CN107560470A - A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system - Google Patents

A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system Download PDF

Info

Publication number
CN107560470A
CN107560470A CN201710933670.2A CN201710933670A CN107560470A CN 107560470 A CN107560470 A CN 107560470A CN 201710933670 A CN201710933670 A CN 201710933670A CN 107560470 A CN107560470 A CN 107560470A
Authority
CN
China
Prior art keywords
flow
heat
temperature
electric
concurrent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710933670.2A
Other languages
Chinese (zh)
Inventor
师涌江
白雪
孔婵
郑惠丹
程鹏月
刘锦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei University of Architecture
Original Assignee
Hebei University of Architecture
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei University of Architecture filed Critical Hebei University of Architecture
Priority to CN201710933670.2A priority Critical patent/CN107560470A/en
Publication of CN107560470A publication Critical patent/CN107560470A/en
Pending legal-status Critical Current

Links

Landscapes

  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system, comprise the following steps：Power, flow system flow and flow velocity are certain, temperature detection, calculate that big small the cold fluid and hot fluid entrance temperature difference, system calorific requirement, co-current flow, system calorific requirement, counter-current flow, system calorific requirement be moderate, counter-current flow.For the present invention in the case where system calorific requirement is small, using the type of flow of following current, SR is small, reduces unnecessary energy loss, stabilization safe for operation.The present invention is in the case where system calorific requirement is big, and using the type of flow of adverse current, mean temperature difference is big, improves heat exchanger heat exchange efficiency, meets system heat demand.Following current, adverse current checker in the present invention, avoid high temperature from concentrating on heat exchanger one end all the time, extend heat exchanger service life.According to the change of actual conditions, the flexible flow direction for changing heat exchanger fluid, the respective advantage of concurrent-countercurrent is given full play to, energy-saving effect is obvious, has good economic benefit and social benefit.

