AT12869U1 - POWER HEAT MACHINE AND METHOD FOR MANUFACTURING THE SAME - Google Patents

Abstract

A power-heat engine (100) is provided having a heat input member (102), a heat rejection member (103), a heat transfer member (107), and a controller (108), the heat input member (102) being driven by a high energy fluid line (111 ) is connected to the heat emitting element (103), wherein the heat emitting element (103) is connected to the heat input member (102) by means of a low energy fluid line (105). Further, the controller (108) is arranged to control the operation of the combined heat and power engine (100) and the heat transfer member (107) is arranged to feed waste heat from the controller (108) into the low energy fluid line (105).

Description

Austrian Patent Office AT 12 869 Ul 2013-01-15

description

POWER HEAT MACHINE AND METHOD FOR MANUFACTURING THE SAME

The invention relates to a power-heat engine, in particular a heat pump or a refrigerator. Furthermore, the invention relates to a method for producing a power-heat engine, in particular a heat pump or a refrigerator.

Various heat pumps, e.g. Compression heat pumps, absorption heat pumps or adsorption heat pumps known. Currently the most popular are the compression heat pumps, where in turn electrically driven compression heat pumps are the most widely used. These have a refrigerant in a closed circuit, which is sucked by means of a compressor, compressed and fed to a condenser or condenser. From the condenser, the liquefied refrigerant is fed to an expansion element, for example an expansion valve. The expanded refrigerant is then fed to an evaporator where it is vaporized and then fed to the compressor again, thus closing the circuit.

In the described cycle, the energy input takes place substantially in the evaporator, in which by means of ambient heat, e.g. via air, gas, water or brine, the heat is supplied to the refrigerant. Further, energy is also supplied in the compressor, in which the temperature level is increased by means of compression of the evaporated refrigerant.

The energy discharge from the cycle or the transfer to another circuit, such as a heating circuit for heating a home, however, takes place in the condenser, in which the heat, which is released by the condensation, is transmitted to the wider circuit.

In the case of electrically operated compression heat pumps, these often have electronic controls or control circuits, which serve in particular to control the compressor, for example, to control or regulate a desired speed of the compressor. These electronic controls reduce, like all accessories, such as pumps, the efficiency of the heat pump and are typically taken into account in the calculation of the so-called coefficient of performance of the heat pump.

In addition, it should be noted that the above statements apply essentially to refrigeration machines, which are based essentially on the same principles of operation, but the cooling effect of the evaporator is used instead of the heating effect of the capacitor.

The invention has for its object to provide a combined heat and power plant and a method for producing the same, wherein the power-heat engine has improved efficiency.

This object is solved by the subject matters of the independent claims. Advantageous embodiments are described in the dependent claims.

According to an exemplary aspect, there is provided a power heat engine having a heat input member, a heat radiating member, a heat transfer member, and a controller, wherein the heat input member is connected to the heat radiating member by a high energy fluid line, the heat radiating member being connected to the radiator by a low energy fluid line Heat input element is connected. Furthermore, the control device is set up to control the operation of the power-heat engine and the heat transfer element is arranged to feed waste heat of the control device into the low energy fluid line.

In particular, the power-heat engine likes a heat pump, e.g. a power controlled heat pump, or a chiller. Examples of heat pumps like 1/10 Austrian Patent Office AT 12 869 Ul 2013-01-15

Gas / gas heat pumps, e.g. Air / air heat pumps, gas / liquid heat pumps, e.g. Air / water heat pumps, or liquid / liquid heat pumps, e.g. Brine / water heat pumps and water / water heat pumps.

In the context of the application may be understood by the term "controller ™ in particular any device, component or element, by means of which or which an influence on the operation or the function of the power-heat engine can be taken. This influence can be done, for example, by a direct or indirect control of the heat input element, the heat radiating element or other elements of the power-heat engine.

For the purposes of this application, the term "low energy fluid line" may be used. Each conduit or section of a circuit through which a fluid flows, followed by, e.g. in the transition to a high energy fluid line, still more energy is supplied. In particular, therefore, fluid with different energy or enthalpy contents may flow or flow in different sections of the low-energy fluid line.

