Energy-saving displacement heat exchanger

Abstract

The invention relates to the technical field of displacement heat exchangers, in particular to an energy-saving displacement heat exchanger which comprises a tank body and a layered structure. The interlayer plate is used for dividing the internal space of the tank body into different layers, and the inlet and outlet of each layer is connected with the tank body and is used for realizing inlet and outlet control of fluid of different layers; the device comprises a heat exchange element, a tube plate box, a flow guide structure and a control mechanism, the data analysis unit is used for determining the working peak time period of the heat exchanger and the dispersion degree of the working peak time period so as to determine the working mode of the heat exchanger; the control unit is used for determining whether to start a lower-layer collaborative water supply mode; the control unit is used for determining whether to adjust working process parameters of the heat exchanger; by improving the accuracy of analyzing the working mode of the energy-saving displacement heat exchanger, the accuracy of controlling the working process of the energy-saving displacement heat exchanger is improved, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of volumetric heat exchangers, in particular to an energy-saving volumetric heat exchanger. Background Art

[0002] With the continuous development of industry, the demand for heat exchange in various industries continues to increase. For example, in the chemical, pharmaceutical, food processing and other industries, a large number of heat exchange equipment are needed to meet the heating, cooling, evaporation, condensation and other process requirements in the production process. Traditional heat exchangers consume a lot of energy while meeting these needs. This has prompted people to seek more energy-saving heat exchange solutions. Traditional volumetric heat exchangers often consume excessive energy during operation due to the lack of effective energy-saving control measures.

[0003] Chinese patent application publication number: CN113465411 B discloses a volumetric heat exchanger, including a tank body having a first cavity and a first outlet, and a first heating mechanism and a second heating mechanism having the same structure, the first heating mechanism and the second heating mechanism are evenly arranged along the circumference of the tank body, both have a second cavity, the second cavity is connected to the first cavity, both include a main body arranged on the tank body, a baffle arranged in the first cavity, a heating coil arranged in the second cavity, abutting on the baffle, having a second inlet and a second outlet, a first baffle plate arranged at the entrance of the second cavity through a fastener, having a first inlet, and the second inlet and the second outlet pass through the first baffle plate. Through the above technical solution, the problem of maintaining the temperature stability of the flue gas before entering the SCR reactor in the prior art is solved.

[0004] It can be seen that the existing technology has the problem of low accuracy in analyzing the working mode of the energy-saving volumetric heat exchanger, which leads to poor accuracy in controlling the working process of the energy-saving volumetric heat exchanger and causes waste of resources. Summary of the invention

[0005] To this end, the present invention provides an energy-saving volumetric heat exchanger to overcome the problem in the prior art that the low accuracy of the analysis of the working mode of the energy-saving volumetric heat exchanger leads to poor accuracy of the working process control of the energy-saving volumetric heat exchanger and causes waste of resources.

[0006] To achieve the above object, the present invention provides an energy-saving volumetric heat exchanger, comprising:

[0007] The tank body includes a shell for accommodating the internal heat exchange structure and fluid and a head located at both ends of the tank body for sealing the tank body;

[0008] A layered structure, comprising a partition plate connected to the shell to divide the internal space of the tank into different layers, and inlets and outlets of each layer connected to the tank to control the inlet and outlet of fluids in different layers;

[0009] A heat exchange element connected to the barrier plate, comprising a coil for realizing fluid circulation and a heat exchange plate for accelerating the heat exchange rate;

[0010] A tube sheet box, which is connected to the tank body and is used to fix the heat exchange element;

[0011] A flow guiding structure, comprising a flow guiding plate connected to the tank body for guiding the flow direction of the fluid and a flow guiding pipe for controlling the flow speed of the fluid;

[0012] A control mechanism, which is respectively connected to the layered structure and the flow guiding structure, includes a data acquisition unit for acquiring historical heating data of the heat exchanger, a data analysis unit for determining the peak working time period of the heat exchanger and the discrete degree of the peak working time period according to the historical heating data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to start the lower layer collaborative water supply mode according to the temperature drop rate of the upper fluid under the corresponding working mode, and a control unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result of the actual output flow of the heat exchanger and the preset output flow, wherein the working process parameters of the heat exchanger include a preset flow mean and a preset consistency degree.

