WO2024022970A1

WO2024022970A1 - Heating system

Info

Publication number: WO2024022970A1
Application number: PCT/EP2023/070273
Authority: WO
Inventors: Jaser MUSHKOLAJ
Original assignee: Anvitec Ag
Priority date: 2022-07-29
Filing date: 2023-07-21
Publication date: 2024-02-01
Also published as: CH719940A1

Abstract

The invention relates to a heating system (10) for heating heating water. The heating system (10) has a first heating device (6) and a second heating device (7), wherein the second heating device (7) is connected to the first heating device (6) in series and is arranged downstream thereof. The first heating device (7) heats the heating water to a first temperature level (T1), and the second heating device (7) heats the heating water to a second temperature level (T2), the second temperature level (T2) lying above the first temperature level (T1).

Description

DESCRIPTION

title

HEATING SYSTEM

Technical area

[0001] The invention relates to a heating system according to the preamble of independent claim 1.

[0002] It is generally known that hot water production can account for up to 30% of the total heat and energy requirements of a household in Switzerland, i.e. at least for single-family homes with Minergie standards. In old buildings, the energy requirement for hot water preparation still accounts for around 10 to 20%. Especially in summer, many heaters only heat to provide constant warm water. Hot water or drinking water is primarily used in the household for washing, showering and bathing. This water has no contact with the water in the heating pipes.

[0003] With regard to possible cost savings and environmental protection aspects, the question always arises as to how hot water is actually provided via the heating system and what advantageous options and alternatives there are to provide hot water with less energy.

[0004] Just as there are many different types of heating, there are also different ways to provide hot water for a household. If, for example, central heating with heating oil or gas is used in a house, hot water can be produced directly using the continuous process or with an intermediate hot water storage tank. In order to save heating costs, a central heating system with a hot water storage tank can always be supplemented with a heat pump or a solar thermal system. As an alternative to the large central heating system, there are, however, even smaller devices that are used as a central system for hot water preparation, such as heat pump boilers, instantaneous water heaters or electric boilers.

[0006] An instantaneous water heater is a water heater that works according to the instantaneous principle. This means that only when there is demand is the freshly tapped cold water passed through the built-in heating coils in the instantaneous water heater, whereby it heats up as it flows. Instantaneous water heaters make it possible to provide warm water in a household as needed. Compared to other water heaters, the devices do not have a storage tank.

An electric boiler usually includes a compact, insulated storage tank with an integrated heating cartridge. The latter converts electrical energy into thermal energy, which it then transfers to the water in the storage tank. With electric boilers the water can be heated almost to the boiling point. Electric boilers are generally considered to be devices with a relatively high power consumption, but they can be combined with systems based on renewable energy.

A heat pump boiler works in principle like a heat pump or like an air heat pump. Heat is removed from the environment, which is then used with the help of a refrigerant to heat water. A heat pump heats heating water and hot water, the heat pump boiler only heats the hot water that comes from the pipe. Therefore, in connection with heat pump boilers, a hot water heat pump is often referred to. With a heat pump boiler, air is sucked in using a fan and used to heat a refrigerant. A compressor compresses this refrigerant, causing its temperature to rise further. A heat exchanger then ensures that the heat is transferred to the water in the storage tank.

As a rule, a heat pump boiler is set up so that it uses the already heated exhaust air from the heating room. But there are also domestic water heat pumps that use the used exhaust air from the living area and can thus be used for controlled apartment ventilation. When purchasing, it should be taken into account whether the system is designed for exhaust air, mixed air or even outside air. The advantage of heat pump boilers is that: Hot water preparation can take place separately from an existing heating system and is more cost-effective because no fuel has to be purchased.

State of the art

[0010] CH 717 616 A2 describes a method for heating water using heat pumps. Here, two or more heat pump boilers or boiler areas with large heat exchangers for heat pumps connected in series on the domestic water side are used. The process thereby separates cold water and hot water areas, heats the boilers individually or in groups using the heat pump and can thus achieve an increase in effectiveness.

However, it is disadvantageous that with the known heat pump heating systems maximum water temperatures of 48 ° C to 52 ° C can be achieved, which is often not sufficient for heating purposes, especially in winter weather conditions.

It is therefore the object of the present invention to provide a heating system by means of which a higher temperature for heating water, i.e. specifically for heating purposes, can be provided in an energetically efficient manner and with relatively low installation costs.

Presentation of the invention

[0013] According to the invention, the object is achieved by a solution as defined in independent claim 1.

