EP2946118B1 - Energy-efficient tunnel ventilation device - Google Patents

Energy-efficient tunnel ventilation device Download PDF

Info

Publication number: EP2946118B1
Authority: EP; European Patent Office
Prior art keywords: nozzle; fan; tunnel; trailing edge; centreline
Prior art date: 2013-01-17
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.): Active

Application number

EP14705379.7A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP2946118A1 (en

Inventor

Fathi Tarada

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.)

Mosen Ltd

Original Assignee

Mosen Ltd

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.)

2013-01-17

Filing date

2014-01-17

Publication date

2021-03-03

2014-01-17 Application filed by Mosen Ltd filed Critical Mosen Ltd

2015-11-25 Publication of EP2946118A1 publication Critical patent/EP2946118A1/en

2021-03-03 Application granted granted Critical

2021-03-03 Publication of EP2946118B1 publication Critical patent/EP2946118B1/en

Status Active legal-status Critical Current

2034-01-17 Anticipated expiration legal-status Critical

Images

Classifications

- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
- E21F1/085—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators using compressed gas injectors
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts

Definitions

jetfans Longitudinal ventilation via jetfans is generally acknowledged as being a cost-effective solution for tunnels, where the length and risk profile of the tunnel allows such an installation.
jetfans are not particularly energy efficient, with typical installations wasting over half the supplied electrical power.
a previous patent GB2465261 granted to the present Applicant describes convergent nozzles that can be installed on one or both sides of jetfans, in order to accelerate the tunnel air and turn it away from the tunnel surfaces.
this invention has been implemented by fitting conical nozzles onto jetfans.
JP-A-H1-237400 discloses a jetfan with an undercut on the lower side of the cylindrical casing, to encourage the discharged air to turn away from the tunnel soffit.
the nozzle trailing edge is shaped as an ellipse, it is not feasible to attach bellmouths on the nozzle trailing edges, which in turn implies significant pressure losses.
the nozzle is straight and hence there is no effective turning of the discharged air.
JP01130099A discloses an arrangement with multiple fans connected in parallel, delivering flow to a common plenum which in turn supplies air to a nozzle fitted with turning vanes. This complex arrangement is not suitable for most tunnels, which are ventilated using individual jetfans.
Applicant's earlier application no. US 2011/2755302 discloses a tunnel ventilation device with a convergent nozzle arrangement.
a fan assembly for installation in a tunnel to provide ventilation in the tunnel according to claim 1.
the flow through a jetfans is driven by an axial fan, which gives an impulse to the tunnel airflow.
the invention provides a solution to the technical issue of how to turn the flow from a jetfan away from the surrounding tunnel surfaces and hence achieve greater in-tunnel aerodynamic thrust, without choking the flow through the jetfan through increased pressure losses.
the first aspect of the invention is achieved by tilting the trailing edge of the nozzle, so that one side of the nozzle (the 'pressure side') is longer than the opposite side (the 'suction side').
the pressure side of the nozzle is termed thus because when the nozzle is placed on the discharge side of the jetfan, the pressure side 'pushes' the airflow away from the tunnel surrounding surfaces when the jetfan is in use. The pressure side would thus experience a static pressure that is greater than that on the opposite suction side.
tilting the trailing edge of the nozzle has the effect of increasing the aerodynamic throat of the nozzle, and hence reducing the pressure drop through the nozzle throughbore.
the power consumption of the jetfan is thus significantly reduced.
the range of angles between the trailing edge and the nozzle centre line has been selected on the basis of experimental evidence with the design, manufacture and testing of such jetfans.
the lower value of 45 degrees for the angle between the trailing edge and the nozzle centre line corresponds to a throughbore to fan area ratio of approximately 1.4, which would significantly choke most jetfan impellers.
the higher value of 85 degrees for the angle between the trailing edge and the nozzle centre line corresponds to the minimum change from a conventional jetfan nozzle arrangement that our experience indicates would be commercially beneficial to produce.