[0013] Furthermore, the inlets and outlets of each layer include an upper heat medium inlet, an upper heat medium outlet, an upper heated fluid inlet, an upper heated fluid outlet, a lower heat medium inlet, a lower heat medium outlet, a lower heated fluid inlet and a lower heated fluid outlet, and the inlets and outlets of each layer are equipped with regulating valves.

[0014] Furthermore, the data analysis unit determines the peak period of the heat exchanger working time based on the comparison result of the flow mean during the heat exchanger working time with the preset flow mean, determines the working time as the peak period under the condition that the flow mean during the heat exchanger working time is greater than the preset flow mean, or determines the working time as the trough period under the condition that the flow mean during the heat exchanger working time is less than or equal to the preset flow mean.

[0015] Furthermore, the preset flow rate mean value is determined according to the flow rate mean value during the working time of the heat exchanger in the first preset period.

[0016] Furthermore, the data analysis unit determines the peak working time period of the heat exchanger based on the comparison result of the consistency degree of the peak time of the heat exchanger within the first preset time and the preset consistency degree, and determines the working time of the heat exchanger as the peak working time period when the consistency degree is greater than the preset consistency degree, or determines the working time of the heat exchanger as the trough working time period when the consistency degree is less than or equal to the preset consistency degree.

[0017] Furthermore, the data analysis unit determines the working mode of the heat exchanger based on a comparison result of the discrete degree of the peak working time period of the heat exchanger within the second preset time with the preset discrete degree, and determines the working mode of the heat exchanger to be the first mode when the discrete degree is greater than the preset discrete degree, or determines the working mode of the heat exchanger to be the second mode when the discrete degree is less than or equal to the preset discrete degree.

[0018] Furthermore, the control unit determines whether to start the lower layer collaborative water supply mode based on a comparison result of the temperature drop rate of the upper layer fluid in the corresponding working mode with a preset drop rate, and determines to start the lower layer collaborative water supply mode under the condition that the temperature drop rate of the upper layer fluid in the corresponding working mode is greater than the preset drop rate.

[0019] Furthermore, the adjustment unit determines whether to adjust the working process parameters of the heat exchanger based on the comparison result of the actual output flow of the heat exchanger with the preset output flow within the second preset period, and determines to adjust the working process parameters under the condition that the actual output flow is less than the preset output flow.

[0020] Furthermore, the preset output flow is determined according to an average value of actual output flow of the heat exchanger in a plurality of second preset cycles.

[0021] Furthermore, the preset flow mean is positively correlated with the growth rate of the heat exchanger during the peak working period, the adjustment amount of the preset flow mean is negatively correlated with the actual output flow of the heat exchanger, and the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow of the heat exchanger.

[0022] Compared with the prior art, the beneficial effect of the present invention is that the present invention distinguishes between peak periods and trough periods. During the trough period, due to the low mean flow rate, it means that the demand for hot water is small. At this time, the heat exchanger can reduce the consumption of heating power, and the heat exchanger reduces the supply of steam or heat medium to avoid unnecessary heating of a large amount of hot water, thereby saving energy. During the peak period, when the mean flow rate is greater than the preset value, it indicates that the demand for hot water is strong. At this time, centralized energy supply is used to meet the demand for hot water. Compared with the traditional heat exchanger that runs at full load regardless of time period, this dynamic energy allocation method based on actual demand can use energy for hot water heating more accurately, reducing energy waste during non-peak demand periods and improving energy utilization efficiency. The above method improves the accuracy of the analysis of the working mode of the energy-saving volumetric heat exchanger, thereby improving the accuracy of the control of the working process of the energy-saving volumetric heat exchanger to reduce resource waste.