The essence of the invention is as follows: a heating system for heating heating water, in particular for a property, with a first heating device and with a second heating device, the second heating device being connected in series with the first heating device and arranged downstream of it. The first heating device heats the heating water to a first temperature level and the second heating device heats the heating water to a second temperature level, the second temperature level being above the first temperature level.

[0015] The term “heating device” refers here to a device for heating heating water in a house or a property, which can also include several houses, which can be used separately, in addition to or as a replacement for existing heating systems and which preferably also have a storage volume.

[0016] In the present case, the term “temperature level” refers to the target range of the respective heating device for the water temperature. Accordingly, the formulation according to which the second temperature level is above the first temperature level refers to the fact that the lower limit of the target range according to the second temperature level is above the upper limit of the target range according to the first temperature level. The first and second heating devices are designed in particular for different temperature ranges.

Preferably, the first heating device comprises a heat pump boiler. Heat pump boilers work very efficiently with little electricity and cause significantly less noise emissions than conventional heat pumps because no air has to be sucked in from outside.

[0018] Preferably, the second heating device comprises an electric boiler. Particularly in combination with a heat pump boiler, a particularly inexpensive and efficient heating system can be created, which requires an average consumption of around 1 kW/h, whereas conventional heat pump heating systems have an average consumption of around 4 kW/h. In principle, the use of an instantaneous water heater as a second heating device is also conceivable.

[0019] Preferably, the first temperature level to which the first heating device heats the heating water is from approximately 45 ° C to approximately 55 ° C. In this way, particularly when using a heat pump boiler as the first heating device, the first stage of the heating system according to the invention can be achieved with a particularly high degree of efficiency.

[0020] Preferably, the second temperature level to which the second heating device heats the heating water is from approximately 70 ° C to approximately 80 ° C. In this way, particularly when using an electric boiler as the second heating device, the second stage of the heating system according to the invention with a relatively short heating time and a relatively low energy consumption.

[0021] Preferably, a storage container (in particular a storage tank) is arranged downstream of and connected in series with the second heating device, in which heated heating water with essentially the second temperature level is received (i.e. from the second heating device or from the electric boiler). In this way, the more cost-effective heat pump boiler can be used optimally. In principle, there is also the possibility that a further storage container(s) is/are connected to the first storage container. Furthermore, several such series-connected heating systems can be installed in one property.

An expansion vessel is preferably arranged upstream of the first heating device. This means that pressure fluctuations within the heating system can be reliably compensated for.

Preferably, the expansion vessel is connected in parallel to the heating water return. In this way, the aforementioned pressure equalization can be achieved particularly effectively.

Preferably, a pressure gauge and a safety valve are arranged downstream of the first heating device and preferably upstream of the second heating device. This can effectively prevent damage to the system, such as pipes and fittings bursting. In principle, the safety valve and the pressure gauge can also be installed in other parts of the system (for example in the heating water return), since the pressure in the system is essentially the same everywhere. The response pressure of the safety valve is around 2.5 bar to around 3.0 bar for single and two-family houses.

A circulation pump is preferably arranged downstream of the second heating device. The heating water circuit is maintained using the circulation pump. In addition, the circulation pump prevents the water in the pipe from cooling down by pumping it regularly. Alternatively, the circulation pump is arranged downstream of the storage tank, which brings the heated water from the storage tank into the flow or into the heating water circuit.

A thermostat is preferably arranged downstream of the circulation pump. The thermostat is used to regulate the flow rate of the heating water and a specific value for the room temperature (e.g. 20° C).

The first heating device and the second heating device each have a volume for holding the heating water or heating medium to be heated or for storing the heated heating water or heating medium. This storage volume or storage volume (here also referred to as volume) is advantageously dimensioned to suit the property to be heated.

Preferably, the first heating device has a volume in a range from approximately 200 liters to approximately 400 liters and in particular approximately 300 liters. The second heating device also preferably has a volume in a range from approximately 200 liters to approximately 400 liters and in particular approximately 300 liters. In addition, the storage container also preferably has a volume in a range from approximately 200 liters to approximately 400 liters and in particular approximately 300 liters. These sizes have proven to be particularly effective for use in a heating system, especially for single or two-family homes. For larger properties, the volumes can also be larger or several first and/or second heating devices or storage containers can be combined.

Preferably, the second heating device is coupled to a system based on a renewable energy source, in particular a solar system or a wind turbine. As a result, the energy efficiency of the entire system can be further increased, particularly when using an electric boiler as a second heating device.

Brief description of the drawings Further advantageous embodiments of the invention result from the following description of an exemplary embodiment of the invention with the aid of the schematic drawing. In particular, the heating system according to the invention will be described in more detail below with reference to the accompanying drawing using an exemplary embodiment. Show it:

Fig. 1: a schematic representation of an exemplary embodiment of a heating system according to the invention; and

Fig. 2 is a schematic representation of a preferred embodiment of the heating system according to the invention.

