Energetik81 je napisal/-a:... Namreč izkoristek primarnega goriva v TE je na pragu elektrarne baje dobrih 30%. ...
lp
Izkoristek primarnega goriva v sodobni TE je precej večji - npr v bodoči el. v Šoštanju, ki bo uporabljala lignit

Energetik81 je napisal/-a:... Namreč izkoristek primarnega goriva v TE je na pragu elektrarne baje dobrih 30%. ...
lp
esem je napisal/-a:Energetik81 je napisal/-a:... Namreč izkoristek primarnega goriva v TE je na pragu elektrarne baje dobrih 30%. ...
lp
Izkoristek primarnega goriva v sodobni TE je precej večji - npr v bodoči el. v Šoštanju, ki bo uporabljala lignit(je sicer kogenerativnega tipa, kar pomeni, da deluje na plin in lignit, a plina dodajajo manj in služi predvsem boljšemu in čistejšemu izgorevanju lignita), je 44%. Lahko si misliš, kolikšen izkoristek je šele na rjavi ter črni premog ali na nafto, plin. Poleg tega so TE lahko precej bolj učinkovite glede prečiščevanja, filtriranja, trdih delcev....
imilet1 je napisal/-a:fantje jedilno olje v lidlu je zakon!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Energetik81 je napisal/-a: @drugmirko: jst se pa to učil pred 3 leti![]()
Sej si še kr povedu, ampak par stvari si mal falil. Ustavitev in zagon TEŠ ne traja teden ampak nekaj ur. Problem je pa ta, da zagon ogromno stane, veliko več kot obratovanje na MIN moči. Zato se kljub neugodno nizkim cenam elektrike ponoči splača obratovat na MIN, preveč elektrike pa prodat npr. Italijanom![]()
Poleg tega se za pokrivanje vršne energije ne vklaplja dizlov, ker so fejst predragi kljub takrat visoki ceni elektrike, poleg tega pa jih praktično ni. Baje še plinske Brestanice ne zaganjajo, ker je plin drag, Brestanica je mišljena v glavnem za kritično napajanje NEK. Torej pokrivajo konice v glavnem HE, trapez pa HE in TE.
Ampak zdj smo pa mal že s teme pršli s temi elektrarnami.ops:
RENO911 je napisal/-a:Ne razumem tega perpetuum mobile-a. Ali pa recimo magneti. Magnet je neka energija, ki pač je, iz ničesa. Zakaj ni mogoče s pomočjo magnetov ustvarit perpetuum mobila?
drugmirko, super ilustracija glede infrastrukture. To sem hotel zadnjič povedati kot odgovor na tezo o "zaroti naftnih mogotcev" - 100 let se je vlagalo v infrastrukturo, ampak sedaj je pa že vsa tukaj in večinoma že odplačana, nova vlaganja so potrebna le zaradi postopne rasti kapacitet in vzdrževanja. In že zato gredo na svtu vsako leto milijoni/milijarde dolarjev. Tudi ta denar pa je pravi drobiž v primerjavi s tem, če bi morali vse to še enkrat na novo postaviti "iz nule".drugmirko je napisal/-a:.. kolko pa mislite da je stala vsa infrastruktura naftne industrije.... vsi naftovodi, tankerji, pristanišča, bencinske pumpe, rafinerije in ves ostali šmoren, v katerega se vlaga že zadnjih 100 let? sej to tudi ni blo zastojn! pa nisem nobenga slišal jmrat kak je to drago glede na končnih kolko...15-20% iskoristka energije nafte v avtu?? če bi se tak keš vložu razvoj in proizvodnjo sončnih celic bi kilovat celic tudi najbrž stal en evro....
Mate je napisal/-a: Nisem ljubitelj teorije zarot, samo v tem primeru so dejstva preveč očitna, pohlep pa prevelik ne glede na jasne posledice kurjenja fosilnih goriv.
Mate je napisal/-a:Sem pa še malo računal, tako na uč. 55 km dnevno pomeni nekje 9 kWh ur električne energije, kar na letni ravni pomeni 3300 kWh. V slovenskih sončnih razmerah 1 kW inštalirane moči sončnih celic v enem letu prinese 1000 kWh električne energije. Cena sončnih celic in periferije se zaenkrat giblje okrog 6000 €/kW. Potrebujemo 3,3 kW, kar stane 20 tisoč €. Za teh 20 tisoč € pa se lahko "zastonj" vozimo najmanj nadaljnjih 30 let. Strošek za nafto v 30 letih bi znašal: 55 km/dan * 365 dni/leto * 30 let * 6 l/100km * 1 €/l = 36.000 €.
AlgaeLink launches 2nd generation biofuel equipment at Biodiesel-Expo
21st September 2007
AlgaeLink, a subsidiary of the Dutch firm Bioking, will unveil its photo-bioreactors for algae-for-biodiesel production at the UK Biodiesel-Expo and Biofuels Conference, giving the UK its first demonstration of a second-generation biofuel that the conference organizer says “is already getting the bosses at Boeing excited”.
Event organizer Biofuels Media says commercial algae farming is coming to the rescue of the increasingly controversial biodiesel. Unlike crops such as soy, palm, corn and rapeseed, many strains of micro-algae contain as much as 70% oil - up to 25 times more than oil seed rape.
With increasing interest in biodiesel as an alternative to fossil fuel, many have looked at the possibility of growing more oilseed crops as a solution to the problem of peak oil, but have raised concerns over the displacement of food crops, impact on biodiversity, and rising feedstock prices.
Algae is also capable of absorbing nitrogen from wastewater and extracting carbon dioxide from the atmosphere. Algae can be grown in open ponds or sealed in clear tubes to produce far more oil per acre than food crops such as soybeans.
Other advantages claimed for micro-algae as a fuel feed crop include:
- All year cultivation and short life cycle
- The fastest growing plant on earth - 100 times faster than trees – algae typically double their weight daily
- Algae requires only raw materials that are abundant: sunlight, water, carbon dioxide and nutrients
- Algae can grow in adverse conditions for other crops such deserts and saline waters
The Biodiesel-Expo and Biofuels Conference has attracted 100 exhibitors from both the UK and overseas.
(www.biofuelsmedia.com)
algal systems could produce between 2000-20,000 gallons of biodiesel-worthy vegetable oil per acre (an acre of soy yields 40-60 gallons), algae stands as the great green hope of the appropriate biofuels revolution.
Recent announcements from Diversified Energy + XL Renewables and Originoil push algal oil further into the ever-diversifying biofuels toolkit. It is my hope that these pioneering technologies will be integrated and improved upon by the likes of Solix, Greenfuel Technologies Corp, Solazyme, Live Fuels and all of the other algae entrepreneurs in the cleantech space.
First, Diversified / XL’s Simgae announcement:
According to the companies, the new technology, called Simgae™, uses common agriculture and irrigation components to produce algae at a reduced cost. The system uses unique thin walled polyethylene tubing, called Algae Biotape®, similar to conventional drip irrigation tubes.
The patent pending biotape is laid out in parallel across a field. Under pressure, water containing the necessary nutrients and a small fraction of algae are slowly introduced into the biotape. Carbon dioxide is injected periodically and after roughly 24 hours the flow leaves the Algae Biotape with a markedly greater concentration of algae than was started.
All the supporting hardware components and processes involved in Simgae are direct applications from the agriculture industry. Re-use of these practices avoids the need for expensive and complex hardware and costly installation and maintenance.
The design is expected to provide an annual algae yield of 100 - 200 dry tons per acre. Capital costs are expected to be approximately $45k - $60k and profitable oil production costs are estimated at only $0.08 - $0.12/pound. These oil costs compare to recent market prices of feedstock oils anywhere from $0.25 - $0.44/pound.
An agricultural conference in Hungary yesterday heard from Szent Istvan University professor Marta Birkas that the effects of a drought which halved the country’s maize crop this year had been exacerbated by soil evaporation accelerated by the removal of stalks and straw from the harvested land for use as biomass in power generation. (Planet Ark, 21 September)
esem je napisal/-a:Če malo pogledam te številke, se zdi, da bodo hibridi na biogoriva iz alg solidna možnost za nekaj časa. Vsekakor so zmogljivejše fotovoltaične celice, fuzija in el. avti edina prava prihodnost, a do takrat (do masovne in poceni tehnologije) bo morda preteklo še precej vode. Bomo videli.
Po forumu brska: 0 registriranih uporabnikov in 4 gostov