GB2483896A - Heating unit having a heat pump and an auxiliary heating element - Google Patents
Heating unit having a heat pump and an auxiliary heating element Download PDFInfo
- Publication number
- GB2483896A GB2483896A GB1016036.4A GB201016036A GB2483896A GB 2483896 A GB2483896 A GB 2483896A GB 201016036 A GB201016036 A GB 201016036A GB 2483896 A GB2483896 A GB 2483896A
- Authority
- GB
- United Kingdom
- Prior art keywords
- space
- heating element
- heat
- heat pump
- heating unit
- 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- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 56
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 239000003570 air Substances 0.000 abstract 2
- 239000012080 ambient air Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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
- F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
- F24D5/12—Hot-air central heating systems; Exhaust gas central heating systems using heat pumps
-
- 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
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
-
- 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
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat 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
- F24D19/1084—Arrangement or mounting of control or safety devices for air heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/254—Room temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/258—Outdoor temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
-
- 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]
- Y02B30/13—Hot air central heating systems using heat pumps
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)
- Central Heating Systems (AREA)
Abstract
The heating unit comprises: a control interface for setting a target temperature of a first space, such as a room; a heat pump for extracting heat energy from a second space and discharging at least some of the extracted heat energy into the first space to raise the temperature of the first space towards the target temperature; an auxiliary heating element for discharging additional heat into the first space; and a control unit to control the auxiliary heating element. The control unit activates the auxiliary heating element if the heat pump appears incapable of reaching the target temperature, or will reach the target temperature too slowly. The heat pump may be an air to air heat pump, whereby the second space is ambient air and the control unit may operate the auxiliary heating element when the temperature of the ambient air is below a predetermined threshold. The control unit may operate the auxiliary heating element when the temperature of the first space is below a predetermined threshold for a predetermined time period. The auxiliary heating element may be electric. The second space may comprise part of the ground such that the heat pump is a ground source heat pump.
Description
I
Heating Unit The invention relates to a heating unit, for example a heating unit for heating domestic and commercial premises.
Heat pumps are increasingly being used for heating domestic and commercial space as they increase energy efficiency by collecting heat from air outside of the building, concentrating that heat in the heat pump, and then delivering the heat as warm air to the building.
Heat pumps typically achieve an efficiency of two to three, which means that the amount of heat being delivered (energy output) is two to three times the electrical input (energy input). For example, 1000W of input electrical energy would create 2000- 3000W of heat energy.
During a heating season' there will, however, be a number of days when a heat pump fails to achieve the required room temperature due to very low outside temperatures.
According to the present invention, there is provided a heating unit for installation between a first space and a second space, comprising a control interface for setting a target temperature for the first space, a heat pump for extracting heat energy from the discharging at least**some**oftheextractedheatenergy intothe first space to raise the temperature of the first space towards the target temperature, an auxiliary heating element for discharging additional heat into the first space, and a control unit for controlling the auxiliary heating element to discharge additional heat into the first space if it is determined that the heat pump will or may not be capable of discharging sufficient heat energy into the first space to raise the temperature of the first space to the target temperature, or at least not quickly enough.
The secondary heating element may be or include an electric heating element. The first space may be or be defined at least in pad within the interior of a building, so that the first space comprises air. The first space may comprise a fluid, so that the heat is discharged into the fluid. The second space may be or be defined at least in pad by the exterior of a building, so that the second space comprises air. The second space may comprise a fluid, so that the heat is extracted from the fluid. The second space may comprise pad of the ground, so that the heat is extracted from the ground. Where the first and second spaces comprise air, the heat pump is an cair to air" heat pump.
The control unit may be arranged to operate the auxiliary heating element when a measured temperature of the second space is below a predetermined threshold; by doing so the control unit has effectively determined that the heat pump will not be capable of discharging sufficient heat energy into the first space to raise the temperature of the first space to the target temperature. The control unit may be arranged to operate the auxiliary heating element when a measured temperature of the first space is below a predetermined threshold after a predetermined time period; by doing so the control unit has effectively determined that the heat pump will not be capable of discharging sufficient heat energy into the first space to raise the temperature of the first space to the target temperature quickly enough.
