installations. The medium has been certified by
PZH [National Hygiene Authority].
SOLAR SYSTEM HEATING MEDIUM protects installations
against low temperatures, corrosion and cavitation. It protects
the system against formation of sediment deposits and growth
of microorganisms. The liquid does not contain phosphates, silicates
and borates. It is practically neutral towards majority of plastic
sealing elements, welds and solders that can be found in such
installations. It is characterized by good thermodynamic and
viscosity parameters. It contains pH stabilizers and anti-foaming agents.
ENSURES PROPER PROTECTION of installations. It is non-toxic
and easily biodegradable. Therefore, its use does not involve
considerable hazards for people or natural environment.
Solar system heating medium -35OC 20L
Name
Symbol
S.PS20
Mixture of propylene glycol, corrosion inhibitors, softening agents,
pH stabilizers and alkali reserve, anti-microbial agents,
dyes and water
Chemical name
Clear liquid without mechanical impurities;
admissible slight opalescence
External appearance
Colour
green
pH
7,5 - 9,5
Alkaline reserve ml 0,1n HCl
min. 3
Crystallization temperature
-35 OC
O
1,040 +/- 0,005 g/cm3
Density at 20 C
O
Kinematic viscosity at 20 C
about 6,9 mm2/s
Boiling point
about 107-108 OC
Water solubility
unlimited at any ratio
Other solvents
low aliphatic alcohols, ethylene glycol
Odour
Guarantee period
faint, characteristic
min. 36 months since the production date
73

solar sets - ElektrischeBoiler.EU

Transcription

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