[0013] According to another exemplary aspect, there is provided a method of manufacturing a cogeneration machine having a heat input member, a heat release member, a heat transfer member, and a controller configured to operate the cogeneration machine controlling, the method comprising: connecting the heat input element by means of a high energy fluid line with the Wärmeaus-tragelelement, connecting the Wärmeaustragementsement means of a Niedereergiefluidleitung with the heat input element and thermal coupling of the control device and the Niedereergiefluidleitung means of the heat transfer element.

A power-heat engine according to an exemplary aspect may in particular have an increased efficiency, since in addition to the entry on the heat input member waste heat of the control device is used to heat a working fluid or refrigerant in the power-heat engine. In particular, in the case of a heat pump thus the overall efficiency is increased. Furthermore, the dissipation of the waste heat of the control device possibly causes a better cooling or temperature control of the control device, for example of electronic components of the control device. Thus, possibly the life of such a control device or at least parts or components thereof can be increased. It may also be possible that the efficiency of the control device and thus of the entire power / heat engine is improved by improved cooling or maintaining a favorable temperature range. This may not only be true for a heat pump but also for a chiller.

The use of such a heat transfer element for dissipating waste heat of the control device may have the advantage over the use of cooling fins, in particular, that no additional fan is required for heat dissipation in the cooling fins, so that energy and costs can be saved. In the case of heat pumps, the efficiency may be further increased by utilizing the waste heat. Compared with a direct attachment of the control device or parts of the control electronics to cool or cold elements of the power-heat engine, the indirect coupling via the heat transfer element may have the advantage that this possibly prevents supercooling, which possibly leads to condensation on the supercooled components to be like.

In summary, a described aspect can be seen in that a power-heat engine is provided which has a control device, the waste heat can be coupled by means of a heat transfer element in a low-energy branch of a circuit of a coolant of the power-heat engine. In this way, on the one hand, an efficient cooling of the control device may be made possible, since by means of such a heat transfer element a relatively predeterminable or predetermined cooling is made possible, so that possibly an improved efficiency of the control device is made possible. 2/10 Austrian Patent Office AT 12 869 U1 2013-01-15

On the other hand, such a heat transfer member may also increase the efficiency of the power-heat engine, especially in the case where the power-heat engine is a heat pump.

Hereinafter, exemplary embodiments will be described. It should be noted that embodiments will be described with reference to different objects. In particular, some embodiments with device claims and other embodiments with method claims are described. However, it will be readily apparent to those skilled in the art upon reading this application that, unless explicitly stated otherwise, in addition to a combination of features described in connection with a type of article, any combination of features disclosed in U.S. Pat Be described in connection with different types of objects.

According to another exemplary embodiment of the power-heat engine, the power-heat engine is a compression-power-heat engine.

Alternatively, the power-heat engine may be an absorption power-heat engine or an adsorption power-heat engine.

According to another exemplary embodiment of the power-heat engine, the heat input member is a compressor.

In particular, the compressor may like an electric compressor, i. be electrically powered compressor. Alternatively, however, the compressor may also be driven directly by an internal combustion engine, for example gas or oil. Further, the power-heat engine may include an expansion element, such as an expansion valve or a throttle, disposed between the heat-releasing member and the heat-input member in the low-energy fluid conduit.

According to another exemplary embodiment, the combined heat and power engine further includes an additional heat input element which is coupled into the low energy fluid line. In particular, the additional heat input element may be an evaporator.

According to another exemplary embodiment, the heat transfer element between the additional heat input element and the heat input element is thermally coupled to the low energy fluid line.

In particular, the heat transfer element may thus be connected or coupled between an evaporator and a compressor of a compression-power-heat engine to a suction line or a suction pipe of the power-heat engine. In this way, the already evaporated at a low temperature level coolant may be additionally heated by the waste heat of the controller before it is subsequently brought by the compressor to a higher temperature level.