Way(s) for carrying out the invention

Certain terms are used in the following description for convenience and are not intended to be limiting. The words "right", "left", "bottom" and "top" indicate directions in the drawing to which reference is made. The terms "inward", "outward", "below", "above", "left", "right" or similar are used to describe the arrangement of designated parts relative to one another, the movement of designated parts relative to one another, and the directions toward or away from geometric center of the invention and named parts thereof as shown in the figures. These spatial relative information also include positions and orientations other than those shown in the figures. For example, when a part shown in the figures is turned over, elements or features described as "below" are then "above". The terminology includes the words expressly mentioned above, derivatives thereof and words of similar meaning.

In order to avoid repetition in the figures and the associated description of the various aspects and exemplary embodiments, certain features should be understood as being common to various aspects and exemplary embodiments. The omission of an aspect in the description or a figure does not imply that this aspect is missing in the associated exemplary embodiment. Rather, such an omission may serve to provide clarity and prevent repetition. In this context, the following definition applies to the entire further description: Are in a figure for the purpose If there are reference symbols for graphical clarity, but are not mentioned in the directly associated description text, reference is made to their explanation in the previous descriptions of the figures. If reference symbols that are not included in the corresponding figure are also mentioned in the description text that directly belongs to a figure, reference is made to the preceding and following figures. Similar reference numbers in two or more figures represent similar or identical elements.

1 shows a schematic view of an exemplary embodiment of the heating system 10 according to the invention. Here, driven by a circulation pump 3, cool heating water flows via the return line 8 to the heat pump boiler 6. In the heat pump boiler 6, the heating water is heated to a first temperature level T1, which is between approximately 45 ° C and approximately 55 ° C. From the heat pump boiler 6, the heating water heated in this way reaches the electric boiler 7, where it is heated to a second temperature level T2, which is between approximately 70 ° C and approximately 80 ° C. The corresponding temperatures can be monitored using suitable sensors (not shown).

In this exemplary embodiment, a safety valve 2 with a pressure gauge 5 is arranged between the heat pump boiler 6 and the electric boiler 7. However, the safety valve can also be provided at another position in the heating system 10, such as in the return line 8, since the pressure in the heating system 10 is essentially the same everywhere.

From the electric boiler 7, the now completely heated heating water is conducted by means of the circulation pump 3 via the flow 9 to the radiators, where it can release its heat accordingly. The flow rate or the corresponding room temperature is regulated using a thermostat 4.

An expansion vessel 1 is connected parallel to the return line 8 and connected to the heat pump boiler, which helps to compensate for any pressure fluctuations in the heating system 10.

[0038] Electricity can be provided to the electric boiler 7 in a cost-efficient and environmentally friendly manner via the solar system 11 shown here as an example become. However, other systems based on renewable energy sources, such as wind turbines, can also be used to supply the electric boiler with electricity.

2 shows a schematic view of a preferred embodiment of the heating system 10 according to the invention. Here, driven by the circulation pump 3, cool heating water flows via the return line 8 first to the heat pump boiler 6. In the heat pump boiler 6, the heating water is brought to a first temperature level T1 heated, which is between about 45° C and about 55° C. From the heat pump boiler 6, the heating water heated in this way flows into the electric boiler 7, where it is heated to a second temperature level T2, which is between approximately 70 ° C and approximately 80 ° C. The corresponding temperatures can be monitored using suitable sensors (not shown here).

In this exemplary embodiment, a safety valve 2 with a pressure gauge 5 is also arranged between the heat pump boiler 6 and the electric boiler 7. However, the safety valve can also be provided at another position in the heating system 10, such as in the return line 8, since the pressure in the heating system 10 is essentially the same everywhere.

In this embodiment, the fully heated heating water is transferred from the electric boiler 7 to a storage container 12, where the temperature level T2 is essentially maintained from approximately 70 ° C to approximately 80 ° C, since the storage container (or storage tank) has a has appropriate insulation. In this embodiment, approximately twice the amount of heated heating water is available than in the embodiment according to FIG. 1 (since the heat pump boiler 6 again supplies the electric boiler 7 with water at the temperature level T1 and the electric boiler 7 in turn heats it up to the temperature level T2 ), so that the more cost-effective heat pump boiler 6 can be used optimally. In principle, there is also the possibility that another or more storage containers are/are connected to the first storage container 12.