[0023] Furthermore, in the present invention, when the degree of consistency is greater than a preset degree of consistency, the heating power of the heat exchanger can be adjusted in advance to ensure sufficient hot water supply. During non-peak time periods, energy input can be reduced to achieve accurate energy allocation. When the degree of consistency is low (less than or equal to the preset degree of consistency), it is determined to be a low-work time period, which means that the peak period of hot water demand is irregular. In this case, a large amount of hot water will not be prepared and too much energy will not be invested according to a fixed peak mode, thereby avoiding unnecessary waste of energy and improving energy utilization efficiency.

[0024] Furthermore, in the present invention, when the degree of discreteness of the working peak time period is greater than the preset discreteness, the first mode is adopted. In this mode, the temperature of the upper fluid of the heat exchanger is set to four-fifths of the required temperature. This setting takes into account that when the degree of discreteness of the peak time period is large, the hot water demand time is not concentrated and is relatively complex. By maintaining a relatively high upper water temperature but lower than the required temperature, part of the hot water demand can be quickly met during the non-concentrated water use period without heating a large amount of water from a lower temperature to the required temperature each time. When the discreteness is less than or equal to the preset discreteness, the second mode is adopted to set the upper fluid temperature to three-fifths of the required temperature. In this case, since the peak time period is relatively concentrated, there is more time to heat the lower fluid to meet the concentrated hot water demand. The lower upper water temperature setting can reduce energy consumption during the valley period because it is not necessary to keep the upper water at a higher temperature all the time. This mode can save energy by using the lower upper water temperature during non-peak periods, and use the lower hot water to meet the concentrated demand during peak periods. The above method improves the accuracy of the working mode analysis of the energy-saving positive displacement heat exchanger and thus improves the accuracy of the working process control of the energy-saving positive displacement heat exchanger to reduce resource waste.

[0025] Furthermore, the present invention compares the temperature drop rate of the upper fluid with the preset drop rate. When the temperature drop rate is less than or equal to the preset value, the lower layer collaborative water supply mode is not turned on. This can avoid unnecessary turning on of the lower layer water supply when the hot water demand is low or the upper layer hot water can meet the current demand. For example, during non-peak water usage periods, the temperature drop rate of the upper layer hot water is slow, indicating that the upper layer hot water can meet sporadic hot water demand at this time. Not turning on the lower layer water supply can reduce the heat loss of the lower layer hot water and the energy consumption of equipment such as pumps, thereby achieving the purpose of energy saving. When the temperature drop rate of the upper layer fluid is greater than the preset drop rate, the lower layer collaborative water supply mode is turned on. This ensures that when the hot water demand increases and the upper layer hot water cannot meet the demand alone, hot water can be replenished in time to ensure the stability of the hot water supply. For example, during peak water usage periods, with the large-scale use of the upper layer hot water, the temperature drops rapidly. At this time, turning on the lower layer collaborative water supply mode can not only meet the user's hot water demand, but also reasonably utilize the upper and lower layers of hot water according to actual needs, avoiding energy waste caused by always turning on the lower layer water supply.