Reference will now be made, by way of example, to the accompany drawing, in which: Figure 1 illustrates a heating unit according to an embodiment of the present invention.
A hybrid heating unit embodying the present invention comprises both a heat pump for extracting heat energy from the outside and discharging at least some of the extracted heat energy to the inside, and an auxiliary heating element, typicafly an electric heating element, for discharging additional heat to the inside. When there are particularly low outside temperatures the hybrid heating unit uses the auxiliary electric heating element (boostelement)*toincreaseits heat*outputand achieve the requiredroomtemperature To optimise the efficiency of the unit it is beneficial to allow the auxiliary boost element to operate only at certain outdoor temperatures and indoor temperatures, or within certain ranges of outdoor temperatures and indoor temperatures. This ensures the operation of the hybrid heating unit is optiniised and the lowest cost energy source for heat (the heat pump) is used as much as possible, whilst still achieving the required room temperature. However, the auxiliary boost element may also be operated outside of those predetermined inside and outside temperature ranges, for example to allow the target indoor temperature to be reached more quickly.
To achieve this, sensors and timing devices can be included to optimise the energy efficiency of the hybrid heating unit, under control of a control unit. 1:.
For example, an outside temperature sensor may be used, with the control unit switching on the auxiliary heating element at or below a predetermined outside temperature (which may be user-programmable), one at which it is considered that the heat pump may not be able to provide sufficient heat output to reach the target temperature.
An indoor temperature sensor may also be used, with the control unit switching on the auxiliary heating element if the heat pump is unable to achieve the target temperature after a predetermined (e.g. user-programmable) time period.
The hybrid heating unit is typically designed to fit inside a building on an external wall, with an incoming airflow and exhaust airflow. The components would typically be arranged to fit into housing similar to a domestic storage heater (e.g. N 770mm W 820 D 300mm). The inflow and exhaust will typically be via 100-120mm holes through the wall.
The control interface for the heating unit would allow the target room temperature to be set, and may aiso allow the predetermined time period described above to be set (either directly or indirectly). The control interface would typically also allow the setting of a programmable timer within the control unit, which is for switching the heating unit or parts thereof on and off at specftic times (as in a conventional heating system).
Therefore, in accordance with an embodiment of the present invention, a heat pump and heating element can provide heating to a required level whilst maximizing the efficiency of the heat pump and therefore reducing CO2 creation. The incorporation of an external temperature sensor and control unit reduces inefficient heating by the heating element. An internal sensor and control unit can ensure that the required temperature is achieved by the most efficient means. Priority for heating would be by way of the heat pump and, if the required heat is not delivered, heating would be augmented by the direct acting heating element. The control mechanisms can ensure the component parts operate in such a way to deliver the required room temperature in the most efficient way, both in terms of reducing cost and reducing carbon creation.
Claims (11)
- Claims 1. A heating unit for installation between a first space and a second space, comprising a control interface for setting a target temperature for the first space, a heat pump for extracting heat energy from the second space and discharging at least some of the extracted heat energy into the first space to raise the temperature of the first space towards the target temperature, an auxiliary heating element for discharging additional heat into the first space, and a control unit for controlling the auxiliary heating element to discharge additional heat into the first space if it is determined that the heat pump will or may not be capable of discharging sufficient heat energy into the first space to raise the temperature of the first space to the target temperature, or at least not quickly enough.
- 2. A heating unit as claimed in claim 1, wherein the secondary heating element is or includes an electric heating element.
- 3. A heating unit as claimed in claim 1 or 2, wherein the first space is or is defined at least in part within the interior of a building, so that the first space comprises air.
- 4. A heating unit as claimed in claim 1, 2 or 3, wherein the first space comprises a fluid, so that the heat is discharged into the fluid.
- 5. A heating unit as claimed in any preceding claim, wherein the second space is or is defined at least in part by the exterior of a building, so that the second space comprises air.
- 6. A heating unit as claimed in claim 5, when dependent on claim 3, wherein the heat pump is an "air to air" heat pump.
