CN115128118A - Waste water pipeline heat loss simulation test device - Google Patents
Waste water pipeline heat loss simulation test device Download PDFInfo
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- CN115128118A CN115128118A CN202110331377.5A CN202110331377A CN115128118A CN 115128118 A CN115128118 A CN 115128118A CN 202110331377 A CN202110331377 A CN 202110331377A CN 115128118 A CN115128118 A CN 115128118A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a waste water pipeline heat loss simulation test device, which adopts an inverted U-shaped pipeline, wherein one side of the pipeline is connected with a water pump, so that waste hot water is ensured to fill the pipeline, the flow value is obtained by measurement, the other side of the pipeline naturally falls, the pipeline is not filled with the waste hot water, and the temperature difference is measured, thereby obtaining the heat loss value of the whole pipeline. The whole device has simple structure, low cost and convenient operation.
Description
Technical Field
The invention belongs to the technical field of building and bathing equipment research, and particularly relates to a bathing wastewater pipeline heat loss simulation test device.
Background
A water source heat pump hot water system for gradient utilization of waste heat of bath wastewater utilizes a water source heat pump technology to extract heat energy in discharged bath wastewater for cyclic utilization, and the heat energy is used as a heat source to heat tap water to about 45 ℃ for daily bath of a user. The system is applied in large scale in all large bathing places in China, bathrooms in colleges and universities, and the like, and has higher economic benefit and social benefit proved by practice. The performance of the bathing wastewater waste heat cascade heat pump hot water system is mainly evaluated to be a COP value, and the larger the COP value is, the lower the energy cost of the system for preparing hot water is. The temperature of the bath wastewater as a heat source is one of important factors for determining the COP value of the system. Therefore, the pipeline heat insulation of the bath wastewater conveyed to the wastewater collection tank is particularly important, and the pipeline heat loss value not only can comprehensively reflect key parameters of the overall level of the thermal design, the heat insulation material, the construction process and the like of the waste hot water pipeline, but also is a main basis for evaluating the heat insulation and energy saving conditions of the pipeline to be modified or the newly-built pipeline.
The existing pipeline heat loss measuring method generally measures the temperature at two ends of a pipeline, calculates the temperature difference, and then calculates the heat loss value by matching with the flow, and the flow measurement needs to be accurately measured when the pipeline is filled with water. The waste water collecting pipe in the bathing waste water and waste heat cascade heat pump hot water system is difficult to fill the whole conveying pipeline with waste hot water due to the limitation of factors such as the number of people in bathing, bathing time and the like, and a conventional device is adopted for testing, so that the accuracy of the flow cannot be ensured, and the obtained pipeline heat loss value is inaccurate.
Disclosure of Invention
The invention provides a waste water pipeline heat loss simulation test device, which adopts an inverted U-shaped pipeline, wherein one side of the pipeline is connected with a water pump, so that waste hot water is ensured to fill the pipeline and is measured to obtain a flow value, the other side of the pipeline naturally falls, the waste hot water does not fill the pipeline, the temperature difference is measured, the heat loss value of the whole pipeline is obtained, the flow of a water pump I is a flow target value to be simulated through constant-temperature heating of a waste water collecting box and a flow regulating device, the flow of a water pump II is completely equal to that of the water pump I, and the long-time continuous operation of the measuring device is realized. The whole device has simple structure, low cost and convenient operation.
The technical scheme provided by the invention is as follows:
the invention discloses a waste water pipeline heat loss simulation test device which comprises a waste water collecting box, a water pump I, a flowmeter, a temperature detector I, a temperature detector II, a buffer water tank and a water pump II.
Preferably, the inverted U-shaped pipeline consists of a pipeline I, a pipeline II and a pipeline III, wherein the pipeline I and the pipeline III are vertically arranged, and the pipeline II is horizontally arranged and is respectively connected with the pipeline I and the pipeline III; the pipeline I is connected with the water pump I, and the pipeline III is connected with the buffer water tank; pipeline I, II pipe diameters of pipeline are the same, all are less than pipeline III's pipe diameter.
Preferably, the waste water collecting tank is a water tank which is heated by adopting electric heating or heat pump circulation.
Preferably, the flow of the water pump I is enabled to be a target flow value to be simulated through the flow regulating device, and the flow of the water pump II is completely equal to that of the water pump I.
Compared with the prior art, the invention has the following advantages:
(1) the device of the invention can measure the heat dissipation loss when the bath wastewater is full of the pipe and can also measure the heat dissipation loss when the liquid is not full of the pipe. The structure is simple, the heat loss measurement of the pipeline is more convenient, the continuous repeated operation can be carried out, and the device is also suitable for measuring the heat loss of other hot water pipelines.
(2) The invention adopts the inverted U-shaped pipeline, one side of the pipeline is connected with the water pump, the waste hot water is ensured to fill the pipeline, the flow value is obtained by measurement, the other side of the pipeline naturally falls, the waste hot water does not fill the pipeline, the temperature difference is measured, the actual working condition of the waste hot water drain pipe of the civil buildings such as a residential district, a hotel and the like is simulated relatively closely, the real-time and the accuracy of the heat loss measurement of the pipeline are improved, the measurement speed is accelerated, the working efficiency is improved, and the operation is simpler and faster.
