GB2452905A - Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder - Google Patents

Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder Download PDF

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Publication number
GB2452905A
GB2452905A GB0711744A GB0711744A GB2452905A GB 2452905 A GB2452905 A GB 2452905A GB 0711744 A GB0711744 A GB 0711744A GB 0711744 A GB0711744 A GB 0711744A GB 2452905 A GB2452905 A GB 2452905A
Authority
GB
United Kingdom
Prior art keywords
boiler
solar panel
hot water
heating loop
loop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0711744A
Other versions
GB0711744D0 (en
Inventor
Navin Kalian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAVIN DR KALIAN
Original Assignee
NAVIN DR KALIAN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NAVIN DR KALIAN filed Critical NAVIN DR KALIAN
Priority to GB0711744A priority Critical patent/GB2452905A/en
Publication of GB0711744D0 publication Critical patent/GB0711744D0/en
Publication of GB2452905A publication Critical patent/GB2452905A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/004—Central heating systems using heat accumulated in storage masses water heating system with conventional supplementary heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0036—Domestic hot-water supply systems with combination of different kinds of heating means
    • F24D17/0063—Domestic hot-water supply systems with combination of different kinds of heating means solar energy and conventional heaters
    • F24D17/0068—Domestic hot-water supply systems with combination of different kinds of heating means solar energy and conventional heaters with accumulation of the heated water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
    • F24D19/1033—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve motor operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1057—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

A circuit allows switching between a boiler 2 heating loop and a solar panel 1 heating loop, where the circuit enables a single common heat exchange coil 7 to be utilised within a hot water cylinder 3. A thermostat 14 may be installed on the hot water cylinder. A mid-position valve 4 may be utilised to switch between the boiler heating loop and the solar panel heating loop. Preferably, relays 9, 10 are used to complete a 240 VAC mains electrical circuit to power a pump 8 which can circulate a heat transfer fluid, such as water, for either heating loop through the single heat exchange coil. One-way (check) valves 5, 6 may be used to prevent the heat transfer fluid flowing from one loop to the other. Anti-freeze may be used in the solar panel heating loop.

Description

1 2452905 Circuit for combining a solar water heating loop with a gas-fired hot water boiler heating loop for a single-coil hot water cylinder.
This invention relates to a circuit for combining a solar water heating loop from one or more solar panels with the hot water heating loop from the boiler. This arrangement allows indirect hot water cylinders with a single coil to be used to combine water heating from both solar panels and a gas-fired boiler. Through the use of a control circuit and a mid-position valve, it will be demonstrated that an innovative invention for the above claim has been achieved.
Conventional solar water heating systems use a twin-coil hot water cylinder. One coil is used to circulate heated water from the solar panel and the other coil is used to circulate heated water from the gas-fired boiler. However, through the use of the proposed circuil a typical single coil hot water cylinder can be used; saving the need to replace the hot water cylinder during the installation of a solar water heating system.
Two relays are used to start and stop a common pump for both loops. The relays are switched by either the solar water heating controller or from the boiler timer. The circuit uses a mid-position valve to alternate between two heating loops (boiler loop and solar panel loop). The valve in the mid-position valve is switched through the same relays from either the solar water heating controller or the boiler timer. The relays are wired in a configuration which allows valve position precedence to be given to the boiler heating loop and hence factoring safety into the circuit The invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 shows the circuit with the solar water heating panel, boiler and the indirect hot water cylinder. Furthermore, the controlling circuit has also been included.
Figure 1 shows the circuit combining the gas-fired boiler and the solar panel. From Figure 1, it can be seen that there are two methods for heating water fed to the hot water cylinder [3]. There is a solar panel [1] and the gas-fired boiler [2]. There is a single coil [7] within the hot water cylinder [3] which can be used to transfer heat energy from either the solar panel or the gas-fired boiler. A mid-position valve [4] with a motored ball valve, regulated by a mains voltage is used to alternate healing loops between solar panel(s) and the gas-fired boiler. The mid-position valve [4] is set to position [A] by mains voltage sent from the boiler controller through the coil of a 240 VAC relay which closes the relay switch and completes the circuit allowing the mid-position valve to change to position [A]. Figure 2 shows the electrical wiring diagram. In position [A], the water flows through the boiler loop. The default position is [B], which allows heating through the solar panel loop.
The pump [8] is controlled by either the solar controller [12] or the boiler controller [11].
When either controller sends a live signal, the mains circuit is completed and a live supply is sent through either relay A [9] or relay B [10] to the pump. The solar coniroller is not time dependent but rather temperature dependent. Therefore a scenario could exist whereby both the boiler controller and the solar controller could power the pump. In this situation, the pump would be powered through a parallel mains circuit, see Figure 2 and Table 1, however, the mid-position valve would be set in position [A] to allow the boiler circuit to be completed. This is due to the fact that the water in the boiler loop will reach extremely high temperatures in comparison to the solar panel.
A thermostat [14] is installed on the hot-water cylinder, once the desired temperature within the hot-water cylinder is reached, the thermostat switch is opened and the live supply is discontinued, Table 2.
A filling valve [13] which tops up water for the boiler healing loop can also be used to supply water for the solar heating loop.
Since the boiler is time operated, it is envisaged that the boiler will operate in the morning where a demand for hot-water is needed. Then during the day the solar panel(s) will gather heat and heat the water in the cylinder by whatever the conditions for the day dictate. It has been researched that the maximum temperature of water observed from the solar panels is reached at 4pm. Therefore, the boiler would be timed to come on after 4pm and supply the additional heat needed to reach the desired temperature of the water in the hot water cylinder.
An expansion valve [7] is used to allow any excessive pressure build-up in the solar heating loop to be vented off.
A single pump [8] is used for both the boiler and the solar water heating loop.
One-way valves [5] [6] are used to prevent water flowing from one loop (i.e. boiler loop) into the other loop (i.e. solar panel loop).
The header tank [15J allows air bubbles to be expelled from solar panel loop.