[0026] Furthermore, the present invention can timely discover changes in hot water demand by comparing the actual output flow of the heat exchanger with the preset output flow in the second preset period. When the actual output flow is less than the preset output flow, it means that the hot water demand is reduced. At this time, the working process parameters are adjusted so that the operation of the heat exchanger can better match the actual demand and avoid excessive heating and energy waste. For example, in a hot water supply system of an office building, if the actual output flow is lower than the preset value for a continuous period of time, it may be because some tenants have reduced the use of hot water. By adjusting the parameters, the heating power of the heat exchanger can be reduced, thereby saving energy. According to the difference between the actual output flow and the preset output flow, the preset flow mean and the preset consistency are adjusted with the adjustment coefficient. Since the preset flow mean is positively correlated with the growth rate of the peak working time period of the heat exchanger, and its adjustment amount is negatively correlated with the actual output flow, this means that when the actual output flow decreases, the preset flow mean will be appropriately reduced. In this way, when judging the peak period and the trough period, the actual peak of hot water demand can be more accurately identified to avoid excessive energy investment during non-real peak periods. At the same time, the adjustment amount of the preset consistency level is negatively correlated with the actual output flow. When the actual output flow decreases, the preset consistency level will also be adjusted appropriately, making the judgment of the peak working time period more in line with the actual situation and further optimizing energy distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0028] Figure 2 A flowchart for determining the working mode of a heat exchanger in an energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0029] Figure 3 A flowchart for determining whether to start the lower layer collaborative water supply mode in the energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0030] Figure 4 A flowchart for determining whether to adjust the working process parameters of the heat exchanger in the energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0031] In the figure, 1, tube plate box; 2, outer shell; 3, upper layer heat medium inlet; 4, upper layer heated fluid outlet; 5, partition plate; 6, lower layer heat medium inlet; 7, lower layer heated fluid outlet; 8, coil; 9, lower layer heat medium outlet; 10, lower layer heated fluid inlet; 11, heat exchange plate; 12, upper layer heat medium outlet; 13, upper layer heated fluid inlet. DETAILED DESCRIPTION

[0032] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1-Figure 4 As shown, Figure 1 This is a schematic structural diagram of an energy-saving volumetric heat exchanger according to an embodiment of the present invention; Figure 2 A flowchart for determining the working mode of a heat exchanger in an energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0037] Figure 3 A flowchart for determining whether to start the lower layer collaborative water supply mode in the energy-saving volumetric heat exchanger according to an embodiment of the present invention; Figure 4 This is a workflow diagram for determining whether to adjust the working process parameters of the heat exchanger in the energy-saving volumetric heat exchanger according to an embodiment of the present invention.

[0038] The energy-saving volumetric heat exchanger according to the embodiment of the present invention comprises:

[0039] The tank body includes a shell 2 for accommodating the internal heat exchange structure and fluid, and a head (not shown in the figure) located at both ends of the tank body for sealing the tank body;

[0040] A layered structure, comprising a partition plate 5 connected to the shell to divide the internal space of the tank into different layers, and inlets and outlets of each layer connected to the tank to control the inlet and outlet of fluids in different layers;

[0041] A heat exchange element connected to the interlayer plate 5, comprising a coil 8 for realizing fluid circulation and a heat exchange plate 11 for accelerating the heat exchange rate;

[0042] A tube sheet box 1, which is connected to the tank body and is used to fix the heat exchange element;

[0043] A flow guiding structure, comprising a flow guiding plate (not shown in the figure) connected to the tank body for guiding the flow direction of the fluid and a flow guiding pipe (not shown in the figure) for controlling the flow speed of the fluid;

[0044] A control mechanism, which is respectively connected to the layered structure and the flow guiding structure, includes a data acquisition unit for acquiring historical heating data of the heat exchanger, a data analysis unit for determining the peak working time period of the heat exchanger and the discrete degree of the peak working time period according to the historical heating data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to start the lower layer collaborative water supply mode according to the temperature drop rate of the upper fluid under the corresponding working mode, and a control unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result of the actual output flow of the heat exchanger and the preset output flow, wherein the working process parameters of the heat exchanger include a preset flow mean and a preset consistency degree.

[0045] The historical heating data in the embodiment of the present invention includes but is not limited to "heat exchanger output flow, heat exchanger working time and heat exchanger internal fluid temperature".

[0046] Specifically, the inlets and outlets of each layer include an upper heat medium inlet 3, an upper heat medium outlet 12, an upper heated fluid inlet 13, an upper heated fluid outlet 4, a lower heat medium inlet 6, a lower heat medium outlet 9, a lower heated fluid inlet 10 and a lower heated fluid outlet 7, and the inlets and outlets of each layer are equipped with regulating valves (not shown in the figure).

