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АРЕНДА ЭКСКАВАТОРА С ПРОФЕССИОНАЛЬНЫМ ОПЕРАТОРОМ
ДЕМОНТАЖ ЗДАНИЙ, СООРУЖЕНИЙ С ВЫВОЗОМ И УТИЛИЗАЦИЕЙ ОТХОДОВ
ВАЛКА ДЕРЕВЬЕВ, КОРЧЕВАНИЕ ПНЕЙ
ЗЕМЛЕРОЙНЫЕ РАБОТ КОПКА ТРАНШЕЙ, ЯМ, ЗАСЫПКА КОТЛОВАНОВ, РЫХЛЕНИЕ ГРУНТА
РЕМОНТ И ОБСЛУЖИВАНИЕ ЛЮБОЙ СПЕЦТЕХНИКИ
РАБОТАЕМ ПО ДОГОВОРУ
СОБЛЮДЕНИЕ СРОКОВ ВЫПОЛНЕНИЯ РАБОТ
ГИБКАЯ ЦЕНОВАЯ ПОЛИТИКА И ИНДИВИДУАЛЬНЫЙ ПОДХОД К КАЖДОМУ КЛИЕНТУ
Fresh Water Generator = Βραστήρας ή Βαπορέτα
Πηγή Εικόνας: Alfa Laval Type JWP-26-C Series
Fresh Water Generator
Ο Fresh Water Generator γράφεται σύντομα ως F.W.G. και αποδίδεται στα ελληνικά ως παραγωγός γλυκού νερού, αλλά έχει επικρατήσει να ονομάζεται ως βαπορέτα ή βραστήρας ή Αποστακτήρας.
Με το βραστήρα παράγουμε αποσταγμένο νερό από θαλασσινό νερό.
Η διαδικασία της μετατροπής πραγματοποιείται με δυο εναλλακτήρες θερμότητας.
Ο ένας καλείται εξατμιστήρας (Evaporator) ή βραστήρας και μέσα σ' αυτόν το νερό θερμαίνεται, βράζει και εξατμίζεται.
Ο άλλος καλείται συμπυκνωτής (condenser) ή ψυγείο και μέσα σ’ αυτόν ο παραγόμενος ατμός ψύχεται με θαλασσινό νερό και συμπυκνώνεται σε αποσταγμένο νερό.
Αρχή Λειτουργίας
Ο βραστήρας (FWG) τη θερμότητα για την εξάτμιση του θαλασσινού νερού την λαμβάνει από το νερό ψύξεως (jacket) της κυρίας μηχανής.
Μέρος του νερού ψύξεως της μηχανής, που κανονικά έχει θερμοκρασία 60oC-65oC στην εξαγωγή από την κινητήρια μηχανή, οδηγείται στον εναλλακτήρα θερμότητας του βραστήρα. Εκεί κυκλοφορεί και αποδίδει θερμότητα στο θαλασσινό νερό.
Το θαλασσινό αυτό νερό εξατμίζεται, μια και το σημείο βρασμού του είναι περίπου στους 38οC λόγω του κενού που δημιουργείται στο βραστήρα από τον εκχυτήρα (περίπου 93%) (τσιφάρι ή ejector). Ο παραγόμενος ατμός στον εναλλακτήρα θερμότητας διέρχεται μέσω του διαχωριστήρα (demister) και οδηγείται προς το ψυγείο (συμπυκνωτή), όπου ψύχεται από το θαλασσινό νερό, που κυκλοφορεί δια μέσου των αυλών του ψυγείου εσωτερικά.
Ο εκχυτήρας δημιουργεί κενό στο βραστήρα (περίπου 93% ) και σ’ αυτό οφείλεται η χαμηλή θερμοκρασία εξατμίσεως (περίπου 38οC) του θαλασσινού νερού.
Η αντλία του εκχυτήρα (ejector pump) είναι κοινή κεντρόφυγη αντλία, που στέλνει θαλασσινό νερό προς τον εκχυτήρα.
Η αντλία αναρροφήσεως συμπυκνώματος (Fresh Water Pump) αναρροφά το παραγόμενο γλυκό
νερό από το ψυγείο του βραστήρα και το καταθλίβει στις δεξαμενές γλυκού νερού του πλοίου.
Χρήσιμες Επεξηγήσεις
Ejector Pump = Αντλία εκχυτήρα ή τζιφαριού
A pump that feeds driving water to the Water Ejector of the Fresh Water Generator.
Μια αντλία που τροφοδοτεί το τζιφάρι του βραστήρα.
Feed Water = Τροφοδοτικό νερό
Seawater that is a source of distillate.