the present invention permits the selection of a standard bellmouth size which can be installed at a tilt to the nozzle centre-line.
a bellmouth with the same nominal diameter as the fan on which the nozzle is to be installed can be used. This option to use standard jetfan parts is a key advantage of the present invention.
the nozzle can typically be used for acoustic silencing, as well as for turning the discharged flow away from the tunnel surrounding surfaces. From previous laboratory measurements, it has been established that the performance of the silencer is dependent upon the solid angle subtended by the silencer surface onto the fan outlet. Through judicious choice of nozzle geometry, adequate acoustic silencing can be achieved, given the occlusion of the fan outlet by the nozzle 'pressure side'.
the arrangement of the circular fan outlet connected to a tilted bellmouth typically leads to a non-conical shape for the nozzle, and a complex developed shape for the nozzles skins is required for sheet metal cutting.
the shape of the proposed nozzle is thus different from the shapes envisaged in GB2465261 and JP-A-H1-237400 .
the nozzle trailing edge is shaped as an ellipse, it is not feasible to attach bellmouths on the nozzle trailing edges, which in turn implies significant pressure losses.
the nozzle is straight and hence there is no effective turning of the discharged air. That prior art design therefore does not provide a practical or efficient solution for tunnel ventilation.
FIG. 1 shows a side view of an embodiment of the present invention within a bidirectional ventilation apparatus, which is designed to operate in a fully reversible manner.
a fan assembly comprising a fan rotor (3) driven by a motor (4) is installed within a fan housing (15). Airflow (5) enters the fan rotor (3) through a bellmouth (1) and an inlet nozzle throughbore (10A), before being discharged thorough an outlet nozzle throughbore (10B).
the nozzle has a centreline (8), defined as the geometric mean between the pressure side (11) and suction side (12) lines.
An angle (13) is defined between the fan centreline (7) and the nozzle centreline (8).
the pressure side of the nozzle (11) is arranged to turn the flow direction, so that in use, the discharged air flows away from the surrounding tunnel surfaces.
a further angle (16) is defined between the nozzle centreline (8) and a trailing edge (6) of the nozzle.
the angle (16) is between 45 degrees and 85 degrees.
the angle (16) is approximately 65 degrees.
FIG. 1 shows a nozzle pressure side angle (17) of 7 degrees.
a larger geometric throat (14) can be arranged at both the inlet and discharge sides of the nozzle, by tilting the nozzle trailing edge (6) by the angle (16) between the nozzle centreline (8) and the trailing edge (6). This leads to reduced pressure losses and improved energy efficiency.
the throughbore areas at the inlet and discharge can be arranged to be equal to, or greater than, the fan area. Depending on the fan flow characteristics, this flexibility can increase the efficiency of the fan assembly.
the present invention relieves the 'choking' of the inlet flow which can be present in GB2465261 , and thus delivers a significant improvement in fan performance.
Fig. 4 shows the flat developed pattern for a nozzle skin which is to be cut from sheet metal, for the jetfan depicted in Figs. 1 and 2 .
the present invention requires a single direction of curvature for the nozzle skins, and the nozzle skins can therefore be developed from a flat sheet without the need for stretching.
the topology of the nozzle skins in this invention is therefore particularly suitable for sheet-metal manufacture.
the nozzle skin can be rolled from a single flat sheet of metal for small fan diameters (around 500mm), while separate sections of nozzle skin, each rolled from a flat sheet, are required for larger fan diameters of up to 2m.
Both the inner and outer nozzle skins can be rolled into the requisite shapes, with acoustic material inserted between them for sound attenuation during fan operation.

Landscapes

Engineering & Computer Science (AREA)
Mining & Mineral Resources (AREA)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Geology (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Fluid Mechanics (AREA)
Structures Of Non-Positive Displacement Pumps (AREA)
Ventilation (AREA)
Jet Pumps And Other Pumps (AREA)
Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)

EP14705379.7A 2013-01-17 2014-01-17 Energy-efficient tunnel ventilation device Active EP2946118B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB1300855.2A GB2509928A (en)	2013-01-17	2013-01-17	Tunnel ventilation fan and nozzle assembly
PCT/GB2014/000013 WO2014111679A1 (en)	2013-01-17	2014-01-17	Energy-efficient tunnel ventilation device