[0047] Specifically, the data analysis unit determines the peak period of the heat exchanger working time according to the comparison result of the flow rate mean value during the heat exchanger working time and the preset flow rate mean value;

[0048] If the average flow rate during the working time of the heat exchanger is greater than the preset average flow rate, the working time is determined to be a peak period;

[0049] If the flow rate average value during the working time of the heat exchanger is less than or equal to the preset flow rate average value, the working time is determined to be a low period.

[0050] The preset flow average value in the embodiment of the present invention is determined by the flow average value during the working time of the heat exchanger within the first preset period. The first preset period is set to 30 days, but the above value is not limited to this. Technical personnel in this field can also adjust the value according to actual needs.

[0051] The present invention distinguishes between peak periods and trough periods. During the trough period, due to the low mean flow rate, it means that the demand for hot water is small. At this time, the heat exchanger can reduce the consumption of heating power, and the heat exchanger reduces the supply of steam or heat medium to avoid unnecessary heating of a large amount of hot water, thereby saving energy. During the peak period, when the mean flow rate is greater than the preset value, it indicates that the demand for hot water is strong. At this time, centralized energy supply is used to meet the demand for hot water. Compared with the traditional heat exchanger that runs at full load regardless of time period, this dynamic energy allocation method based on actual demand can more accurately use energy for hot water heating, reduce energy waste during non-peak demand periods, and improve energy utilization efficiency. The above method improves the accuracy of the analysis of the working mode of the energy-saving volumetric heat exchanger, thereby improving the accuracy of the control of the working process of the energy-saving volumetric heat exchanger to reduce resource waste.

[0052] Specifically, the data analysis unit determines the peak working time period of the heat exchanger according to the comparison result of the consistency degree of the peak time period of the heat exchanger within the first preset time period and the preset consistency degree;

[0053] If the consistency level is greater than the preset consistency level, it is determined that the working time of the heat exchanger is the working peak time period;

[0054] If the consistency level is less than or equal to the preset consistency level, it is determined that the working time of the heat exchanger is a low working time period.

[0055] In the embodiment of the present invention, the first preset time is set to 20 days, and the consistency of the peak time of the heat exchanger within the first preset time is that the frequency of the time periods with the same peak time of the heat exchanger within the first preset time is greater than the preset frequency, and the preset frequency is set to 0.75. For example, within 20 days, there are 15 days with the same time period of the peak time of the heat exchanger from 12 o'clock to 1 o'clock, then the frequency of the time period with the same peak time of the heat exchanger within the first preset time is 0.75, and the value of the preset consistency is set to 0.78, but the above value is not limited to this, and technical personnel in this field can also adjust the value according to actual needs.

[0056] In the present invention, when the degree of consistency is greater than the preset consistency, the heating power of the heat exchanger can be adjusted in advance to ensure sufficient hot water supply. During non-peak time periods, energy input can be reduced to achieve accurate energy allocation. When the degree of consistency is low (less than or equal to the preset consistency), it is determined to be a low-work time period, which means that the peak period of hot water demand is irregular. In this case, a large amount of hot water will not be prepared and too much energy will not be invested according to a fixed peak mode, thereby avoiding unnecessary waste of energy and improving energy utilization efficiency.

[0057] Specifically, the data analysis unit determines the working mode of the heat exchanger according to the comparison result of the discrete degree of the working peak time period of the heat exchanger within the second preset time and the preset discrete degree;

[0058] If the discrete degree is greater than the preset discrete degree, determining that the working mode of the heat exchanger is the first mode;

[0059] If the discrete degree is less than or equal to the preset discrete degree, determining that the working mode of the heat exchanger is the second mode;

