System for metering energy saving amount of dehumidification type heat pipe based on flow meter and integrating instrument

Abstract

The utility model relates to the field of dehumidification type heat pipe energy-saving quantity systems, in particular to a system for metering the energy-saving quantity of a dehumidification type heat pipe based on a flowmeter and an integrating instrument. The reheating section water supply pipe and the reheating section water return pipe are communicated with the air conditioning box body; the cold section water supply pipe and the cold section water return pipe are communicated with the air conditioning box body; the first hot water electromagnetic valve flowmeter is arranged at the water inlet end of the reheating section water supply pipe; and the first cold water electromagnetic valve flowmeter is arranged at the water inlet end of the cold section water supply pipe. The beneficial effects of the utility model are that according to the technical scheme, the instantaneous water velocity and water flow in the pipeline are metered through the electromagnetic flow meter, the water inlet and outlet temperature fed back by the thermometer is combined, a signal is transmitted to the integrating instrument to calculate the consumed heat or cold, and finally, the data is summarized to the PLC monitoring cabinet for classified display, so that the work efficiency is improved. Therefore, the energy consumption difference of the air conditioning cabinet provided with the dehumidification heat pipe under the energy-saving working condition and the non-energy-saving working condition of the dehumidification heat pipe is directly fed back.

Description

Technical Field

[0001] This utility model relates to the field of dehumidifying heat pipe energy saving systems, and in particular to a system for measuring the energy of dehumidifying heat pipes based on a flow meter and an integrator. Background Technology

[0002] Dehumidifying heat pipe energy-saving devices, as a relatively effective type of energy-saving air conditioning product, have been widely used in constant temperature and humidity air conditioning energy-saving retrofit projects both domestically and internationally. Their working principle is that, under summer dehumidification conditions, the high-temperature heat from the intake air section is pre-cooled through the heat pipe pre-cooling section. Part of the heat is transferred to the rear end of the heat pipe to heat the low-temperature supply air after the cooling coil, thereby increasing the supply air temperature of the air conditioning unit. This type of energy-saving device operates stably and reliably, with significant energy-saving effects, and has high value for energy-saving retrofits.

[0003] The existing technology CN2021224124092 generally uses theoretical calculations based on temperature changes before and after the installation of dehumidifying heat pipes to measure the actual energy savings. However, this method presents significant difficulties in verifying the actual energy-saving effect and the error in the theoretical calculations.

[0004] Therefore, it is necessary to design a system based on flow meters and totalizers to measure the energy of dehumidifying heat pipe sections and solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a system for measuring the energy of a dehumidifying heat pipe system based on a flow meter and an integrator, so as to overcome the above-mentioned shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A system for measuring energy savings in a dehumidifying heat pipe based on flow meters and totalizers includes an air conditioning unit body, a reheat section water supply pipe and a reheat section water return pipe connected to the air conditioning unit body, a cold section water supply pipe and a cold section water return pipe connected to the air conditioning unit body, characterized in that: it further includes a first hot water solenoid valve flow meter installed at the inlet end of the reheat section water supply pipe, a first cold water solenoid valve flow meter installed at the inlet end of the cold section water supply pipe, hot water thermometers respectively installed on the reheat section water supply pipe and the reheat section water return pipe, cold water thermometers respectively installed on the cold section water supply pipe and the cold section water return pipe, a hot water totalizer connected to the hot water thermometer and the first hot water solenoid valve flow meter respectively via wiring harness or electrical signal, a cold water totalizer connected to the cold water thermometer and the first cold water solenoid valve flow meter respectively via wiring harness or electrical signal, and a PLC detection cabinet that is electrically connected to the hot water totalizer and the cold water totalizer respectively and is used for automatic calculation.

[0008] Preferably, several sets of control valves and throttling valves are installed on the reheat section water supply pipe, the reheat section water return pipe, the cold section water supply pipe, and the cold section water return pipe.

[0009] Preferably, the PLC testing cabinet is also equipped with a display.

[0010] The beneficial effects of this utility model are as follows: This technical solution measures the instantaneous water velocity and flow rate in the pipeline using an electromagnetic flow meter, and combines this with the inlet and outlet temperatures fed back by a thermometer. The signal is then transmitted to an integrator to calculate the consumed heat or cooling capacity. Finally, the data is aggregated in a PLC monitoring cabinet for categorized display, thereby directly feeding back the energy consumption difference between the dehumidifying heat pipe energy-saving and non-energy-saving modes of the air conditioning unit equipped with the dehumidifying heat pipe. This system features high operational stability, relatively accurate measurement, and convenient data collection. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a system based on a flow meter and an integrator for measuring the energy of a dehumidifying heat pipe section according to this utility model;