(3) Through the constant temperature heating to waste water collecting box and through flow control device for I flow of water pump is the flow target value that needs the simulation, and II flow of water pump equals completely with I flow of water pump, realizes measuring device's long-time continuous operation, and the data volume that obtains is more, and data are more reliable.
Drawings
FIG. 1 is a schematic flow chart of the present invention
Wherein: 1. waste water collecting box 2, water pump I3, flowmeter 4, thermodetector I5, thermodetector II 6, buffer tank 7, water pump II 8, pipeline I9, pipeline II 10, pipeline III.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific embodiments.
The invention discloses a heat loss simulation test device for a bath wastewater pipeline, which consists of a wastewater collection box 1, a water pump I2, a flowmeter 3, a temperature detector I4, a temperature detector II 5, a buffer water tank 6 and a water pump II 7, wherein the wastewater collection box 1 and the water pump I2 are connected through pipelines, the water pump I2 and the buffer water tank 6 are connected through an inverted U-shaped pipeline, the inverted U-shaped pipeline consists of a pipeline I8, a pipeline II 9 and a pipeline III 10, and the pipeline I8 and the pipeline III 10 are vertically arranged; the pipeline II 9 is horizontally arranged and is respectively connected with the pipeline I8 and the pipeline III 10; the pipeline I8 is connected with the water pump I2, and the pipeline III 10 is connected with the buffer water tank 6; pipeline I8, pipeline II 9 pipe diameter are the same, all are less than the pipe diameter of pipeline III 10. Flowmeter 3 installs on pipeline I8, and thermoscope I4, thermoscope II 5 install peak and minimum on pipeline III 10 respectively, and water pump II 7 is connected with wastewater collection box 1, 6 tube connections of buffer tank respectively.
According to the practical use condition, the mounting position of water pump I2 will be less than the summit of pipeline I8, and the mounting position of water pump II 7 will be less than the minimum of pipeline II 9 to the waste hot water pump is gone into or is pumped out to the convenience. In order to facilitate the continuous measurement of heat loss, the waste water collecting box can be insulated by adopting heating modes such as electric heating or an air source heat pump and the like.
During the in-service use, through the constant temperature heating to wastewater collection box 1 to and through flow control device, make I2 flow of water pump be the flow target value that needs the simulation, and II 7 flow of water pump equals with I2's of water pump completely, realize measuring device's long-time continuous operation, the data volume that obtains is more, and data are more reliable.
When the automatic heat pump is in practical use, after a power supply is started, bathing waste hot water is pumped into the pipeline I8 from the waste water collecting tank 1 by the water pump I2, at the moment, the pipeline I8 is in a state of being full of waste hot water, the flow meter 3 measures the flow, the waste hot water passes through the pipeline II 9 and freely falls into the buffer water tank 6 in the pipeline III 10, the pipeline III 10 is in a state of being full of water or not being full of water, the temperature detectors I4 and II 5 respectively measure the temperature to obtain the temperature difference, the water pump II 7 pumps the waste hot water back into the waste water collecting tank 1 again, the next round of heat loss measurement can be carried out, and the heat loss value of the pipeline can be obtained according to the temperature difference and the flow value.
The pipeline I8 and the pipeline III 10 are communicated, and the amount of the waste heat water passing through the pipeline I8 and the pipeline III 10 in unit time is the same, so that the method for measuring the heat loss of the pipeline is feasible.
Claims (4)
1. The utility model provides a waste water pipeline heat loss simulation test device which characterized in that: by waste water collecting box, water pump I, the flowmeter, the thermodetector I, thermodetector II, surge tank, water pump II is constituteed, waste water collecting box and I tube coupling of water pump, water pump I adopts "U" venturi tube way connection down with surge tank, the flowmeter is installed on the "U" venturi tube way of falling of water pump I one side, thermodetector I, the thermodetector II is installed respectively in the "U" venturi tube way peak and the minimum of surging tank one side, water pump II respectively with waste water collecting box, surge tank tube coupling.
2. A simulated test apparatus for thermal loss in a wastewater line according to claim 1, characterised in that: the inverted U-shaped pipeline consists of a pipeline I, a pipeline II and a pipeline III, wherein the pipeline I and the pipeline III are vertically arranged, and the pipeline II is horizontally arranged and is respectively connected with the pipeline I and the pipeline III; the pipeline I is connected with the water pump I, and the pipeline III is connected with the buffer water tank; pipeline I, II pipe diameters of pipeline are the same, all are less than pipeline III's pipe diameter.
3. A simulated test apparatus for thermal loss in a wastewater line according to claim 1, characterised in that: the waste water collecting tank is a water tank which is heated by adopting electric heating or heat pump circulation.
4. A waste water pipeline heat loss simulation test apparatus as claimed in claim 1, wherein: through flow control device for I flow of water pump is the flow target value that needs the simulation, and the flow of water pump II is equal completely with I flow of water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331377.5A CN115128118A (en) | 2021-03-29 | 2021-03-29 | Waste water pipeline heat loss simulation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331377.5A CN115128118A (en) | 2021-03-29 | 2021-03-29 | Waste water pipeline heat loss simulation test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115128118A true CN115128118A (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110331377.5A Pending CN115128118A (en) | 2021-03-29 | 2021-03-29 | Waste water pipeline heat loss simulation test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115128118A (en) |
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2021
- 2021-03-29 CN CN202110331377.5A patent/CN115128118A/en active Pending
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