- 7. A heating unit as claimed in any preceding claim, wherein the second space comprises a fluid, so that the heat is extracted from the fluid.
- 8. A heating unit as claimed in any preceding claim, wherein the second space comprises part of the ground, so that the heat is extracted from the ground.
- 9. A heating unit as claimed in any preceding claim, wherein the control unit is arranged to operate the auxiliary heating element when a measured temperature of the second space is below a predetermined threshold.
- 10. A heating unit as claimed in any preceding claim, wherein the control unit is arranged to operate the auxiliary heating element when a measured temperature of the first space is below a predetermined threshold after a predetermined time period.
- 11. A heating unit substantially as hereinbefore described with reference to Figure 1 of the accompanying drawings. * * ** 0�*. * * ***w * * S S. S * S* * S *** t
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1016036.4A GB2483896A (en) | 2010-09-24 | 2010-09-24 | Heating unit having a heat pump and an auxiliary heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1016036.4A GB2483896A (en) | 2010-09-24 | 2010-09-24 | Heating unit having a heat pump and an auxiliary heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201016036D0 GB201016036D0 (en) | 2010-11-10 |
| GB2483896A true GB2483896A (en) | 2012-03-28 |
Family
ID=43127867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1016036.4A Withdrawn GB2483896A (en) | 2010-09-24 | 2010-09-24 | Heating unit having a heat pump and an auxiliary heating element |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2483896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305451A (en) * | 2011-07-04 | 2012-01-04 | 徐坚 | Mixed ground source heat pump monitoring system and method based on health assessment technology |
| CN103216883A (en) * | 2013-03-20 | 2013-07-24 | 广西玉林宏江能源科技股份有限公司 | Energy-saving heating air conditioner using gas combustion to compensate insufficient heat of air heat source |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2325000A1 (en) * | 1975-09-16 | 1977-04-15 | Must En Gie | Combined water and electrical convector heater - has heating resistance above water heater body in common housing |
| JPS588940A (en) * | 1981-07-08 | 1983-01-19 | Matsushita Electric Ind Co Ltd | Controller for heat pump type hot water supplier |
| JPS588941A (en) * | 1981-07-08 | 1983-01-19 | Matsushita Electric Ind Co Ltd | Controller for heat pump type hot water supplier |
| US6729390B1 (en) * | 2001-06-01 | 2004-05-04 | Emerson Electric Co. | Control for heat pump with auxiliary heat source |
| WO2007046792A1 (en) * | 2005-10-18 | 2007-04-26 | Carrier Corporation | System and method for control of heat pump operation |
| US20100090017A1 (en) * | 2008-10-11 | 2010-04-15 | Reza Naghshineh | Hybrid heating system and method |
-
2010
- 2010-09-24 GB GB1016036.4A patent/GB2483896A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2325000A1 (en) * | 1975-09-16 | 1977-04-15 | Must En Gie | Combined water and electrical convector heater - has heating resistance above water heater body in common housing |
| JPS588940A (en) * | 1981-07-08 | 1983-01-19 | Matsushita Electric Ind Co Ltd | Controller for heat pump type hot water supplier |
| JPS588941A (en) * | 1981-07-08 | 1983-01-19 | Matsushita Electric Ind Co Ltd | Controller for heat pump type hot water supplier |
| US6729390B1 (en) * | 2001-06-01 | 2004-05-04 | Emerson Electric Co. | Control for heat pump with auxiliary heat source |
| WO2007046792A1 (en) * | 2005-10-18 | 2007-04-26 | Carrier Corporation | System and method for control of heat pump operation |
| US20100090017A1 (en) * | 2008-10-11 | 2010-04-15 | Reza Naghshineh | Hybrid heating system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305451A (en) * | 2011-07-04 | 2012-01-04 | 徐坚 | Mixed ground source heat pump monitoring system and method based on health assessment technology |
| CN103216883A (en) * | 2013-03-20 | 2013-07-24 | 广西玉林宏江能源科技股份有限公司 | Energy-saving heating air conditioner using gas combustion to compensate insufficient heat of air heat source |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201016036D0 (en) | 2010-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |