Small hydro uye in-pipe hydro

Pakutanga kwemvura, michina yakashandiswa kushandura madziva kuita mabasa. Mazhinji ematunhu enyika uye marudzi akafanana neaya aripo. Hydropower iriwo yakakura kwazvo chigadzirwa chemagetsi anovandudzwa panyika, pamusoro pe15% yemagetsi epasi rose mu2023, zvikuru kubva kumahombekombe (Hydroelectricity). Iyi peji ndeyekutaura nezvenzvimbo dzese dzinogadzira simba: turbines dzinogona kuburitsa kubva kumakilowatts mashoma kusvika kumamegawatts mashoma mumvura, mabwe ekare, michina yekunwa madziro, uye mapurasitiki anotakura mvura inopisa kuenda kumaguta.

Sezvakaitwa pawebhusaiti yedu yekutsvaga ye Fan Wall, tinotanga nefizikisi, tichitarisa kuti ndezvipi zvirongwa zvechokwadi zvinomiririra uye zvazvinoda kubhadharwa zvichienzaniswa nechinhu chinokosha chedu, chivakwa chezuva pane imwe nzvimbo yezuva pamadhora 0.19 pa kWh. Chimwe chinhu chinonakidza: **madiki emvura anonyatsoshanda, ane hupenyu hwakareba uye anofamba nezuva, uye nzvimbo yakanaka inogona kukunda simba rezuva rakapetwa kaviri. Asi simba ndiro chete kubuda nguva drop, vakawanda mabwe uye midziyo inotipa chete zvishoma kilowatts, uye zvakajairika mari yezvikwereti, Civil Works uye zvekudya kuchengetedza sink akawanda madiki schemes. In-pipe hydro inoreva chete apo mweya unomanikidzwa kusvibiswa. **

Chii icho

“Small hydro” inotaura nezvemachina akasiyana-siyana, ayo anozivikanwa nemhando dzawo: small kusvika 10 MW, mini pasi pe1 MW kana 500 kW zvichienderana nenyika, micro pasi pe100 kW uye pico pasi pe5 kusvika 10 kW (Small hydro; Micro hydro). Anenge zvese izvi run-of-river: sezviri pachena, kwete semvura inochengetwa mumvura, asi semvura inobva mumatombo.

In-pipe kana conduit hydro inoisa maturbines mukati memvura yekuchengetedza nharaunda iyo yaivepo: madziro emvura ari kutenderera kubva kumaresitorendi, vaviriti avo vanoderedza tembiricha mushure mekunge madziro asvika kumahotera, miganhu yekunwa nemvura, uye zviwanikwa zvekushandisa. Hapana dambarefu idzva uye hapana kukwira kwemvura, izvo zvinoita kuti United States iise kunze kwezvirongwa zvemagetsi zvinosvika 5 MW kubva pahurumende yemutemo muna 2013.

Maitiro ekushanda

The one equation. A hydro turbine inoshandura simba remvura richibuda mumvura kuita magetsi. Power i P = ρ × g × Q × H × η, apo ρ ndiyo density yemvura (1,000 kg pa cubic meter), g ndeye gravity (9.81 m/s²), Q iyo flow mu cubic metres a second, H the head, kana height iyo madziro anobuda, mu metres, uye η efficiency yeturbine, generator nepiping pamwe chete. Semuenzaniso: imwechete-mhere yemvura inobuda munguva imwe chete inotakura 9.81 kW. Large turbines kushandura pamusoro 90% yezvo; zvidiki izvo zvinonyanya 50 kusvika 85% (Micro hydro).

Head and flow trade places. A mountain stream with a trickle of flow and a 100 m drop can deliver the same power as a lowland river with a hundred times the flow over a 1 m weir. Turbine inotevera nzvimbo:

• High head, low flow (mazana emamita): Pelton uye Turgo wheels, akasangana nemvura.
• Medium head: Francis uye crossflow turbines.
• Low head, high flow (1 kusvika 10 m): Kaplan propeller uye Archimedes screws, izvo zvinotenderera zvakaomarara, zvinopinda muzvicherwa uye zviri nyore kune zvekudya.
• Mumidziyo yemvura: zvishongedzo zvema turbines, kana standard pumps zvinofamba zvakadzikama sezvimwe ma turbines, izvo zviri kushandiswa zvakanyanya uye zvine mutengo wakaderera.

Pressure is head. Mumidziyo, kukwira kunoratidzwa se pressure: imwe bar inoenderana ne10.2 m yemusoro. Izvi ndizvo zvinokonzera kuwanda kwemvura mumidziyo. Migwagwa inochengeta madziro emvura pazvigaro zvishoma; apo mvura inobva kumahombekombe kubva kunzvimbo yemvura, mhepo ichave yakakwira kwazvo kune dzimba, saka kumanikidza-kuderedza vaviri inobvisa mvura yakawanda sekushisa uye nyoro. A turbine munzvimbo yekuti valve inodzosera. Mufananidzo we “valve mumvura” muenzaniso, 0.3 cubic metres pasecond pamusoro pe3 bar, ndeyekusvika 60 kW iyo kana ichishandiswa zvakaipa.

Hapana chikafu chekudya chemahara mumvura. Turbine inogona chete kutora mhepo iyo haidike pasi pemvura. Kuisa mumwe mumidziyo inodiwa nesimba rayo yose, kunotora simba kubva kune vatengi kana kuita kuti mapumps aite basa rakakura, izvo zvinodhura zvakanyanya kupfuura zvaiita turbine. Kuita zvakanaka kwemvura mumidziyo yemvura zvinoda zvinhu zviviri: kumanikidza kwakanyanya, mvura ichifamba zvakanaka uye kushandiswa kwakachengeteka. Mumwe mugadziri wewebhusaiti yemushandisi aigona kuve nemapfekero e0.6 kusvika 2.4 m muhupamhi, kutenderera kwe0.9 kusvika 3.7 m / s uye zvishoma nezvishoma 5 psi (0.34 bar) zvekuwedzera tembiricha (Lucid Energy, yakachengetwa).

Capacity factor inosvika kubva kumugwagwa. Migwagwa inokwira uye inodzika nenguva dzegore, uye schema inofanira kuisa madziro akakwana munzira yekudyara zvekudya uye chero chinhu chimwe chete. Zvimwe zvivakwa zvemahombekombe zvinoda kuiswa mumigwagwa kuti zvikwanise kushandiswa nevanhu, uye mvura inobva mumasango inosvika kumahombekombe.Izvi zvinopa simba remagetsi re50 kW rinoshanda pa38% yesimba rayo, uye rinovhara pacharo kana paine nguva yekuora kwezuva kuitira kuti madziva arambe achifamba kuburikidza nenzvimbo yake yekufambisa nyama.

Mitemo: Theoretical uye Practical

Physics. Iyo simba iri chete seyakakura sezvinoitika nguva yekubuda. A garden stream ne 10 litres a second falling 5 m inotipa 0.3 kW, yakakwana kune mabhatiri uye chikafu asi kwete kupisa kwemumba. A typical madziva mukuru valve inopa mazana e kilowatts. Chii chinonzi megawatt? Chii chinonzi kilowatt? Chii chinonzi megawatt?

Fixed costs. A 20 kW scheme inodiwa zvakafanana ne500 kW scheme, kusanganisira zvidzidzo zvekunze, mvumo, kuchengetedzwa kwemvura, kubatanidza grid uye mabasa ezvemutemo. Izvi zvikwereti hazvina kudonha nehukuru, saka zvidiki zvirongwa zvinonyanya kubhadhara zvakanyanya pa kWh.

Environment. Weirs kubvisa zvekudya zvemahombekombe, uye turbines anogona kukuvadza zvekudya. Kunyangwe paine mugwagwa wekudyara, vatungamiriri vemunharaunda kuSettle vakazivisa kuti mvura yakakwira yaive nesvimbo uye kuti yainge isina kusimba (Settle Hydro). Mazhinji enyika haasi kukumbira yakazara ongororo yekunze kwezvirongwa zvidiki, izvo zvakakonzera kuipa kuiswa kwemamiriro ezvinhu mumigwagwa (Chidiki hydro). Mumwe mupiro wakachena unosiya madziro akakwana mumvura, unopawo mvura kune zvekudya zvinosvika kumahombekombe, uye unoongororwa.

Kuchengetedzwa kwemvura. Turbines mukati mezvivakwa zvemafuta ekumwa anobata madziro emafuta vanhu vanodya. Vanofanira kupihwa chitupa chekusangana nemvura yekunwa, havafaniri kubvumira mhepo kana zvinhu zvinokuvadza, uye vanofanirwa kukundikana zvakachengeteka, saka chigadzirwa hachizozviedza nemagetsi ayo.

