CN1238668C

CN1238668C - Geothermal heat exchanger

Info

Publication number: CN1238668C
Application number: CNB031207278A
Authority: CN
Inventors: 洲泽昭已
Original assignee: Mishawa Environment Technology K K
Current assignee: Mishawa Environment Technology K K
Priority date: 2002-04-15
Filing date: 2003-03-18
Publication date: 2006-01-25
Anticipated expiration: 2023-03-18
Also published as: JP2003307352A; CN1451928A

Abstract

Provided is an underground heat exchanger capable of effectively and economically collecting the underground heat. In this heat exchanger wherein a plurality of coaxial double pipes 1 respectively having an inner pipe of an outer diameter of 40-60 mm coaxially mounted in an outer pipe of an outer diameter of 80-100 mm, are vertically buried under the ground, and which collects the underground heat when the heat medium is supplied from upper end parts of the inner pipes 3, and reversed at lower end parts to be upwardly passed in the outer pipes 3, intervals D of the plurality of coaxial double pipes 1 are determined to be 5 m in minimum, and a flow rate of the heat medium is determined to be 20-25 litters per minute.

Description

Heat exchanger in ground

Technical field

The invention relates to all enriching in the ground of containing heat throughout the year the utilization of aspects such as raising of animal or snow melt and the heat exchanger in ground developed in air-conditioning, hot-water supply, warm water swimming pool, heat exchanger in ground plant culture.

Background technology

From very early, just consider to utilize the method for the heat energy of occurring in nature existence at aspects such as air-conditioning and hot-water supplies.For example from the underground hot water that draws, the utilization of heat energy at aspects such as air-conditioning and hot-water supplies that utilizes it is exactly an example wherein.But draw geothermal water in a large number and can produce the bigger environmental problem of the sagging grade of ground, this just makes it further not develop and to popularize.

So considering to gather method hot in the ground is the heat exchanger of burying underground with plural number underground that pipe constitutes of burying underground, buries underground at these and transmits thermal medium in pipe, and carry out heat exchange indirectly by the thermal conductive surface between the heat in thermal medium and the ground.This mode is because will consider can not bring out problems such as ground sink, and hot temperature is not high in the ground that exists in common area except that scabland, thus the economical and effective rate to collect sufficient underground heat be an individual very difficult problem.

Promptly plural number bury too approaching that pipe buries underground underground, it is just inevitable low to bury heat that Guan Suoneng gathers underground at each.Otherwise bury underground with certain interval, for connect each bury underground pipe certainly will will extend pipeline length and the pump of a plurality of necessity is installed, what will become like this is very uneconomical.

Summary of the invention

Therefore problems such as ground sink do not take place, and heat in the collection ground of economical and effective rate can just become our hope then in the appearance of the machine of aspect utilizations such as air-conditioning and hot-water supply.

The present inventor has adopted unique heat exchanger in view of this, and in conjunction with about to its configuration and the achievement in research of thermal medium flow, can be met result's product.The present invention on this result's basis, can provide can cost-effective collection ground in the heat exchanger in ground of heat.

Solve the method for this problem

Describe referring to figs. 1 through Fig. 2.About the said heat exchanger in ground of the present invention, be that to be inserted in external diameter with concentric form in the outer tube 2 of 80～100mm be that the concentric double pipe 1 that the interior pipe 3 of 40～60mm is constituted is vertically to be embedded in underground with plural form by external diameter, thermal medium begins to inject from the upper part of interior pipe 3, enter in the outer tube 2 and move upward in the counter-rotating of the end portion of pipe, by in gather the heat exchanger of underground heat, the interval D of the concentric double pipe of recording and narrating previously 1 is minimum will to be set at 5m, and is that the flow set of the thermal medium recorded and narrated previously is 20～25 liters of per minutes.

Description of drawings

Fig. 1 is the pie graph of expression heat exchanger in ground form of implementation of the present invention.

Fig. 2 is the concentric double pipe of form of implementation in the presentation graphs 1 and the front sectional drawing around it (expression be the expanded view of concentric double pipe).

Fig. 3 is the shown front sectional drawing of other form of implementation of the heat exchanger in ground that uses in the present invention.

Fig. 4 is the flow chart of the pump startup device of solar generating of relevant heat exchanger in ground of the present invention.

Symbol description

1 concentric double pipe 7 air bleeding valves

2 outer tubes, 8 pumps

Pipe 9 heat release pipes in 3

4 supply pipes, 10 silica sands

5 discharge pipe H heat insulation material material

6 ball valves, 12 clay

The specific embodiment

About the form of implementation of heat exchanger in ground among the present invention, extremely shown in Figure 2 by Fig. 1.This heat exchanger in ground be make by the polythene material of hard, external diameter be in the outer tube 2 of 90mm with concentric form be inserted in make by the polythene material of hard equally, external diameter is the concentric double pipe 1 that the interior pipe 3 of 56mm is constituted, this concentric double pipe 1 vertically is embedded in underground with plural form.