Description

A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system
Technical field
The invention belongs to a kind of heat-exchange method, and in particular to a kind of heat exchange side of adjustable concurrent-countercurrent mode high efficient heat exchanging system Method.
Background technology
Cold and hot two fluid is exchanged heat along heat-transfer area in heat exchanger, and its temperature is along flow direction constantly change, and temperature difference is not yet Disconnected change.The type of flow of the fluid in heat exchanger includes following current and adverse current.
The identical referred to as following current of cold and hot fluid PARALLEL FLOW and direction.Heat exchanger down current arrangement has that mean temperature difference is smaller, changes The characteristics of hot area is greatly and cold fluid outlet temperature is less than hot fluid outlet temperature.But co-current flow causes the temperature end of cold fluid Temperature end with hot fluid is not in the too high phenomenon of heat exchanger side wall temperature not in homonymy.
Cold and hot fluid PARALLEL FLOW but referred to as adverse current in opposite direction.In the situation of identical out temperature and heat output Under, because the MTD of adverse current is more than following current, the heat transfer area that is needed it was found from Heat transfer equation Q=KA △ t, during adverse current To be small during than following current；Difference variation is more uniform during adverse current, is advantageous to the stabilization of equipment.Between counter-current flow fluid relative velocity compared with Big and cold fluid outlet temperature is not necessarily by lower than the outlet temperature of hot fluid.But during adverse current, the maximum temperature of fluid and most cold Temperature concentrates on the both ends of heat exchanger, heat exchanging device structure respectively；Counter-flow heat exchanger is complicated, and resistance is bigger.
At present, there is its insoluble drawback in the heat exchange mode of following current or adverse current, and fundamentally restricts it and change Hot property.
The content of the invention
The present invention proposes to solve the problems, such as that prior art is present, high the purpose is to provide a kind of adjustable concurrent-countercurrent mode Imitate the heat-exchange method of heat-exchange system.
The technical scheme is that：A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system, including it is following Step：
I power, flow system flow and flow velocity are certain
It is certain in power, flow system flow and flow velocity it is certain in the case of, determine calorific requirement according to actual.
II temperature detections
Detect the gateway temperature of exchanger heat fluid and the gateway temperature of heat exchanger cold fluid respectively by temperature sensor Degree.
III calculates the cold fluid and hot fluid entrance temperature difference
The temperature information detected in controller receiving step II, and the cold fluid and hot fluid entrance temperature difference is calculated, and judge that system needs heat Amount, step IV or step VI or step VIII are performed according to system calorific requirement.
IV system calorific requirements are small
In the case that system calorific requirement is small, the advantage in flow field is paid the utmost attention to, and performs step V.
V co-current flows
Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on following current pipeline, realizes downstream heat transfer.
VI system calorific requirements are big
In the case that system calorific requirement is big, the advantage in temperature field is paid the utmost attention to, and performs step VII.
VII counter-current flows
Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow.
VIII system calorific requirements are moderate
In the case that system calorific requirement is moderate, counter-current flow mode preferentially is used, and perform step IV.
IV counter-current flows
Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow.
In the step VII, as hot fluid inlet temperature is very high, and the regular hour is continue for, from heat exchanger service life Angle considers, co-current flow work a period of time, then proceedes to counter-current flow.
In the step IV, as hot fluid inlet temperature is very high, and the regular hour is continue for, from heat exchanger service life Angle considers, co-current flow work a period of time, then proceedes to counter-current flow.
In the step IV, such as cold fluid and hot fluid entrance temperature difference very little, co-current flow work a period of time, adverse current is then proceeded to Flowing.
No. I temperature sensor detection hot fluid inlet temperature, No. II temperature sensor detect hot fluid in the step II Outlet temperature.
No. III temperature sensor detection cold fluid outlet temperature, No. IV temperature sensor detect cold fluid in the step II Inlet temperature.
Following current pipeline includes No. II oral siphon, No. II outlet pipe connected with heat exchanger in the V, and described No. II enters water Pipe connects with No. I electric T-shaped valve, and No. II outlet pipe connects with No. II electric T-shaped valve.
Adverse current pipeline includes No. I oral siphon, No. I outlet pipe that connects with heat exchanger in the VII, No. I oral siphon and No. I electric T-shaped valve connection, No. I outlet pipe connect with No. II electric T-shaped valve.
No. I electric T-shaped valve other end flows into pipe with hot-fluid and connected, No. II electric T-shaped valve other end and heat Flow back to flow tube connection.
The present invention is in the case where system calorific requirement is little, and using the type of flow of following current, SR is small, and reduction need not The energy loss wanted, stabilization safe for operation.
The present invention is in the case where system calorific requirement is big, and using the type of flow of adverse current, mean temperature difference is big, improves heat exchanger Heat exchange efficiency, meet system heat demand.
Following current, adverse current checker in the present invention, avoid high temperature from concentrating on heat exchanger one end all the time, extend heat exchanger and use Life-span.
The present invention the flexible flow direction for changing heat exchanger fluid, is given full play to along inverse according to the change of actual conditions Respective advantage is flowed, energy-saving effect is obvious, has good economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is the connection diagram of the present invention；