Real michina, yakaenzana

_Projekti	Ku	Type and size	Chii chaive chakaongororwa kana kutaurwa
Settle Hydro	Ribble River, North Yorkshire, England	Archimedes screw pane muchina weir, 50 kW	Kugadzira kubvira November 2009; pamusoro 165 MWh gore (38% simba factor); £ 410,000 rakakura kuburikidza nenharaunda zvikwereti; vagadziri kuzivisa zvishoma salmon upstream uye kushamisika screw nyoro (Settle Hydro)
Torrs Hydro	Mhenderekedzo yeGoyt, New Mills, England	Archimedes screw, 2.4 m diameter, kusvika 63 kW	UK’s first community-owned hydro scheme, handed over in September 2008; £100,000 raised from 200 community members (Torrs Hydro)
LucidPipe, Portland Water Bureau	Portland, Oregon, United States	In-line turbines mukati meimwe yakakura gravity-fed water main	Yakaiswa mumigwagwa yemvura uye yakatangira kuburitsa muna 2015 (Oregon Department of Energy; Lucid Energy news, archived 2015).Tisina kuwana chero zvekare zvakaburitswa zvegore rayo rakaongororwa, uye muna 2022 webhurawuza rewebhu remugadziri raive richipihwa kutenga (archived page).
North Unit Irrigation District	Madras, Oregon, United States	Kugadzira simba remvura panzvimbo yekunwa (Natel Energy)	Mumwe wevanoshanda conduit zvirongwa zvakanyorwa neOregon Department of Energy (Oregon Department of Energy)
US conduit exemptions	United States yeAmerica	Mapepa uye kanali	236 conduit zvirongwa zvaive zvakabvumidzwa neFederal regulator muna 2013 (Conduit hydroelectricity)
Chirungu	China yekumaruwa	Maererano 45,000 zvidiki mishonga	Pamusoro pe 160 TWh gore negore muna 2010, zvakawanda zvezvo zvinopa simba remisha iyo yakanga isina grid (Small hydro)

Chidzidzo kubva kune izvi zvirongwa ndechekuti zvinoramba zvichishanda. Panzvimbo dzavapo mvura, kubuda kwemvura uye chivakwa chekufambisa, madiki emagetsi emaruva anoshanda kwemakore: michina yekugadzira magetsi kubva pakutanga kweindasitiri inogadzira magetsizve. Kana magetsi ari mashoma, huwandu hwemagetsi anogadzirwa hunogona kunge huri hwakawanda kana kuti hwakaderera. In-pipe hydro muzvinabhizimusi zvakasiyana yakanga ine enthusiastic mapepanhau uye zvishoma akaburitswa ongororo; physics ndiro zvakanaka, asi zvakanaka nzvimbo dziri zvakajeka uye misika yakagara chidiki.

Chii chinodhura

Musoro	Chii icho	Mutengo
Micro hydro, yakajairika inoiswa mutengo	$1,000 to $5,000 per kW (Micro hydro)
Isu ku kalkuleta kubva ipapo	40 kusvika 60% yesimba, 20 makore pa7% real, maintenance 3% yemari inobhadharwa gore rega (Fan Wall method)	$0.02 to $0.18 pa kWh
Settle Hydro, yedu kufungidzira	£ 410,000 ye 165 MWh gore, 20 kusvika 40 makore pa7% chaiyo, 3% kuchengetwa	pamusoro pe £0.26 kusvika pa£0.31 pa kWh
Isu tichienzanisa	Rooftop solar pane imba, Fan Wall model; Lazard 2026 yekutengesa uye yenharaunda solar	$0.19 per kWh; $0.09 to $0.20
Lazard (Kurume 2026)	New utility solar / onshore wind	$0.04 to $0.10 / $0.04 to $0.10 per kWh

Iyo yakakura kwazvo nekuti nzvimbo dziri. A zvakanaka high-chekuru peji neyakavakirwa intake anogona kuita magetsi kwemakore mashoma cents per kWh, zvakaoma pasi rooftop solar, uye kuenderera ichiita izvi kwemakore makumi manomwe. A chidiki low-head nharaunda scheme nepfupi zvekudya zvekudya, seSettle, mari yakawanda per kWh kupfuura rooftop solar patsika yedu zvinofungidzirwa; zvirongwa izvi zvinonzi zvakajairika kunyatso justified by refu upenyu, local ownership, output pazuva uye muzhizha, uye rutsigiro tarisiro. Panyaya yemvura inopinda mumidziyo, mibvunzo inowanzova nyore: pane kuwanda kwesimba riri kuparadzwa muvalve nhasi? Kana kuti kwete, hapana chinhu chaungaite kuti udzorere.