According to another exemplary embodiment of the power-heat engine, the heat transfer element has a heat pipe.

In particular, the heat transfer element may have a plurality of heat pipes or heat pipes. For example, the number of heat pipes may be adapted to the waste heat produced by the control device. The number may thus be dimensioned such that sufficient cooling of the control device is ensured. Alternatively or in addition to the heat pipe, the heat transfer element may have other active or passive cooling elements, for example water-based simple cooling lines. The use of heat pipes may in particular have the advantage that such heat pipes have a simple structure and require no additional elements, whereby the cost of maintenance and service may be minimized. They also provide an efficient way of transporting heat.

According to a further exemplary embodiment of the power-heat-engine, the control device has power electronics at the Austrian Patent Office AT12 869U1 2013-01-15.

The term power electronics may in particular be understood to mean an electronic device or an electronic component which serves for the conversion of electrical energy. Examples of power electronics may be frequency converters, rectifiers, inverters but also drives of synchronous motors.

According to a further exemplary embodiment of the power-heat engine, the power electronics and / or the control device is arranged in a housing.

According to a further exemplary embodiment of the power-heat engine, the housing has a housing plate, which is adapted to that the heat transfer element can be coupled to the housing plate.

In particular, the housing plate may be a flat and / or smooth plate. That the housing plate may in particular be free of ribs. In particular, by providing such a smooth plate as a coupling surface, the heat transfer member may be coupled in a simple and efficient manner, as well as allowing good heat transfer between the control means and the heat transfer member.

In summary, a specific exemplary embodiment may provide a combined heat and power engine, such as a compression heat pump, which includes a first heat input element, such as an evaporator which vaporizes a refrigerant in a low energy fluid line, and a second heat input element, such as a compressor or compressor. having. Further, the Niederenergiefluidleitung is coupled to a heat transfer element, such as a heat pipe, which supplies the Niederenergiefluidleitung waste heat of a control device. In the case of a compression heat pump, for example, the waste heat may be present in the region of the so-called suction gas line, i. be supplied to the portion of the Niedereergiefluidleitung between the evaporator and the compressor. After the compressor, the refrigerant is in a high energy form, i. it has a higher temperature, before and is called via a high energy fluid line, in the case of a compression heat pump and hot gas line, a heat transfer element, e.g. a capacitor, fed. In this heat-emitting element, in the case of a compression heat pump, the heat energy is delivered to a working medium, for example a heating circuit of a housing heater. After the heat release element, in turn, the energy of the coolant, i. this has a lower temperature. In the case of a compression heat pump, the coolant is then fed to the evaporator via an expansion valve or a throttle again.

In the case of a compression heat pump with electrically driven compressor, the control means may form or comprise a so-called inverter, and in particular power electronics, e.g. have a frequency converter. In particular, the heat transfer element, such as a heat pipe, may be configured to remove the waste heat from the power electronics, e.g. of the frequency converter, and thus to cool this and on the other hand to deliver the heat energy to the refrigerant circuit of the compression heat pump.

In particular, such a compression heat pump may have at least some of the following advantages over known compression heat pumps: It may increase efficiency by introducing or introducing waste heat or power loss of the control means, e.g. a frequency converter, come. Typical frequency converters have a power dissipation on the order of about 5% of the electrical power consumption, of which possibly at least a certain proportion can be introduced into the coolant circuit.

By using a heat transfer element, e.g. one or more heat pipes or heatpipes, even at strongly fluctuating suction gas temperatures of -25 ° C to + 5 ° C, a relatively constant temperature at the control means, e.g. a power electronics of the same, set. In particular, therefore, a relatively constant temperature may be achieved because such heat pipes essentially provide a predetermined heat transfer. In contrast, in the case of a direct coupling or flanging of the power electronics to a suction gas line, as is known in the prior art, under certain circumstances a supercooling and thus condensation of atmospheric moisture on the power electronics can occur. Whereas it may occur in a known in the art coupling the power electronics to a heating circuit to overheat the power electronics.