Publications (2)

Publication Number	Publication Date
EP2946118A1 EP2946118A1 (en)	2015-11-25
EP2946118B1 true EP2946118B1 (en)	2021-03-03

Family

ID=47843500

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP14705379.7A Active EP2946118B1 (en)	2013-01-17	2014-01-17	Energy-efficient tunnel ventilation device

Country Status (11)

Country	Link
US (1)	US20160025105A1 (es)
EP (1)	EP2946118B1 (es)
JP (1)	JP2016509640A (es)
KR (1)	KR20150105974A (es)
AU (1)	AU2014206641A1 (es)
CA (1)	CA2897643A1 (es)
DK (1)	DK2946118T3 (es)
ES (1)	ES2880801T3 (es)
GB (2)	GB2509928A (es)
MX (1)	MX2015009273A (es)
WO (1)	WO2014111679A1 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2562091A (en) *	2017-05-04	2018-11-07	Mosen Ltd	Optimised tunnel ventilation device
GB2562263A (en) *	2017-05-10	2018-11-14	Mosen Ltd	Bellmouth for jetfan
KR20240093882A (ko) *	2017-05-04	2024-06-24	모젠 엘티디	최적화된 터널 환기 장치
CN106907176A (zh) *	2017-05-10	2017-06-30	杨宏俊	一种煤矿用瓦斯自动压风稀释装置
CN109185200B (zh) *	2018-11-12	2020-04-24	杨逢春	一种煤矿局部通风机自动导风装置及其使用方法
CN110360153A (zh) *	2019-06-23	2019-10-22	北京交通大学	一种隧道通风风机
CN110630308A (zh) *	2019-09-05	2019-12-31	常州大学	一种煤矿井用压裂单井多分支压缩空气储能通风系统
DE102019220089A1 (de) *	2019-12-18	2021-02-04	W & S Management Gmbh & Co. Kg	Düsenelement für einen Strahlventilator und Strahlventilator
CN111535846B (zh) *	2020-06-22	2022-04-26	于晓晓	一种隧道施工用能稳定风流的方法
DE102023107502A1 (de) *	2023-03-24	2024-09-26	W & S Management Gmbh & Co. Kg	Mantelrohform zum Herstellen einer Strömungsumlenkeinheit

Citations (4)

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Publication number	Priority date	Publication date	Assignee	Title
JPH01130099A (ja) *	1987-11-12	1989-05-23	Fuji Electric Co Ltd	トンネル換気装置
JPH01237400A (ja) *	1988-03-18	1989-09-21	Hitachi Ltd	可逆式軸流送風機
JPH1123032A (ja) *	1997-06-30	1999-01-26	Mitsubishi Heavy Ind Ltd	トンネル換気用ファン装置
WO2008125553A1 (de) *	2007-04-16	2008-10-23	Napier Turbochargers Limited	Brennkraftmaschine

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Publication number	Priority date	Publication date	Assignee	Title
DE19920513A1 (de) *	1999-05-05	2000-11-09	Witt & Sohn Gmbh & Co	Strahlventilator
NL1018285C2 (nl) *	2001-06-13	2003-01-13	J A M Speulman Beheer B V	Ventilatiesysteem.
DE102004041696B4 (de) *	2004-08-28	2006-11-30	Wolter Gmbh & Co. Kg	Jetventilator
GB2479082A (en) *	2008-10-24	2011-09-28	Fathi Tarada	Tunnel Ventilation Fan Nozzle
GB0819608D0 (en) *	2008-10-24	2008-12-03	Mosen Ltd	Improved tunnel ventilation device