Fig. 2 is flow chart of the method for the present invention；
Wherein：
The controller of 1 heat exchanger 2
3 hot-fluids flow into the hot fluid return pipe of pipe 4
The cold flow of 5 cold fluid return pipe 6 flows into pipe
7 No. I electric T-shaped valves, 8 No. II electric T-shaped valves
9 No. I temperature sensors, 10 No. II temperature sensors
11 No. III temperature sensors, 12 No. IV temperature sensors
13 No. I oral siphons, 14 No. II oral siphons
15 No. I outlet pipes, 16 No. II outlet pipes.
Embodiment
Hereinafter, referring to the drawings and embodiment the present invention is described in detail：
As shown in Figure 1 and 2, a kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system, comprises the following steps：
I power, flow system flow and flow velocity are certain
It is certain in power, flow system flow and flow velocity it is certain in the case of, determine calorific requirement according to actual.
II temperature detections
Detect the gateway temperature of the hot fluid of heat exchanger 1 and the gateway temperature of heat exchanger cold fluid respectively by temperature sensor Degree.
III calculates the cold fluid and hot fluid entrance temperature difference
The temperature information detected in the receiving step II of controller 2, and the cold fluid and hot fluid entrance temperature difference is calculated, and judge that system needs heat Amount, step IV or step VI or step VIII are performed according to system calorific requirement.
IV system calorific requirements are small
In the case that system calorific requirement is small, the advantage in flow field is paid the utmost attention to, and performs step V.
V co-current flows
Controller 2 controls 7, No. II electric T-shaped valves 8 of No. I electric T-shaped valve, turns on following current pipeline, realizes downstream heat transfer.
VI system calorific requirements are big
In the case that system calorific requirement is big, the advantage in temperature field is paid the utmost attention to, and performs step VII.
VII counter-current flows
Controller 2 controls 7, No. II electric T-shaped valves 8 of No. I electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow.
VIII system calorific requirements are moderate
In the case that system calorific requirement is moderate, counter-current flow mode preferentially is used, and perform step IV.
IV counter-current flows
Controller 2 controls 7, No. II electric T-shaped valves 8 of No. I electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow.
In the step VII, as hot fluid inlet temperature is very high, and the regular hour is continue for, from heat exchanger service life Angle considers, co-current flow work a period of time, then proceedes to counter-current flow.
In the step IV, as hot fluid inlet temperature is very high, and the regular hour is continue for, from heat exchanger service life Angle considers, co-current flow work a period of time, then proceedes to counter-current flow.
In the step IV, such as cold fluid and hot fluid entrance temperature difference very little, co-current flow work a period of time, adverse current is then proceeded to Flowing.
No. I temperature sensor detection hot fluid inlet temperature, No. II temperature sensor detect hot fluid in the step II Outlet temperature.
No. III temperature sensor detection cold fluid outlet temperature, No. IV temperature sensor detect cold fluid in the step II Inlet temperature.
Following current pipeline includes 14, No. II outlet pipes 16 of No. II oral siphon for being connected with heat exchanger 1 in the V, described No. II Oral siphon 14 connects 7 with No. I electric T-shaped valve, and No. II outlet pipe 16 connects with No. II electric T-shaped valve 8.
Adverse current pipeline includes 13, No. I outlet pipes 15 of No. I oral siphon connected with heat exchanger in the VII, and described No. I enters water Pipe 13 connects with No. I electric T-shaped valve 7, and No. I outlet pipe 15 connects with No. II electric T-shaped valve 8.
No. I other end of electric T-shaped valve 7 and hot-fluid flow into pipe 3 and connected, No. II other end of electric T-shaped valve 8 with Hot fluid return pipe 4 connects.
The step V co-current flow makes the flow direction of hot fluid identical with the flow direction of cold fluid, reduces flowing Resistance.
Step VII and step the IV counter-current flow makes the flow direction of hot fluid and the flow direction of cold fluid on the contrary, filling The advantages of its heat exchange efficiency is high is waved in distribution.
Hot-fluid flows into pipe 3 and connected with No. I electric T-shaped valve 7 in the present invention, hot fluid return pipe 4 and No. II electric T-shaped valve 8 Connection.
The 7 other both ends of No. I electric T-shaped valve connect with 13, No. II oral siphons 14 of No. I oral siphon respectively, described No. I 13, No. II oral siphons 14 of oral siphon connect with heat exchanger 1.
The 8 other both ends of No. II electric T-shaped valve connect with 15, No. II outlet pipes 16 of No. I outlet pipe respectively, described No. I 15, No. II outlet pipes 16 of outlet pipe connect with heat exchanger 1.
The cold flow flows into pipe 6, cold fluid return pipe 5 connects with the opposite side of heat exchanger 1.
The cold flow is flowed into pipe 6 and is provided with No. IV temperature sensor 12, and No. III temperature is provided with the cold fluid return pipe 5 Spend sensor 11.Described 12, No. III 11 equal circuits of temperature sensor of No. IV temperature sensor are linked into controller 2.
The hot-fluid is flowed into pipe 3 and is provided with No. I temperature sensor 9, and No. II temperature is provided with the hot fluid return pipe 4 Sensor 10, described 9, No. II 10 equal circuits of temperature sensor of No. I temperature sensor are linked into controller 2.
The present invention is in the case where system calorific requirement is little, and using the type of flow of following current, SR is small, and it is unnecessary to reduce Energy loss, stabilization safe for operation.
The present invention is in the case where system calorific requirement is big, and using the type of flow of adverse current, mean temperature difference is big, improves heat exchanger Heat exchange efficiency, meet system heat demand.
Following current, adverse current checker in the present invention, avoid high temperature from concentrating on heat exchanger one end all the time, extend heat exchanger and use Life-span.
The present invention the flexible flow direction for changing heat exchanger fluid, is given full play to along inverse according to the change of actual conditions Respective advantage is flowed, energy-saving effect is obvious, has good economic benefit and social benefit.