[0012] In the diagram: 1. First hot water solenoid valve flow meter; 2. First cold water solenoid valve flow meter; 81. Reheat section water supply pipe; 82. Reheat section water return pipe; 3. Hot water thermometer; 83. Cold section water supply pipe; 84. Cold section water return pipe; 4. Cold water thermometer; 6. Hot water totalizer; 5. Cold water totalizer; 7. PLC detection cabinet; 8. Air conditioning unit body. Detailed Implementation

[0013] Taking the air conditioning unit as an example, refer to Figure 1 A system for measuring energy savings in dehumidified heat pipes based on flow meters and totalizers includes an air conditioning unit body 8, a reheat section water supply pipe 81 and a reheat section water return pipe 82 connected to the air conditioning unit body, a cold section water supply pipe 83 and a cold section water return pipe 84 connected to the air conditioning unit body, a first hot water solenoid valve flow meter 1 installed at the inlet end of the reheat section water supply pipe, a first cold water solenoid valve flow meter 2 installed at the inlet end of the cold section water supply pipe 83, and flow meters respectively installed on the reheat section water supply pipe 81 and the reheat section water return pipe 84. The system includes a hot water thermometer 3 on the return water pipe 82, a cold water thermometer 4 on the cold water supply pipe 83 and the cold water return pipe 84 respectively, a hot water totalizer 6 connected to the hot water thermometer 3 and the first hot water solenoid valve flow meter 1 respectively via wiring harness or electrical signal, a cold water totalizer 5 connected to the cold water thermometer 4 and the first cold water solenoid valve flow meter 2 respectively via wiring harness or electrical signal, and a PLC detection cabinet 7 that is electrically connected to the hot water totalizer 6 and the cold water totalizer 5 respectively and is used for automatic calculation.

[0014] Hot water entering the heating coil of the air conditioning unit first enters the first hot water solenoid valve flow meter 1 (hot water). The flow signal recorded by the first hot water solenoid valve flow meter 1 is transmitted to the hot water totalizer 6 (hot water) via a shielded cable. At the same time, the hot water thermometers 3 (hot water) on the supply and return water sides of the heating coil transmit temperature signals to the hot water totalizer 6 (hot water) via shielded cables. The hot water flow signal and temperature signal transmitted to the hot water totalizer 6 are converted into energy data by the hot water totalizer 6 (hot water).

[0015] The chilled water entering the air conditioning unit's cooling coil first enters the first chilled water solenoid valve flow meter 2 (chilled water). The flow signal recorded by the solenoid flow meter is transmitted to the chilled water totalizer 5 (chilled water) via a shielded wire. At the same time, the temperature signal from the chilled water thermometer 4 (chilled water) on the supply and return water side of the cooling coil is transmitted to the totalizer 5 (chilled water) via a shielded wire. The flow signal and temperature signal transmitted to the chilled water totalizer 5 (chilled water) are converted into energy data by the chilled water totalizer 5 (chilled water).

[0016] The specific formula for converting the power of the integrator is as follows:

[0017] Power Q (kW) = qmw * c(tw2 - tw1)

[0018] Where: qmw -- water flow rate kg / s, c -- water specific heat capacity kJ / (kg*k), tw1 -- inlet water temperature ℃, tw2 -- outlet water temperature ℃

[0019] At the same time, the integrator can automatically record the running time and calculate the actual energy consumed;

[0020] After obtaining the above calculated data, the PLC monitoring cabinet calculates the energy based on the obtained power.

[0021] The specific formulas for converting energy to power are as follows:

[0022] Energy (kWh) = Power Q (kW) * Duration (h)

[0023] Through the above detection and calculation, the corresponding energy, i.e., energy consumption, is obtained.

[0024] After the data conversion work of the cold water totalizer 5 and the hot water totalizer 6 is completed, the data is transmitted to the PLC monitoring cabinet.

[0025] For ease of control, several sets of control valves and throttle valves are installed on the reheat section water supply pipe 81, reheat section water return pipe 82, cold section water supply pipe 83, and cold section water return pipe 84; the flow rate and on / off state of the reheat section water supply pipe 81, reheat section water return pipe 82, cold section water supply pipe 83, and cold section water return pipe 84 are controlled by the control valves and throttle valves respectively.

[0026] Taking the new air conditioning unit as an example, the specific calculation methods include the following: Energy-saving metering method using a combination of electromagnetic flowmeter and totalizer with PLC monitoring cabinet.

[0027] During the energy conservation monitoring period, the air conditioning unit operated in normal production mode.

[0028] 1. Metering cycle

[0029] The data sample measurement period for this implementation case is 30 days (15 days of data in energy-saving mode and 15 days of data in non-energy-saving mode).

[0030] The renovation method in this implementation case adopts the daily interval energy-saving metering method. If the temperature difference between the mixed air and the temperature between two days is greater than 2℃ (this value can be agreed upon) at the same monitoring time point, the recorded data is invalidated and new data is recorded in the next period.