[0060] The preset discreteness is the average discreteness of the historical peak working time period of the heat exchanger, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0061] In the embodiment of the present invention, the degree of discreteness of the working peak time period can be achieved by sorting the data of the working peak time period. Each peak time period can be represented by a start time and an end time. For example, there are three peak time periods, namely [8:00-9:00], [13:00-14:00] and [19:00-20:00]. These data are used as samples for cluster analysis, and the K-Means clustering algorithm is used. The basic idea of ​​the algorithm is to divide the samples into K clusters so that the sum of the distances from each sample to the center of the cluster to which it belongs is minimized. Here, K can be set according to actual conditions. For example, you can first try to divide the peak time period into two clusters (K=2) to see whether you can distinguish relatively concentrated and dispersed peak time periods. After obtaining different clustering results through cluster analysis, calculate indicators such as the diameter of each cluster (the distance between the two farthest points in the cluster) or the average distance of samples within the cluster. If the diameter of the cluster is large or the average distance is large, it means that the peak periods in this cluster are relatively scattered, and it can be inferred that the degree of dispersion of the entire working peak period is large. The second preset time is set to 25 days, but the above value is not limited to this. Technical personnel in this field can also adjust the value according to actual needs.

[0062] In the embodiment of the present invention, the first mode is that the temperature of the upper fluid of the heat exchanger is set to the first temperature, and the second mode is that the temperature of the upper fluid of the heat exchanger is set to the second temperature. The first temperature is set to four-fifths of the required temperature, the second temperature is set to three-fifths of the required temperature, and the temperature of the lower fluid is set to the required temperature. However, the above values ​​are not limited to this, and technical personnel in this field can also adjust the values ​​according to actual needs.

[0063] In the present invention, when the degree of discreteness of the working peak time period is greater than the preset discreteness, the first mode is adopted. In this mode, the temperature of the upper fluid of the heat exchanger is set to four-fifths of the required temperature. This setting takes into account that when the degree of discreteness of the peak time period is large, the hot water demand time is not concentrated and is relatively complex. By maintaining a relatively high upper water temperature but lower than the required temperature, part of the hot water demand can be quickly met during the non-concentrated water use period without heating a large amount of water from a lower temperature to the required temperature each time. When the discreteness is less than or equal to the preset discreteness, the second mode is adopted to set the upper fluid temperature to three-fifths of the required temperature. In this case, since the peak time period is relatively concentrated, there is more time to heat the lower fluid to meet the concentrated hot water demand. The lower upper water temperature setting can reduce energy consumption during the valley period because it is not necessary to keep the upper water at a higher temperature all the time. This mode can save energy by using the lower upper water temperature during non-peak periods, and use the lower hot water to meet the concentrated demand during peak periods. The above method improves the accuracy of the working mode analysis of the energy-saving positive displacement heat exchanger and thus improves the accuracy of the working process control of the energy-saving positive displacement heat exchanger to reduce resource waste.

[0064] Specifically, the control unit determines whether to start the lower layer coordinated water supply mode according to the comparison result of the temperature drop rate of the upper layer fluid in the corresponding working mode and the preset drop rate;

[0065] If the temperature drop rate of the upper layer fluid in the corresponding working mode is greater than the preset drop rate, it is determined to start the lower layer coordinated water supply mode;

[0066] If the temperature drop rate of the upper layer fluid in the corresponding working mode is less than or equal to the preset drop rate, it is determined not to start the lower layer coordinated water supply mode;

[0067] Among them, the preset drop rate is the historical average of the drop speed of the upper fluid under the same working mode of the heat exchanger, but the above value is not limited to this, and technicians in this field can also adjust the value according to actual needs.

[0068] The lower layer collaborative water supply mode of opening in the embodiment of the present invention can be realized by opening the lower layer inlet and outlet valves.