Claims (9)

  1. A kind of 1. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system, it is characterised in that：Comprise the following steps：
    （ⅰ）Power, flow system flow and flow velocity are certain
    It is certain in power, flow system flow and flow velocity it is certain in the case of, determine calorific requirement according to actual；
    （ⅱ）Temperature detection
    Detect the gateway temperature of exchanger heat fluid and the gateway temperature of heat exchanger cold fluid respectively by temperature sensor Degree；
    （ⅲ）Calculate the cold fluid and hot fluid entrance temperature difference
    Controller receiving step（ⅱ）The temperature information of middle detection, and the cold fluid and hot fluid entrance temperature difference is calculated, and judge that system needs Heat, step is performed according to system calorific requirement（ⅳ）Or step（ⅵ）Or step（ⅷ）；
    （ⅳ）System calorific requirement is small
    In the case that system calorific requirement is small, the advantage in flow field is paid the utmost attention to, and performs step（ⅴ）；
    （ⅴ）Co-current flow
    Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on following current pipeline, realizes downstream heat transfer；
    （ⅵ）System calorific requirement is big
    In the case that system calorific requirement is big, the advantage in temperature field is paid the utmost attention to, and performs step（ⅶ）；
    （ⅶ）Counter-current flow
    Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow；
    （ⅷ）System calorific requirement is moderate
    In the case that system calorific requirement is moderate, counter-current flow mode preferentially is used, and perform step（ⅸ）；
    （ⅸ）Counter-current flow
    Controller controls No. I electric T-shaped valve, No. II electric T-shaped valve, turns on adverse current pipeline, realizes countercurrent flow.
  2. A kind of 2. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： The step（ⅶ）In, as hot fluid inlet temperature is very high, and the regular hour is continue for, examined from heat exchanger service life angle Consider, co-current flow work a period of time, then proceed to counter-current flow.
  3. A kind of 3. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： The step（ⅸ）In, as hot fluid inlet temperature is very high, and the regular hour is continue for, examined from heat exchanger service life angle Consider, co-current flow work a period of time, then proceed to counter-current flow.
  4. A kind of 4. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： The step（ⅸ）In, such as cold fluid and hot fluid entrance temperature difference very little, co-current flow work a period of time, then proceed to counter-current flow.
  5. A kind of 5. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： The step（ⅱ）In No. I temperature sensor detection hot fluid inlet temperature, No. II temperature sensor detect hot fluid outlet ports temperature Degree.
  6. A kind of 6. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： The step（ⅱ）In No. III temperature sensor detection cold fluid outlet temperature, No. IV temperature sensor detect cold fluid inlet temperature Degree.
  7. A kind of 7. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： It is described（ⅴ）Middle following current pipeline includes No. II oral siphon, No. II outlet pipe that are connected with heat exchanger, No. II oral siphon and No. I Electric T-shaped valve connects, and No. II outlet pipe connects with No. II electric T-shaped valve.
  8. A kind of 8. heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 1, it is characterised in that： It is described（ⅶ）Middle adverse current pipeline includes No. I oral siphon, No. I outlet pipe connected with heat exchanger, No. I oral siphon and No. I electricity Dynamic triple valve connection, No. I outlet pipe connect with No. II electric T-shaped valve.
  9. 9. the heat-exchange method of any one adjustable concurrent-countercurrent mode high efficient heat exchanging system according to claim 7 or 8, it is special Sign is：No. I electric T-shaped valve other end flows into pipe with hot-fluid and connected, No. II electric T-shaped valve other end and hot-fluid Return duct connects.
CN201710933670.2A 2017-10-10 2017-10-10 A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system Pending CN107560470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710933670.2A CN107560470A (en) 2017-10-10 2017-10-10 A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710933670.2A CN107560470A (en) 2017-10-10 2017-10-10 A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system

