
baadal bindu

taral padarthon mein, baadal bindu vaha tapman haye jisake neeche ack pardarshi ghol yaa tou ack taral-taral charan prithakkaran seey gujarta haye taaki ack payas yaa ack taral-thhos charan sankraman bunn sakey yaa tou ack sthir draav yaa ack nilamban joe ack avakshep koo sthir kartaa haye. baadal bindu 'oss bindu' key samaan haye jiss parr ack gais-taral charan sankraman jise sanghanan kahaa jaataa haye, jall vaashp (aardr havaa) mein taral paani (oss yaa baadal) banaane key liye hotaa haye. jaba tapman 0°see seey neeche hotaa haye, tou oss bindu koo frost bindu kahaa jaataa haye, kyonki jall vaashp gais-thhos charan sankraman seey gujarta haye jise nikshepan, ghanikaran yaa jamana kahaa jaataa haye. 
petroleum udyog mein, baadal bindu usa tapman koo sandarbhit kartaa haye jisake neeche deejal mein paraphine mome yaa biodiesel mein biovax ack baadal jaisa roop banaata haye. thhos momon kii upasthiti tail koo motaa curr detee haye aur injanon mein eendhan filter aur injector koo bund curr detee haye. mome thhandi satahon parr bhee jamaa hotaa haye (udaaharan key liye, pipeline yaa heat exchanger fouling kaa utpaadan) aur paani key saath ack payas yaa soul banaata haye. isaliye, baadal bindu thhande sanchaalan tapman parr tail key filter yaa chhote chhidron koo jodane kii pravritti koo ingit kartaa haye.
baadal bindu kaa ack dainik udaaharan thhand key mausam mein sangraheet jaitoon key tail mein dekhaa jaa sakata haye. olive oyal lagbhag 4 degree celsius parr (taral-thhos charan prithakkaran key madhyam seey) thhos honah shuru hoe jaataa haye, jabaki samshitoshna deshon mein sardiyon kaa tapman aksar 0 degree celsius seey thandaa hoe sakata haye. inn sthitiyon mein, jaitoon kaa tail safed, mome key guchhe/thhos tail key gole vikasit karna shuru curr detaa haye joe paatr key neeche taka doob jaataa haye.
kachche yaa bhaari telon mein, baadal bindu mome key roop mein dikhane vaale tapman (vaat) aur mome kii varsha key tapman (doubleu. pee. tii.) kaa paryaay haye.
ack gair-ionic surfactant yaa glycol ghol kaa baadal bindu vaha tapman haye jiss parr mishran charan-alag honey lagata haye, aur dou charan dikhaai dete hain, iss prakaar baadal bunn jaate hain. yeh vyavhaar polyoxyethylene shrinkhalaon vaale gair-ionic surfactants kii visheshta haye, joe paani mein tapman key vipareet ghulansheelata banaam vyavhaar pradarshit karate hain aur isaliye tapman badhane parr kissy bindu parr "baadal" nickle jaataa haye. iss vyavhaar koo pradarshit karane vaale glycoles koo "cloud-point glycoles" key roop mein jaanaa jaataa haye aur inca upayog shale avrodhakon key roop mein kiya jaataa haye. baadal bindu lavanata seey prabhaavit hotaa haye, joe aam taur parr adhik khaare taral padarthon mein cumm hotaa haye.
petroleum utpaadon key baadal bindu koo maapana.
manual vidhi.
pareekshan tail koo 40 mimi motai (astm dee2500 key anusaar) kii paraton mein pardarshi honah aavashyak haye. mome key chrystal aamtaur parr sabse pahale nichali paridhi vaali deewaar parr ack safed yaa doodhiya baadal key roop mein banate hain. baadal bindu vaha tapman haye jahan yeye chrystal pahali baar dikhaai dete hain. 
pareekshan kaa namuna pahale ack pareekshan jaar mein lagbhag aadhe bharey star taka daala jaataa haye. pareekshan thermometer leey jaane vaale cork kaa upayog jaar koo bund karane key liye kiya jaataa haye. thermometer bulb koo jaar key neeche aaraam karane key liye rakhaa jaataa haye. isake baad poore pareekshan vishay koo atyadhik sheetlan koo rokane key liye ack gasket key oopar ack nirantar tapman sheetlan snan mein rakhaa jaataa haye.
pratyek 1 degree celsius parr, namuna nikala jaataa haye aur baadlon key liye nireekshan kiya jaataa haye aur phir jaldi seey badal diyaa jaataa haye. baadlon key bindu key aadhar parr kramik roop seey cumm tapman vaale sheetlan snan kaa upayog kiya jaa sakata haye. iss pareekshan key liye cumm tapman vaale sheetlan snan mein tapman sthirata 1.5k seey cumm naheen honey chaahiye.
swachaalit vidhi.
astm dee 5773, petroleum utpaadon key cloud point (nirantar sheetlan darr vidhi) kii maanak pareekshan vidhi, manual pareekshan prakriya kaa ack vikalp haye. yeh swachaalit upkaran kaa upayog kartaa haye aur pareekshan vidhi dee2500 key barabar paaya gayaa haye.
dee 5773 pareekshan vidhi manual vidhi dee2500 kii tulanaa mein cumm samay mein cloud bindu nirdhaarit karati haye. iss swachaalit vidhi kaa upayog karke pareekshan chalaane key liye cumm prachaalak samay kii aavashyakta hoti haye. isake alawa, kissy baahari sheetlak snan yaa prasheetan ikai kii aavashyakta naheen haye. dee 5773-60 degree celsius seey + 49 degree celsius key tapman seema key bheetar baadal bindu nirdhaarit karane mein saksham haye. parinam 0.1 degree celsius key tapman sankalp key saath report kiye jaate hain.
astm dee 5773 key tahat, pareekshan namoone koo ack peltier upkaran dwara 1.5 +/- 0.1 degree celsius/minut kii sthir darr seey thandaa kiya jaataa haye. iss avadhi key dauran, namoone koo ack prakaash srot dwara lagaatar prakaashit kiya jaataa haye. optical detectors kii ack shrinkhala mome key chrystal key baadal kii pahali upasthiti key liye namoone kii lagaatar nigrani karati haye. jiss tapman parr mome key chrystal kii pahali upasthiti kaa pataa lagaaya jaataa haye, vaha baadal bindu nirdhaarit kiya jaataa haye.