[0031] For example, starting from August 1st, the 1st is the energy-saving device's operating day (energy-saving mode), running from 00:00 to 24:00 on the 1st; the 2nd is the energy-saving device's off day (non-energy-saving mode), running from 00:00 to 24:00 on the 2nd; the 3rd is the energy-saving device's operating day (energy-saving mode), running from 00:00 to 24:00 on the 3rd; and so on...

[0032] A total of 30 days were recorded, including 15 days of energy-saving device operation (energy-saving mode) and 15 days of energy-saving device shutdown (non-energy-saving mode). The device was operated at intervals each day, and the monitoring data was collected separately for the two categories. All circuits of the energy-saving device were equipped with electric valves. In non-energy-saving mode, all electric valves needed to be closed to shut down all heat exchange circuits of the energy-saving device.

[0033] 2. Energy-saving data recording

[0034] After the monitoring period expired, the measurement parameters were as follows:

[0035] Energy-saving mode reheating plate hot water energy consumption Qheat1, Qheat3, Qheat5, Qheat7…

[0036] Energy-saving mode cooling coil chilled water energy consumption Q_cooling1, Q_cooling3, Q_cooling5, Q_cooling7…

[0037] In non-energy-saving mode, the reheat plate hot water energy consumption is Qheat2, Qheat4, Qheat6, Qheat8…

[0038] In non-energy-saving mode, the chilled water energy consumption of the cooling coil is Qcooling2, Qcooling4, Qcooling6, Qcooling8…

[0039] 3. Monitoring data collection

[0040] Based on the statistical sample data, the results are as follows:

[0041] (Example: August 17th (30.2℃), the temperature in parentheses is the current mixed air temperature (for a fresh air conditioning unit, the temperature in parentheses is the outdoor intake air temperature). If the temperature difference between the mixed air and the next day is greater than 2℃ (this value can be agreed upon), the recorded data will be invalid and will not be of reference value.)

[0042]

[0043] 4. Energy-saving data analysis

[0044] Based on the statistical data obtained from the combination of the electromagnetic flowmeter, totalizer, and PLC monitoring cabinet, the energy-saving effect of dehumidifying heat pipes in constant temperature and humidity air conditioning units can be clearly demonstrated. The PLC monitoring cabinet is also equipped with a display screen for viewing the above data.

[0045] Both the cooling section and reheat section water supply pipes are equipped with "pipeline electromagnetic flow meters." Temperature sensors are also installed on the inlet and outlet pipes of both sections. The instrument data is aggregated into a data integrator, which connects to a PLC monitoring cabinet, where it is displayed on the cabinet interface. After the heat pipe energy-saving retrofit of the air conditioning unit, this metering method provides a more intuitive representation of the actual energy-saving effect of the dehumidifying heat pipes.

[0046] The advantages of this utility model are that this technical solution uses an electromagnetic flowmeter to measure the instantaneous water velocity and flow rate in the pipeline, and combines the inlet and outlet water temperatures fed back by a thermometer to transmit the signal to an integrator to calculate the consumed heat or cooling capacity. Finally, the data is summarized in the PLC monitoring cabinet for classification and display, thereby directly feeding back the energy consumption difference of the air conditioning unit equipped with dehumidifying heat pipes in the two modes of energy-saving and non-energy-saving operation. This system has the characteristics of high operational stability, relatively accurate measurement, and convenient data collection.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A system for measuring the energy saving of a dehumidification type heat pipe based on a flow meter and an integrator, comprising an air conditioning box body, a reheat section water supply pipe and a reheat section return water pipe connected to the air conditioning box body, and a cold section water supply pipe and a cold section return water pipe connected to the air conditioning box body, characterized in that: The first hot water electromagnetic valve flow meter is arranged at the water inlet end of the reheat section water supply pipe, the first cold water electromagnetic valve flow meter is arranged at the water inlet end of the cold section water supply pipe, the hot water temperature meters are arranged on the reheat section water supply pipe and the reheat section water return pipe respectively, the cold water temperature meters are arranged on the cold section water supply pipe and the cold section water return pipe respectively, the hot water totalizer is connected with the hot water temperature meter and the first hot water electromagnetic valve flow meter through a wire harness or an electric signal, the cold water totalizer is connected with the cold water temperature meter and the first cold water electromagnetic valve flow meter through a wire harness or an electric signal, and the PLC detection cabinet is electrically connected with the hot water totalizer and the cold water totalizer and used for automatic calculation.

2. The system for measuring the energy saving of a heat pipe of a dehumidification type according to claim 1, wherein: A plurality of groups of control valves and throttles are arranged on the reheat section water supply pipe, the reheat section water return pipe, the cold section water supply pipe and the cold section water return pipe.

3. The system for measuring the energy saving of a heat pipe of a dehumidification type according to claim 1, wherein: The PLC detection cabinet is further provided with a display.

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