In the event that a simple plate is provided as a thermal coupling between the power electronics and the heat transfer element, this can lead to a cost reduction compared to systems in which, for example, cooling fins are provided.

+ It may also be possible to make the cooling of the control device, or the power electronics or the inverter, in the optimal operating point. In particular, there may be no difference between heating, cooling or defrosting the heat pump.

+ It may be possible to increase the life of the electronic components.

In the event that the heat transfer element is coupled to the suction gas line, a safety overheating of the coolant may be possible in the suction gas line, whereby an unintentionally too low temperature of the coolant and thus a possible condensation of the same is prevented before the compressor.

Further advantages and features of the present invention will become apparent from the following exemplary description of presently preferred embodiments. The individual figures of the drawing of this application are merely to be regarded as schematic.

FIG. 1 shows a schematic block diagram of a compression heat pump according to an exemplary embodiment.

FIG. 2 shows a schematic representation of a detail of the compression heat pump of FIG. 1.

It should be noted that features or components of different embodiments, which are the same or at least functionally identical with the corresponding features or components of the embodiment, are provided with the same reference numerals or a reference numeral, which is only in his first digit from the reference number of a (functionally) corresponding feature or a (functionally) corresponding component. In order to avoid unnecessary repetitions, features or components already explained on the basis of a previously described embodiment will not be explained in detail later.

FIG. 1 shows a schematic block diagram of a compression heat pump 100 according to an exemplary embodiment. In particular, the compression heat pump 100 includes an evaporator 101, a compressor 102, a condenser 103 and an expansion element 104, e.g. an expansion valve or throttle. The evaporator 101, which constitutes a heat input element, is coupled to the compressor 102 by means of a low energy fluid line or suction gas line 105, which also constitutes a heat input element. An output of the compressor 102 is formed by a high energy fluid line or hot gas line 111, which forwards the refrigerant or working fluid of the compression heat pump 100 to the condenser 103. There, the gaseous refrigerant releases its energy to a secondary circuit, for example a heating circuit of a residential heating system, which is indicated schematically by the line 112. The condensed refrigerant is passed via a further part of the low-energy fluid line 105 via the expansion valve 104 back to the evaporator 101, in which it is evaporated again by supplying thermal energy. The energy supply can in this case by a gas, for example, the ambient air, go from equip or by means of a fluid circuit in which, for example, a brine acts as a working medium and which is indicated schematically by the line 113/10 Austrian Patent Office AT12 869U1 2013-01-15. In the case that ambient air is used, a specific pipe to supply to the evaporator is not always necessary. It may be sufficient to provide a free channel by means of which the evaporator 101, the ambient air can be supplied.

It will also be apparent to those skilled in the art, in connection with FIG. 1, that the term "low energy fluid line " only in contrast to the term "high energy fluid line". it should be understood that the fluid is not in the full range of "low energy fluid line". is at a low energy level but has already received some and possibly most of its energy in this area. However, it is at a lower energy level than it is after the compressor 102, so that the portion of the circuit between the compressor 102 and the condenser 103 can be considered as a high energy fluid line.

In the section of the suction gas line 105 between the evaporator 101 and the compressor 102, an adapter 106 is fixed, e.g. flanged so that a good heat transfer from the adapter to the suction gas line 105 is made possible. Thus, the adapter 106 can serve as a mounting option for a heat transfer element 107, which is designed for example as a heat pipe or heat pipe. The heat transfer element 107 may in this case have a single heat pipe or a plurality of heat pipes. Alternatively, the heat transfer element may also be a simple circulation of cooling fluid, for example water. In the case where a heat pipe is used as the heat transfer member, for example, ammonia or water may be used as the heat pipe medium or refrigerant.

While one end of the heat pipe 107 is thermally coupled to the suction pipe by means of the adapter 106, the other end of the heat pipe 107 is coupled to a controller 108 of the compression heat pump 100. In particular, the heat pipe may be attached to a flat base or base plate of the controller or inverter and thermally coupled. The heat pipe thus on the one hand enables effective cooling of the control device 108 and on the other hand increases the heat input into the coolant circuit of the heat pump. In particular, the heat pipe may be thermally coupled to the control device such that a good heat transfer of power electronic components, for example a frequency converter, of the control device 108 is ensured.