Claims (2)

  1. Claims 1. A circuit has been developed which allows switching between the heating loop from a boiler and the heating loop from a solar panel This allows a single coil within a hot water cylinder to be utilized.
  2. 2. A two-ball valve can be used for switching instead of a single ball valve. This would allow the two circuits to remain independent and allow anti-freeze to be used in the solar panel heating loop.
GB0711744A 2007-06-19 2007-06-19 Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder Withdrawn GB2452905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0711744A GB2452905A (en) 2007-06-19 2007-06-19 Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0711744A GB2452905A (en) 2007-06-19 2007-06-19 Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder

Publications (2)

Publication Number Publication Date
GB0711744D0 GB0711744D0 (en) 2007-07-25
GB2452905A true GB2452905A (en) 2009-03-25

Family

ID=38332288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0711744A Withdrawn GB2452905A (en) 2007-06-19 2007-06-19 Heating system comprising separate solar panel and boiler heating loops in conjunction with a single-coil hot water cylinder

Country Status (1)

Country Link
GB (1) GB2452905A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105864870A (en) * 2016-05-30 2016-08-17 北京天赐馨圆清洁能源科技有限责任公司 Multi-tank type solar heating system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625985A1 (en) * 1976-06-10 1977-12-22 Buderus Eisenwerk Solar heating of water with standby boiler - which is automatically switched on when solar heat is inadequate
DE29913263U1 (en) * 1999-07-30 1999-12-02 Buderus Heiztechnik Gmbh Heating system
DE202005000868U1 (en) * 2005-01-20 2005-03-31 Strebe Juergen Heating system, powered directly by solar energy, has a second heater on stand-by during sunlight hours linked to the system through a three-way valve and using a recirculating heat-carrier medium
DE102005002932B3 (en) * 2005-01-21 2006-05-11 Robert Bosch Gmbh Solar system regulating method for heating system, involves linking modes of operation, switching threshold, and functions for operation with adjustable switching functions for summer and winter operations of controlling units

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625985A1 (en) * 1976-06-10 1977-12-22 Buderus Eisenwerk Solar heating of water with standby boiler - which is automatically switched on when solar heat is inadequate
DE29913263U1 (en) * 1999-07-30 1999-12-02 Buderus Heiztechnik Gmbh Heating system
DE202005000868U1 (en) * 2005-01-20 2005-03-31 Strebe Juergen Heating system, powered directly by solar energy, has a second heater on stand-by during sunlight hours linked to the system through a three-way valve and using a recirculating heat-carrier medium
DE102005002932B3 (en) * 2005-01-21 2006-05-11 Robert Bosch Gmbh Solar system regulating method for heating system, involves linking modes of operation, switching threshold, and functions for operation with adjustable switching functions for summer and winter operations of controlling units

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105864870A (en) * 2016-05-30 2016-08-17 北京天赐馨圆清洁能源科技有限责任公司 Multi-tank type solar heating system
CN105864870B (en) * 2016-05-30 2018-08-28 北京天赐馨圆清洁能源科技有限责任公司 Multipot type solar energy heating system

Also Published As

Publication number Publication date
GB0711744D0 (en) 2007-07-25

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