To be thermal medium begin to inject from the upper part of interior pipe 3 each concentric double pipe 1, enter outer tube 2 in and move upward in the end portion counter-rotating of pipe, by in the heat exchanger of collection underground heat.The interval D of the concentric double pipe 1 of plural number is set at 5m, and the flow set of thermal medium is 20 liters of per minutes.

Be provided with ball valve 6 and air bleeding valve 7 in addition on each concentric double pipe 1, pipe 3 is connected with the supply pipe 4 of thermal medium in it, and outer tube 2 is connected with discharge pipe 5.The concentric double pipe 1 of plural number all is connected with discharge pipe 5 with supply pipe 4, is provided with two thermal medium supply pumps of arranging side by side 8 at supply pipe 4, and wherein one as standby.Supply pipe 4 and discharge pipe 5 be installed in the road surface under, be connected with the heat release pipe 9 that needs melting road surface accumulated snow, the 26th, the flowmeter of installing.

After double pipe 1 inserts the hole that vertically gets out on the ground with one heart, fill around it with silicon husky 10, wrap up with heat insulation material material 11 on its top, heat insulation material material 11 usefulness clay 12 are fixing, and base concrete 13 is arranged in provided underground, building in the above has concrete wall 14, and with building 15 oversite concrete walls 14, this concrete inner wall is provided with the ascending stair 16 of spot check guarantee usefulness simultaneously.

Explanation about this heat exchanger in ground effect.Start pump 8, thermal medium in the thermal medium supply pipe 4 is sent in the interior pipe 3 of each concentric double pipe 1, pipe 3 in this, lower end part is turned back and is entered outer tube 2 (from the gap portion of interior pipe 3 and outer tube 2), keep this state to transmit then, at this moment gather underground heat by heat exchange to the upper part.

Collect the thermal medium of underground heat, arrive heat release pipe 9 by discharge pipe 5, and after this emits underground heat, send into concentric double pipe 1 by supply pipe 4 again.This circulation goes round and begins again, thereby has realized adopting heat and heat release replaces mutually, carry out continuously.

This ground exothermic heat pipe 9 is to provide thermal medium by being inserted in the concentric double pipe 1 that the interior pipe 3 of external diameter for 56mm constituted in the outer tube 2 of external diameter for 90mm, because the interval D of this concentric double pipe 1 is 5m, the flow set of thermal medium is 20 liters of per minutes, so can gather underground heat cost-effectively.

Incidentally, when the interval D of double pipe 1 is in 5m with one heart, because geotemperature is low excessively, so can not fully gather heat, if during in a single day greater than 5m, then needing to extend connects the plural supply pipe 4 of double pipe 1 with one heart and the length of discharge pipe 5, causes uneconomical practicality.To enlarge the external diameter of outer tube 2 and interior pipe 3 simultaneously so significantly, satisfy the setting that the thermal medium flow increases, otherwise just can not guarantee the abundant collection of heat.

More as shown in Figure 3 be that external diameter is that the center of tube body 18 of 80～100mm is by every producing the U font pipe 17 that is separated into two paths 20 from wall 19.Equally, the shortest 5m that is set in its interval, and the flow set of thermal medium is upgraded to suitable at per minute 20～25.

Pump 8 can also start by device of solar generating and internal combustion engine TRT except that using general source power supply in addition.Device of solar generating as shown in Figure 4, solar panel 21 absorbs sunshines, the battery in the accumulator box 22 24 is charged when needs charge by control substrate 23, by rectifier 25 electric weight of necessity is supplied to pump 8 again.

The effect of invention

Be outside 80～100mm based on exothermic heat pipe 9 in the said ground of the present invention by external diameter It is that the concentric double pipe 1 that the inner tube 3 of 40～60mm consists of vertically buries that pipe is inserted in external diameter in 2 Be located at undergroundly, and supply therein thermal medium and gather underground heat, and this concentric double pipe 1 The shortest 5m that is set in interval, if the flow set of thermal medium 20 liters of per minutes, that Just can receive the effect of economy, efficient collection underground heat.

Thereby when utilizing this underground heat, can by not bringing out the environmental problems such as ground sink, come Carry out air-conditioning, hot-water supply, warm water swimming pool, plant culture, the raising of animal or snow melt Etc. the work of aspect.

Claims

1. heat exchanger in ground, it is characterized in that, by external diameter is that to be inserted in external diameter with concentric form in the outer tube (2) of 80～100mm be that the concentric double pipe (1) that the interior pipe (3) of 40～60mm is constituted is vertically to be embedded in underground with plural form, thermal medium begins to inject from the upper part of interior pipe 3, enter in the outer tube (2) and move upward in the counter-rotating of the end portion of pipe, by in gather the heat exchanger of underground heat, the interval D of the concentric double pipe of recording and narrating previously (1) is minimum will to be set at 5m, and is that the flow set of the thermal medium recorded and narrated previously is 20～25 liters of per minutes.