[0069] The present invention compares the temperature drop rate of the upper fluid with the preset drop rate. When the temperature drop rate is less than or equal to the preset value, the lower layer collaborative water supply mode is not turned on. This can avoid unnecessary turning on of the lower layer water supply when the hot water demand is low or the upper layer hot water can meet the current demand. For example, during non-peak water usage periods, the temperature drop rate of the upper layer hot water is slow, indicating that the upper layer hot water can meet sporadic hot water demand at this time. Not turning on the lower layer water supply can reduce the heat loss of the lower layer hot water and the energy consumption of equipment such as pumps, thereby achieving the purpose of energy saving. When the temperature drop rate of the upper fluid is greater than the preset drop rate, the lower layer collaborative water supply mode is turned on. This ensures that when the hot water demand increases and the upper layer hot water cannot meet the demand alone, the hot water can be replenished in time to ensure the stability of the hot water supply. For example, during peak water usage periods, with the large-scale use of the upper layer hot water, the temperature drops rapidly. At this time, turning on the lower layer collaborative water supply mode can not only meet the user's hot water demand, but also reasonably utilize the upper and lower layers of hot water according to actual needs, avoiding the energy waste caused by always turning on the lower layer water supply.

[0070] Specifically, the adjustment unit determines whether to adjust the working process parameters of the heat exchanger according to the comparison result between the actual output flow of the heat exchanger and the preset output flow in the second preset period;

[0071] If the actual output flow rate is less than the preset output flow rate, determining to adjust the working process parameters;

[0072] If the actual output flow rate is greater than or equal to the preset output flow rate, it is determined that the working process parameters are not adjusted.

[0073] The preset output flow in the embodiment of the present invention is three-fifths of the average value of the actual output flow of the heat exchanger within several second preset periods. The second preset period is set to 35 days, but the above value is not limited to this. Technical personnel in this field can also adjust the value according to actual needs.

[0074] Specifically, the adjustment unit determines to adjust the preset flow mean and the preset consistency level by using an adjustment coefficient under the condition of determining to adjust the working process parameters.

[0075] In the embodiment of the present invention, the value range of the adjustment coefficient is set to 1.05-1.21, the preset flow mean is positively correlated with the growth rate of the heat exchanger during the peak working time period, the adjustment amount of the preset flow mean is negatively correlated with the actual output flow of the heat exchanger, and the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow of the heat exchanger.

[0076] The present invention can timely discover the change of hot water demand by comparing the actual output flow of the heat exchanger with the preset output flow in the second preset period. When the actual output flow is less than the preset output flow, it means that the hot water demand is reduced. At this time, the working process parameters are adjusted so that the operation of the heat exchanger can better match the actual demand and avoid excessive heating and energy waste. For example, in the hot water supply system of an office building, if the actual output flow is lower than the preset value for a continuous period of time, it may be because some tenants have reduced the use of hot water. By adjusting the parameters, the heating power of the heat exchanger can be reduced, thereby saving energy. According to the difference between the actual output flow and the preset output flow, the preset flow mean and the preset consistency are adjusted by the adjustment coefficient. Since the preset flow mean is positively correlated with the growth rate of the peak working time period of the heat exchanger, and its adjustment amount is negatively correlated with the actual output flow, this means that when the actual output flow decreases, the preset flow mean will be appropriately reduced. In this way, when judging the peak period and the trough period, the actual peak of hot water demand can be more accurately identified to avoid excessive energy investment during non-real peak periods. At the same time, the adjustment amount of the preset consistency level is negatively correlated with the actual output flow. When the actual output flow decreases, the preset consistency level will also be adjusted appropriately, making the judgment of the peak working time period more in line with the actual situation and further optimizing energy distribution.