Το θαλασσινό νερό είναι η πηγή της απόσταξης
Deflector = ανακλαστήρας
A plate that separates seawater particles being transported together with the vapor generated in the Evaporator.
Μία πλάκα που διαχωρίζει τα θαλάσσια σωματίδια που μεταφέρονται μαζί με τον παραγόμενο ατμό στον βραστήρα.
Evaporator = Εξατμιστήρας
Being composed of the Evaporation Chamber, Deflector and Mesh Separator, the Evaporator evaporates seawater.
Ο εξατμιστήρας παράγει θαλασσινό νερό, το οποίο διέρχεται μέσα στο θάλαμο εξάτμισης, τον ανακλαστήρα και τον διαχωριστήρα.
Distillate (Product Water) = Απόσταγμα
Water generated by condensation of vapor generated in the Evaporator.
Το νερό παράγεται από τη συμπύκνωση του ατμού που παράγεται από τον εξατμιστήρα.
Distillate Pump = Αντλία αποστάγματος (νερού)
A pump that transfers the distillate produced in the Fresh Water Generator to the Fresh Water Tank.
Μία αντλία που μεταφέρει το αποσταγμένο νερό από τον βραστήρα στην δεξαμενή γλυκού νερού.
Fresh Water Generator = Βραστήρας
A unit that produces distillate from fresh water or seawater.
Μία μονάδα που παράγει αποσταγμένο νερό από γλυκό η θαλασσινό νερό.
Water Ejector = Τζιάρι νερού
A device that evacuates the Evaporator and discharges cooling seawater and brine overboard.
Μία συσκευή η οποία δημιουργεί κενό στον βραστήρα και καταθλύβει το ψυχόμενο νερό και την άλμη έξω από το πλοίο.
Condenser = Συμπυκνωτής
A heat exchanger that condenses vapor into distillate.
Ένας εναλλάκτης θερμότητας που συμπυκνώνει των ατμό σε απόσταγμα.
Alfa Laval Type - JWP-26-C Series
Procedure for Starting
1. Open valves on the suction and discharge side of the ejector pump.
2. Open overboard valve for ejector.
3. Close air valve on the upper part of the separator vessel.
4. Start ejector pump to create a vacuum of min. 90%.
Pressure at ejector inlet minimum 350 kPa (3.5 kp/cm2).
Back pressure at ejector outlet maximum 60 kPa (0.6 kp/cm2).
5. When there is a minimum of 90% vacuum, open very slowly hot water inlet and outlet valves from jacket cooling system.
6. Start hot water supply to evaporator section by adjusting by-pass valve, until the desired jacket water temperature is reached inlet 75oC outlet 60oC
The boiling temperature inside the separator vessel ought to be about 40oC.
ATTENTION
Improper hot water flow / adjust by – pass / will cause the following effects:
In case the flow is too low – low boiling temperature, drop the fresh water production / High brine level in sight glass in separator vessel.
In case the flow is too big – high boiling water temperature, drop of fresh water production, increase of salinity and drop of vacuum/ low brine level in sight glass is separator vessel.
7. Switch on Salinometer.
8. Start Fresh Water Pump.
ATTENTION
During the first few minutes, after fresh water pumo starts, salinity of produces water may be higher than 2 ppm, this it is recommended to dump it to bilge / open valve on the discharge side of fresh water pump. When evaporation starts, the boiling temperature rises, while the obtained vacuum drops to aprox. 90%. After few minutes normal vacuum and boiling temperature is re established.
Procedure for Stopping
1. Fully open by pass valve.
2. Close the inlet and outlet valve of jacket.
3. Stop fresh water pump.
4. Switch off salinometer
5. Wait to decrease the temperature.
6. Stop the ejector pump.
7. Open the air valve.
8. Close the valves in the suction and discharge side of the ejector pump.
9. Close overboard valve for ejector.
Βιβλία:
Βοηθητικά Μηχανήματα Πλοίων, Δανιήλ Γ. & Μιμηκόπουλου Κ., Ίδρυμα Ευγενίδου
Δεσμός: https://www.eugenfound.edu.gr/appdata/documents/books_pdf/e_j00048.pdf
Χρήσιμοι δεσμοί:
Βίντεο: How Fresh Water is Generated from Sea Water on Ships?