Further, the control device 108 is still coupled to an electrical power source with an electrical supply line 109 and has as an output to an electrical connection 110, which is coupled to the compressor 102 and whose supply of electrical energy is used. Thus, the controller 108 may control the compressor 102, and thus the entire compression heat pump 100.

Depending on the field of application of the heat pump, all known working media such as, for example, fluorohydrocarbons, CO 2, ammonia, water, propane, butane or propylene can be used as the refrigerant of the compression heat pump.

Figure 2 shows a schematic representation of a detail of the compression heat pump 100 of Figure 1. In particular, Figure 2 shows the mechanical and thermal coupling of the controller 108 or the inverter, which is arranged in a housing, on the suction line 105. The housing of the inverter has a flat or planar housing or base plate 214. The housing plate is preferably formed from a good thermally conductive material, such as a metal. In a part of the housing plate or an extra part of the base plate openings are made, in which a heat pipe or a plurality of heat pipes 107 can be inserted. These lead to the adapter 106, which is designed as a flange on the suction pipe or the low-energy fluid line 105. In the adapter, in turn, a plurality of openings are formed, in which on the one hand, the heat pipes 107 can be inserted and on the other hand, the suction line 105 is passed. In this case, the adapter is preferably arranged with respect to the control device 108 or the inverter in such a way that it engages with respect to gravity above the housing plate

Claims (9)

Austrian Patent Office AT 12 869 Ul 2013-01-15 is assigned, so that the movement of the working fluid in the heat pipes is supported by gravity. Alternatively, however, the heat pipes may be arranged in a horizontal orientation or in any orientation with respect to gravity. In addition, it should be noted that "having " does not exclude other elements or steps and "a " or "a " no multiplicity excludes. It should also be understood that features or steps described with reference to any of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limiting. REFERENCE LIST 100 Compression heat pump 101 Heat input element / evaporator 102 Heat input element / compressor 103 Heat rejection element / condenser 104 Expansion valve 105 Low energy fluid line / suction line 106 Adapter 107 Heat transfer element 108 Control device 109 Electrical supply line 110 Electrical connection 111 High energy fluid line / hot gas line 112 Heating circuit 113 Line / channel 214 Housing plate Claims 1. Force A heat machine (100) comprising: a heat input member (102), a heat discharge member (103), a heat transfer member (107), and a controller (108), wherein the heat input member (102) is coupled to the high energy fluid line (111) Heat discharge element (103), wherein the heat discharge element (103) is connected to the heat input member (102) by means of a low energy fluid line (105); wherein the control device (108) is arranged to control the operation of the power-heat engine (100); wherein the heat transfer element (107) is arranged to inject waste heat from the controller (108) into the low energy fluid line (105). The combined heat and power engine (100) of claim 1, wherein the combined heat and power engine (100) is a compression-power-heat engine. A combined heat and power engine (100) according to claim 2, wherein the heat input member is a compressor (102). 4. The combined heat and power engine of claim 1, further comprising: an additional heat input member coupled to the low energy fluid line. 7/10 Austrian Patent Office AT 12 869 Ul 2013-01-15 The combined heat and power engine (100) of claim 4, wherein the heat transfer member (107) is thermally coupled to the low energy fluid line (105) between the additional heat input member (101) and the heat input member (102). A combined heat and power engine (100) according to any one of claims 1 to 5, wherein the heat transfer member (107) comprises a heat pipe. 7. Combined heat and power engine (100) according to one of claims 1 to 6, wherein the control device (108) comprises power electronics. 8. Combined heat and power engine (100) according to claim 7, wherein the power electronics and / or the control device is arranged in a housing. 9. A combined heat and power engine (100) according to claim 8, wherein the housing has a housing plate (214) adapted to be coupled to the heat transfer member (107) to the housing plate (214). For this 2 sheet drawings 8/10