A cikin zaɓin farashin ruwa, idan zaɓi ba shi da kyau, farashin yana iya zama babba ko ainihin aikin famfo na iya biyan bukatun shafin. Yanzu ba da misali don bayyana wasu ka'idodin da ruwa ke buƙatar bi.
Zabi na tsotsa sau biyu yakamata ya kula da wadannan maki:
1. Sauri:
Raunin al'ada an ƙaddara bisa ga buƙatun abokin ciniki. A kasan saurin wannan famfo iri ɗaya, adadin da ya dace da kuma ɗaga zai ragu. Lokacin zabar ƙirar, ya zama dole don ba kawai aikin tattalin arziƙin ba ne kawai, har ma da yanayin shafin, kamar: abubuwan da ke haifar da kai, da sauransu.
2. Dogara NPS:
Ana iya ƙaddara NPS bisa ga darajar da abokin ciniki da abokin ciniki, ko bisa ga yanayin interl na famfo,
Lissafin kai tsaye na famfo na ruwa (algorithm mai sauƙi: bisa ga daidaitaccen matsin lamba na atmospheria kuma ruwan zafin jiki) shine kamar haka:
Daga gare su: Darajar ingantacciyar hanyar tsayin tsayin tsinkaye ne, ƙimar mara kyau ita ce kwarara ta baya);
-Ammatuwar matsin lamba a kai a wurin shigarwa (wanda aka lissafta shi kamar 10.33m a ƙarƙashin matsanancin matsakaiciyar matsakaiciyar matsakaiciya da ruwa mai bayyanawa);
hc-hazar hydraulic asarar; (Idan bututun masetlline ne gajere kuma wanda ba a haɗa shi ba, yawanci ana lissafta azaman 0.5m)
-Vapipaporation kai; (share ruwa a dakin zafin jiki ana lissafta azaman 0.24m)
- mai izini Npsh; (Don tabbatar da aminci, lissafta gwargwadon NPSHR × 1.2, NPSHR ga kundin adireshi)
Misali, NPS NPSHR = 4M: To: HG = 10.33-0 254m, matakin na ruwa yana iya zama mai kyau, da kuma darajar baya yana zuba ya zama mafi girma fiye da yadda Darajar da aka lissafta, wato, matakin na ruwa na iya zama sama da darajar ƙididdigar sama da layin cibiyar mai impeller).
An lissafta abubuwan da ke sama a ƙarƙashin yanayin yanayin zafin jiki na al'ada, bayyanuwa bayyananne da kuma yanayi na yau da kullun. Idan zazzabi, yayi yawa da dabi'a na matsakaici ne, don kauce wa aikin computation na famfo, ya kamata a zaɓa cikin tsari na yau da kullun. Daga cikin su, zazzabi da yawa na matsakaici ana lissafta gwargwadon ƙimar da suka dace a cikin yanayin zafi daban-daban na biranen ƙasar ". Wani izini na Npsh shine tabbatar da aminci, a cewar NPSHR × 1.4 (wannan darajar aƙalla 1.4).
3. Lokacin da Interl matsa matsin lamba na al'ada shine ≤0pa, lokacin da Motar Interet + Times ≤ sau 50 ≤ the matsa lamba na al'ada;
Inetet matsa lamba + kai × 1.5 sau> matsin lamba, daidaitattun kayan da ke haɗuwa da bukatun ya kamata a yi amfani da su; Idan matsi na Inet ɗin ya yi yawa ko matsin lamba na gwaji ya yi yawa, da sauransu. waɗanda ba su cika kayan aikin ba don ƙara yawan ƙarfi da kuma ƙara yawan ƙwararrun bango;
4. M7NANTA MANAR SUKE MELOCELINCELILI NA FARKO NA IYALI NE: M7N, M37G-G92 SLEDIN PUPLID, WANE DA AKE YI AMFANI DA AKELIDE / GWAMNATI); Lokacin da matattarar matatun ƙarfe shine ≥0.8mpsa, dole ne a zaɓi hatimin alfarwa ta hanyar.
5. An ba da shawarar cewa matsakaici na matsakaici-tsana biyu bai wuce 120 ° C. A lokacin da 100 ° C ≤ zazzabi ≤ 120 ° C, famfo da hatimin dole ne a sanye shi da ruwan sanyi a waje da sandar sanyaya a waje da sanyaya sanyaya; Duk o-zobba na famfo an sanya su da amfani duka: Fluteine roba (gami da hatimin injin).
Lokaci: Mayu-10-2023