Παρουσίαση
https://wlxt.whut.edu.cn/new/zlgc/ljgcsy/data/uploadfile/20120219201257245.swf
Instruction Manual Alfa Laval JWP-26-C80
https://www.doc88.com/p-898241311525.html
Simulator:
Alfa Laval
https://www.alfalaval.com/industries/marine/desalination/Pages/desalination.aspx
Ilseung
Atlas Sasakura
https://www.sasakura.co.jp/e/products/index.html
Επιμέλεια Μενής Ιωάννης
Θέμα: Fresh Water Generator
услуги по аренде и эксплуатации гусеничного экскаватора
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Cool, I've been looking for this one for a long time
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Since 1997, Flirt.com has worked with 70 million users, claiming to take them places where their wingmen or own finesse has failed. By helping you find common interests with potential dates and flings, the site gives you the building blocks to get talking, because as they say, “It all starts with flirting.” Their simple name entices you with visions of ready and cute singles eager to get to know you intimately right in your own town. But does this site really help you with your game, or is it all talk and no action?
First Glance
When you first sign up, you’re invited to choose which of two genders you’re attracted to. There’s no trans* option, couples option, or bisexual option, so from the get-go you’re boxed in for what looks like a largely hetero and vanilla hookup site. Whatever you choose, make sure you pick the right one when you sign up, because once you’re a member, there’s no changing who you’re attracted to, leaving bi babes in the dust.
After registering, creating your profile is straightforward and user-friendly. You can put as much (or as little) detail into this section as you’d like, and pick any picture you think will draw those honeys in. As soon as you finish your profile, you’re pinged by a message from the site admin with lots of “special offers” to keep you hooked. From there, you’re all signed up and ready to start meeting the eligible bachelors and bachelorettes in your city.
The Dating Pool
From the home screen, Flirt.com promises a wealth of single people right for you. You can filter them by popularity and recent activity. However, you’ll quickly realize that only the first forty-five people or so are available for free, making it a little hard to judge the types of people this site draws in.
If you’re looking for men, though, the first few rows of eligible bachelors makes one thing is clear: you’d better like men who frown. Out of the available matches in the Bay Area, only two had something close to a smile in their profile picture. Most photos were grainy, and there wasn’t much to go on that suggested the matches there would be fun to spend time with.
Maybe the straight men look so down in the dumps because the available women, although more friendly and bubbly-looking, all come with a huge asterisk. The majority of profiles looked fake. As soon as I signed up, women messaged me saying I was “interesting” even though my profile and photo gallery were entirely blank. Most of the women were bots at best, or swindlers at worst, and it was hard to know if there were any real and eligible local women looking to meet.
Unique Perks
In spite of these red flags, Flirt.com does have a few things that make it different from other browser-based dating and hookup sites. You can do the popular Tinder-style swiping from your desktop, so you can browse without having to read their whole profile (or pay for it).
You are allowed to send five free messages daily, and participate in chatrooms like “Naughty but Nice” and “Kink Friendly,” so you can connect to more scintillating content with (potentially) real people in your area.
On top of it all, you can send FlirtCasts. These public messages are sent to multiple active users in the area at once, testing the waters to see who’s interested in a date.
The catch
Frankly, everything about Flirt.com screams “scam.” For offering features that virtually every other dating website offers – and not with any grand improvements – Flirt.com is a money drain that seems to target men over 35 who may be less than tech-savvy.
This website reads like a bad and expensive version of Tinder, and the problems don’t end there. Many men have reported being scammed after signing up. They receive dozens of messages from women, but can’t access them all unless they pay. Once handing their credit card information over to Flirt.com, the river of messages dries up. That’s because most of the messages are from bots, there to stress new users out until they buy credits, and the site then deletes unseen messages after twenty-four hours, giving users little time to consider whether they actually want to pay for the site at all.
And remember that site admin who messages you at the beginning? Well, it keeps coming, promising a “special discount” for access to features – which, if you’d like to use this site, you really need. Only a user’s initial photo, tagline, and name are visible for free. Their bio, interests, and other information all require a membership. The special discount they offer is 30% off of their special prices, but once that discount ends, you’ll be paying...
$1.50/day (or $4.50) for a Three Day Trial
$2.14/day (or ~$64.20) for one month
$0.77/day (or ~$69.30) for three months
$0.62/day (or ~$111.60) for six months
And if you’re still thinking a three-day trial looks harmless, think again. The fine print reads that your three day trial “automatically converts” into a monthly membership, meaning that your $4.50 has just become a recurring $64 a month. To make things worse, Flirt.com makes it very difficult for you to navigate cancellation. Many men report having to go as far as blocking Flirt.com from their cards in order to stop the payments.
Conclusion
User beware! Flirt.com is one site you should stay very far away from. Although it may have started out as a legit dating and hookup site in the ‘90s, it’s devolved into a scam to steal money from men looking for lovin’. There are much better places to find a date, and you don’t need to drain your wallet to get there. I'm giving Flirt.com 1/5 stars.