From the storage container 12, the water is then conducted by means of the circulation pump 3 via the flow 9 to the radiators, where it receives its heat can submit accordingly. The flow rate or the corresponding room temperature is regulated using a thermostat 4.

[0044] Electricity can in turn be provided to the electric boiler 7 in a cost-efficient and environmentally friendly manner via the solar system 11. However, other systems based on renewable energy sources, such as wind turbines, can also be used to supply the electric boiler with electricity.

The heating system according to the invention has the advantages summarized below, particularly in comparison with conventional heat pump heating systems. On the one hand, no official approval is required and the installation is relatively simple and therefore inexpensive, whereas conventional heat pump heating systems require more installation effort and approximately twice as high investment costs. In addition, with the heating system according to the invention, heating water can be heated up to 80 ° C with an average power consumption of 1 kW/h and also independently of the outside temperature. The heating system according to the invention is suitable for all radiators or radiators and, in particular, does not cause any noise emissions to the outside, whereas conventional heat pump heating systems are not suitable for all radiators or radiators and produce a high noise level outside, especially in winter; In addition, conventional heat pump heating systems can only regularly achieve temperatures of 48 ° C to 52 ° C, with an average power consumption of around 4 kW / h. In addition, with the heating system according to the invention, the individual devices can be replaced and there is no need for an exhaust gas control or a chimney sweep. The maintenance costs are correspondingly low. The delivery times for the individual devices are also shorter than is the case with conventional heat pump heating systems. Finally, the heating system according to the invention offers a CO2-neutral and climate-friendly solution. List of reference symbols:

1 expansion vessel

2 safety valve

3 circulation pump

4 thermostat

5 pressure gauges

6 heat pump boilers (300 l)

7 electric boilers (300 l)

8 return

9 forward

10 heating system

11 solar system

12 storage containers (storage tank)

T1 first temperature level

T2 second temperature level

Claims

EXPECTATIONS

Claim 1: Heating system (10) for heating heating water with a first heating device (6) and with a second heating device (7), the second heating device (7) being connected in series with the first heating device (6) and arranged downstream of it , characterized in that the first heating device (7) heats the heating water to a first temperature level (T1) and the second heating device (7) heats the heating water to a second temperature level (T2), the second temperature level (T2) being above the first temperature level (T1).

Claim 2: Heating system (10) according to claim 1, wherein the first

Heating device (6) comprises a heat pump boiler.

Claim s: Heating system (10) according to claim 1 or 2, wherein the second

Heating device (7) comprises an electric boiler.

Claim 4: Heating system (10) according to one of the preceding claims, wherein a storage container (12) is arranged downstream of and connected in series with the second heating device (7), in which heated heating water is essentially with the second

Temperature level (T2) is recorded.

Claim s: Heating system (10) according to one of the preceding claims, wherein the first temperature level (T1), to which the first heating device (6) heats the heating water, is from approximately 45° C to approximately 55° C. Claims: Heating system (10) according to one of the preceding claims, wherein the second temperature level (T2) to which the second heating device (7) heats the heating water is from approximately 70° C to approximately 80° C.

Claim 7: Heating system (10) according to one of the preceding claims, wherein an expansion vessel (1) is arranged upstream of the first heating device (6).

Claim s: Heating system (10) according to claim 7, wherein the expansion vessel (1) is connected in parallel to the heating water return (8).

Claim 9: Heating system (10) according to one of the preceding claims, wherein a pressure gauge (5) and a safety valve (2) are arranged downstream of the first heating device (6), and preferably upstream of the second heating device (7).

Claim 10: Heating system (10) according to one of the preceding claims, wherein downstream of the second heating device (7).

Circulation pump (3) is arranged.

Claim 11: Heating system (10) according to one of claims 1 to 9, wherein a circulation pump (3) is arranged downstream of the storage container (7).

Claim 12: Heating system (10) according to claim 10 or 11, wherein a thermostat (4) is arranged downstream of the circulation pump (3).

Claim 13: Heating system (10) according to one of the preceding claims, wherein the first heating device (6) has a volume in a range from approximately 200 liters to approximately 400 liters and in particular approximately 300 liters.

Claim 14: Heating system (10) according to one of the preceding claims, wherein the second heating device (7) has a volume in a range from approximately 200 liters to approximately 400 liters and in particular approximately 300 liters. Claim 15: Heating system (10) according to one of the preceding claims, wherein the storage container (6) has a volume in a range from approximately 200 liters to approximately 400 liters and in particular from approximately 300 liters.

Claim 16: Heating system (10) according to one of the preceding claims, wherein the second heating device (7) is coupled to a system (11) based on a renewable energy source, in particular a solar system or a wind turbine.