[0077] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving volumetric heat exchanger, characterized in that: include: The tank body includes a shell for accommodating the internal heat exchange structure and fluid and a head located at both ends of the tank body for sealing the tank body; A layered structure, comprising a partition plate connected to the shell to divide the internal space of the tank into different layers, and inlets and outlets of each layer connected to the tank to control the inlet and outlet of fluids in different layers; A heat exchange element connected to the interlayer plate, comprising a coil for realizing fluid circulation and a heat exchange plate for accelerating the heat exchange rate; A tube sheet box, which is connected to the tank body and is used to fix the heat exchange element; A flow guiding structure, comprising a flow guiding plate connected to the tank body for guiding the flow direction of the fluid and a flow guiding pipe for controlling the flow speed of the fluid; A control mechanism, which is respectively connected to the layered structure and the flow guiding structure, includes a data acquisition unit for acquiring historical heating data of the heat exchanger, a data analysis unit for determining the peak working time period of the heat exchanger and the discrete degree of the peak working time period according to the historical heating data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to start the lower layer collaborative water supply mode according to the temperature drop rate of the upper fluid under the corresponding working mode, and a control unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result of the actual output flow of the heat exchanger and the preset output flow, wherein the working process parameters of the heat exchanger include a preset flow mean and a preset consistency degree.

2. The energy-saving volumetric heat exchanger according to claim 1, characterized in that: The inlets and outlets of each layer include an upper heat medium inlet, an upper heat medium outlet, an upper heated fluid inlet, an upper heated fluid outlet, a lower heat medium inlet, a lower heat medium outlet, a lower heated fluid inlet and a lower heated fluid outlet, and each layer of the inlets and outlets is equipped with a regulating valve.

3. The energy-saving volumetric heat exchanger according to claim 2, characterized in that: The data analysis unit determines the peak period of the heat exchanger working time based on the comparison result of the flow mean value during the heat exchanger working time and the preset flow mean value, determines the working time as the peak period under the condition that the flow mean value during the heat exchanger working time is greater than the preset flow mean value, or determines the working time as the trough period under the condition that the flow mean value during the heat exchanger working time is less than or equal to the preset flow mean value.

4. The energy-saving volumetric heat exchanger according to claim 3 is characterized in that: The preset flow rate mean value is determined according to the flow rate mean value during the working time of the heat exchanger in the first preset period.

5. The energy-saving volumetric heat exchanger according to claim 4, characterized in that: The data analysis unit determines the peak working time period of the heat exchanger based on the comparison result of the consistency degree of the peak time of the heat exchanger within the first preset time and the preset consistency degree, determines the working time of the heat exchanger as the peak working time period when the consistency degree is greater than the preset consistency degree, or determines the working time of the heat exchanger as the trough working time period when the consistency degree is less than or equal to the preset consistency degree.

6. The energy-saving volumetric heat exchanger according to claim 5, characterized in that: The data analysis unit determines the working mode of the heat exchanger based on a comparison result of the discrete degree of the working peak time period of the heat exchanger within the second preset time with the preset discrete degree, and determines that the working mode of the heat exchanger is the first mode when the discrete degree is greater than the preset discrete degree, or determines that the working mode of the heat exchanger is the second mode when the discrete degree is less than or equal to the preset discrete degree.

7. The energy-saving volumetric heat exchanger according to claim 6, characterized in that: The control unit determines whether to start the lower layer collaborative water supply mode based on the comparison result of the temperature drop rate of the upper layer fluid in the corresponding working mode and the preset drop rate, and determines to start the lower layer collaborative water supply mode under the condition that the temperature drop rate of the upper layer fluid in the corresponding working mode is greater than the preset drop rate.

8. The energy-saving volumetric heat exchanger according to claim 7, characterized in that: The adjustment unit determines whether to adjust the working process parameters of the heat exchanger based on the comparison result of the actual output flow of the heat exchanger with the preset output flow in the second preset period, and determines to adjust the working process parameters under the condition that the actual output flow is less than the preset output flow.

9. The energy-saving volumetric heat exchanger according to claim 8, characterized in that: The preset output flow is determined according to an average value of actual output flows of the heat exchanger within a plurality of second preset periods.

10. The energy-saving volumetric heat exchanger according to claim 9, characterized in that: The preset flow mean is positively correlated with the growth rate of the heat exchanger during the peak working period, the adjustment amount of the preset flow mean is negatively correlated with the actual output flow of the heat exchanger, and the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow of the heat exchanger.

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