Publications (1)

Publication Number Publication Date
CN107560470A true CN107560470A (en) 2018-01-09

Family

ID=60985323

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710933670.2A Pending CN107560470A (en) 2017-10-10 2017-10-10 A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system

Country Status (1)

Country Link
CN (1) CN107560470A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110823616A (en) * 2019-11-21 2020-02-21 青岛大学 Desktop type self-supply water heat exchanger performance testing device
CN115265067A (en) * 2022-06-28 2022-11-01 大力神铝业股份有限公司 Vertical distribution's double-chamber formula cooling trough system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102150003A (en) * 2008-09-23 2011-08-10 阿尔斯通技术有限公司 Tubular heat exchanger for controlling a wide performance range

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102150003A (en) * 2008-09-23 2011-08-10 阿尔斯通技术有限公司 Tubular heat exchanger for controlling a wide performance range

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈雅梅: "《石油技工学校试用教材 热工理论基础》", 31 May 1988, 石油工业出版社 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110823616A (en) * 2019-11-21 2020-02-21 青岛大学 Desktop type self-supply water heat exchanger performance testing device
CN110823616B (en) * 2019-11-21 2021-04-27 青岛大学 Desktop type self-supply water heat exchanger performance testing device
CN115265067A (en) * 2022-06-28 2022-11-01 大力神铝业股份有限公司 Vertical distribution's double-chamber formula cooling trough system
CN115265067B (en) * 2022-06-28 2024-02-20 大力神铝业股份有限公司 Vertical-distribution double-cavity cooling water tank system

Similar Documents

Publication Publication Date Title
CN105953202B (en) System and method occurs for a kind of sensible heat heat accumulating type live (open) steam based on regulation of series
CN101871706B (en) Phase-change energy-storage heat pump water heater
CN104848540A (en) Primary heating type heat pump water heater and control method thereof
CN102661672A (en) Energy-saving plate heat exchanger unit and control method thereof
CN106767115B (en) heat exchanger tube and heat exchanger
CN102374655B (en) Air energy heat pump and water-heating integrated device
CN109781782A (en) A kind of desktop type self-water-supplying heat exchanger performance test device
CN204665986U (en) A kind of energy-conservation board-like heat-exchanger
CN107560470A (en) A kind of heat-exchange method of adjustable concurrent-countercurrent mode high efficient heat exchanging system
CN105091640B (en) A kind of domestic hot-water's plate-type heat-exchange unit
CN107560471A (en) A kind of high efficient heat exchanging system of adjustable concurrent-countercurrent mode
CN100478818C (en) Cooling-liquid temperature adjuster of engine
CN106739931A (en) A kind of heating heat-exchange system of automobile
CN201166447Y (en) Hot water generating apparatus and heat pump hot water system with the same
CN206113731U (en) Heat exchanger with high -efficient heat transfer
CN206291532U (en) Produce the multi-level condensation heat pumping system of high-temperature-hot-water
CN203880864U (en) Heat exchange system for air conditioner and water heater
CN209782784U (en) geothermal and hanging piece mixed heat supply type adjusting system
CN108072088A (en) A kind of central heating secondary network electric heating pump peak regulation system
CN208170493U (en) A kind of municipal administration heating system
CN208805078U (en) A kind of double-tube heat exchanger with refrigerant compensator
CN208520044U (en) A kind of energy-saving type air energy heat exchanger
CN106403333A (en) Energy-saving heat exchange system for refrigerator
CN201159526Y (en) Silicon nitride heating type water heater
CN206269207U (en) A kind of heating system of recirculated water automatic-discharging

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20180109

RJ01 Rejection of invention patent application after publication