Photo: Anthony Harrison, CC BY-SA 2.0”)

Panogona kukunda, uye apo haigone

I can win:

• Inozivikanwa weir uye michina nzvimbo, apo Civil mabasa akabhadharwa kwezana kana maviri apfuura.
• Water utilities ne gravity mains, reservoir outlets uye pressure-reducing valves izvo zvinobvisa pressure nguva dzose pazuva.
• Kusvibisa ma canals nemvura yakachena, uye kubvisa mvura yakachena kubva kumatunhu.
• Off-grid mountain villages, uko micro-hydro minigrid inogona kupa simba zuva nezuva pamitengo yakaderera kupfuura diesel.
• Night uye winter power munzvimbo apo solar panels kuita zvishoma.

I can’t win:

• Munyika yakapfava ine madiki mabwe: pasina muviri kana kubuda hakuna simba.
• Mumidziyo inodiwa kumanikidza, apo turbine inofambisa chete bhajeti remagetsi kubva kune imwe mita kuenda kune imwe.
• Pane chivakwa chitsva chinokuvadza zvekudya mumvura inonyanya kukosha kwadzo, kana kuti kukuvadza kuri kukonzerwa nechigadzirwa ichi.
• Pa pico scale pa grid, apo mari isiri-yakamira inodzikira simba.

Chii chinoratidza, chinofungidzirwa uye chinofungidzira

Proven: the hydropower equation; turbine efficiency; that small hydro schemes run for decades with low running costs; that Archimedes screws and conventional turbines work on old weirs; that community ownership can finance small schemes; that conduit projects operate in water and irrigation systems.

Plausible: kuti akawanda madziro zviwanikwa vane zvakakwana surplus pressure pavalves uye reservoir outlets for useful kilowatts at each site; kuti standard pumps run seturbines anogona kuderedza mutengo wemu-pipe schemes; kuti nyowani fish-friendly designs inogona kudzikisa kunetsa panzvimbo dzakaderera-chikuru.

Speculative: in-pipe turbines mu ordinary distribution pipes pasina surplus pressure (iyo simba rinofanira kubva kune imwe nzvimbo); makuru enyika makontributions kubva kumicro hydro munyika dzine mashoma head; zvakachipa “plug-in” mhiripiri turbines pasina iyo yakasarudzika civil works uye mvumo.

Ongororo dzekutsvaga

• Kuongorora kuwanda kwemvura. Ndezvipi zvinhu zvinokuvadza simba remagetsi mumidziyo yemvura, nzvimbo nenzvimbo, uye ndezvipi zvikonzero zvekuti simba iri richiramba riripo zuva nezuva uye gore negore?
• Control. Turbines kuti kuchengetedza kumusoro-kubva pressure sezvizere sevalve vari kuchinja, kunyange sezvinodiwa zvichachinja.
• Fish. Ndeipi turbine dhizaini uye skrini inobvumira zvekudya kutenderera zvakasiyana neyakaderera kurwadziwa, yakaenzana, kwete yakavakirwa?
• Kubhadhara. Standardized zvidiki zvirongwa neshoma zvakagadzirirwa mabasa ezvematongerwo enyika, uye nyore mvumo yenzvimbo dzakabva weirs.
• Heat pamwe chete simba. Mvirini uye madziro emvura zvakare stable tembiricha zviwanikwa zveheat pumps; anogona imwe scheme kuita zvese?

Chii chine basa prototype aifanira

A small hydro idea imwecheteyo ndiyo inokurumidza kuongororwa, nekuti madziro, mapfekero nemadhora ndiwo zvinhu zvezuva nezuva. Mari idzi dziri pasi apa ndedzekufungidzira.