2013
- 2013-01-17 GB GB1300855.2A patent/GB2509928A/en not_active Withdrawn
2014
- 2014-01-17 MX MX2015009273A patent/MX2015009273A/es unknown
- 2014-01-17 KR KR1020157021405A patent/KR20150105974A/ko not_active Application Discontinuation
- 2014-01-17 GB GB1400773.6A patent/GB2512181B/en not_active Expired - Fee Related
- 2014-01-17 ES ES14705379T patent/ES2880801T3/es active Active
- 2014-01-17 WO PCT/GB2014/000013 patent/WO2014111679A1/en active Application Filing
- 2014-01-17 AU AU2014206641A patent/AU2014206641A1/en not_active Abandoned
- 2014-01-17 CA CA2897643A patent/CA2897643A1/en not_active Abandoned
- 2014-01-17 JP JP2015553151A patent/JP2016509640A/ja active Pending
- 2014-01-17 EP EP14705379.7A patent/EP2946118B1/en active Active
- 2014-01-17 US US14/760,933 patent/US20160025105A1/en not_active Abandoned
- 2014-01-17 DK DK14705379.7T patent/DK2946118T3/da active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01130099A (ja) *	1987-11-12	1989-05-23	Fuji Electric Co Ltd	トンネル換気装置
JPH01237400A (ja) *	1988-03-18	1989-09-21	Hitachi Ltd	可逆式軸流送風機
JPH1123032A (ja) *	1997-06-30	1999-01-26	Mitsubishi Heavy Ind Ltd	トンネル換気用ファン装置
WO2008125553A1 (de) *	2007-04-16	2008-10-23	Napier Turbochargers Limited	Brennkraftmaschine

Also Published As

Publication number	Publication date
GB2509928A (en)	2014-07-23
KR20150105974A (ko)	2015-09-18
EP2946118A1 (en)	2015-11-25
GB2512181B (en)	2017-06-07
DK2946118T3 (da)	2021-05-25
JP2016509640A (ja)	2016-03-31
AU2014206641A1 (en)	2015-08-06
ES2880801T3 (es)	2021-11-25
GB201300855D0 (en)	2013-03-06
GB2512181A (en)	2014-09-24
GB201400773D0 (en)	2014-03-05
WO2014111679A1 (en)	2014-07-24
CA2897643A1 (en)	2014-07-24
MX2015009273A (es)	2015-12-15
US20160025105A1 (en)	2016-01-28

Publication	Publication Date	Title
EP2946118B1 (en)	2021-03-03	Energy-efficient tunnel ventilation device
AU2018263370B2 (en)	2023-10-12	Optimised tunnel ventilation device
EP3321511A1 (en)	2018-05-16	Air blower and air conditioning device equipped with air blower
WO2014061094A1 (ja)	2014-04-24	ターボファンおよび空気調和機
US20080253896A1 (en)	2008-10-16	High efficiency fan blades with airflow-directing baffle elements
TW201804087A (zh)	2018-02-01	螺旋槳扇及流體輸送裝置
TW200624674A (en)	2006-07-16	Axial-flow heat-dissipating fan
GB2562263A (en)	2018-11-14	Bellmouth for jetfan
US20030039541A1 (en)	2003-02-27	Blower noise reducing device and a blower having same
CN105090075A (zh)	2015-11-25	节能隧道通风设备
GB2562091A (en)	2018-11-07	Optimised tunnel ventilation device
JP2006038443A (ja)	2006-02-09	送風ダクト
EP2937562A1 (en)	2015-10-28	Apparatus for dampening of acoustic noise generated by air-cooling of at least one wind turbine component provided with the nacelle of a wind turbine
JP2002242892A (ja)	2002-08-28	軸流フアン
GB1560684A (en)	1980-02-06	Fans having air flow guide arrangements
JP5168956B2 (ja)	2013-03-27	消音ボックス付送風機
WO2021259681A2 (en)	2021-12-30	Vortex generators for jet fans
CN201963612U (zh)	2011-09-07	轴流式风机防喘振装置
KR20240051599A (ko)	2024-04-22	팬, 및 그 팬을 사용하는 공조기
CN114962336A (zh)	2022-08-30	一种用于环保系统的通风装置
CN2592919Y (zh)	2003-12-17	射流诱导风机
CN114321014A (zh)	2022-04-12	一种离心压气机径向扩压器局部自循环流动控制结构
JP2013007288A (ja)	2013-01-10	ダクト排気を利用した風力発電装置
KR20150112199A (ko)	2015-10-07	원심팬

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