Nhamba	Kushanda	Chii chinoratidza	Ruvara	_Zvinyorwa
1. Bench rig	A pump loop kana header tank ine yakachena kutenderera (flow meter) uye pressure (gauge pamberi neshure), turbine ichifambisa load bank kuburikidza ne logged power meter	Kushanda zvakanaka pakumhanya uye kumusoro	$5k to $30k	1 kusvika 3 mwedzi
2. Real site yekuyedza	A 1 kusvika 20 kW unit pamvura, mugodhi wemumunda kana bypass yevalve yekushandisa, nekuchengetedza kwemhando yemvura uko kunoda, kuchera kwemwaka mumwe chete	Real output pamusoro kuchinja kubuda, debris, maintenance	$20k to $150k	6 kusvika 12 months
3. Utility kana chikwata chekuongorora	Kubvumidzwa kwekushandisa negrid connection, kuongorora zvekudya kana kuongororwa kwemvura yekunwa zvichienderana nezvinodiwa	Bankable yekutanga simba, mvumo, mari	$100k to $1 million	1 kusvika 2 makore

Stage 1 iri munzira yechikoro kana nzvimbo yekuvaka. Izviwo zvinopa chokwadi chakanaka chekuongorora: turbine, kutenderera kwakanyatsogadziriswa, kudonha kwakanyatsogadziriswa uye meteri inoratidza huwandu hwemagetsi hwayakagadzira.

Tinofanira kuita sei

• Hydraulic uye hydropower vagadziri yenzvimbo kuongorora uye turbine selection.
• Water utility engineers avo vanoziva kuti kupi kumanikidza kunoderera uye sei ma network anoita zuva nezuva.
• Fisheries biologists yefish passage design uye kuongorora.
• Electrical engineers yezvidiki magenerators, grid connection uye islanded minigrids.
• Civil engineers for intakes, weirs and screens.
• Masangano ekushandisa simba uye varimi vane mabwe, michina kana mapurasitiki ezvekudyara.
• Drinking-water certification specialists for anything inside a potable main.

Une pfungwa yakanaka?

Vamwe vatungamiri vesangano iri vanogona kunge vane vanhu vanoita kuti vazive zvauri kutaura. Kuti iite, pfungwa inofanira kunge iri inoshanda, yakajeka-yechokwadi-hupenyu mufananidzo wekuti inenge ichigadzira simba, nechigadzirwa chayo chakanyatsoongororwa pachinhu chisina kutaurwa: turbine pane imwe nzvimbo yekuyedza ine flow meter, pressure gauges uye logged power meter inokosha kupfuura chero drawing. Ipfungwa dzepapepa dziri kutarisirwawo: kana physics uye mazita ari nyore, tinogona kuzviburitsa pano pawebsite. Asi kusimudzira mari pasina kushanda model iri nyore, uye hapana pano ndiro mashoko emari, kudzoka kana kutsvagisa.

Kutumira yako chirongwa kuburikidza contribution form, kusarudza Green Initiative. Tiudzai kubuda uye guru inoita basa, efficiency wakamboongorora kana kutarisira, yakaoma mari pa kWh, uye cheapest bvunzo kuti inogona kuratidza zvakaipa. Energy sources page inoenzanisa magetsi emahombekombe nevamwe vaviri.

Zvinyorwa

1. Hydroelectricity, Wikipedia: chikamu chemagetsi epasi rose uye efficiency yeturbine.
2. Small hydro, Wikipedia, ichitora kubva kuUNIDO’s World Small Hydropower Development Report 2022.
3. Micro hydro, Wikipedia: marudzi emhando, efficiencies uye akaiswa mari.
4. Conduit hydroelectricity, Wikipedia.
5. Hydropower Regulatory Efficiency Act of 2013, Wikipedia; text at congress.gov.
6. Settle Hydro and Torrs Hydro, Wikipedia.
7. Oregon Department of Energy. Hydropower muOregon, kusanganisira mapurojekiti ekunze muPortland uye paNorth Unit Irrigation District.
8. Lucid Energy. Target projects (archived 2021) and lucidenergy.com (archived 2022).
9. Run-of-the-river hydroelectricity, Wikipedia: mwedzi nemhedzisiro yekunze.
10. Ofgem (2023). Tipical domestic consumption values: 2,700 kWh yemagetsi gore rega rega kune mumwe munhu anodarika makore makumi maviri nemana.
11. Lazard (June 2026). Levelized Cost of Energy+, vhezheni 19.
12. Local Solar System Foundation. The Fan Wall: open model and benchmark, rooftop solar at $0.19 per kWh.
13. Turbine yemvura, Wikipedia: yakajairika huwandu hwemaoko emhando dzese dzeturbine, kubva kumabvi (0.2 kusvika 4 m) kusvika kuPelton mabhatiri (80 kusvika 1,600 m).