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What is Charge Air Cooler purpose ?<\/strong> Cooler maintenance for optimum efficiency<\/strong> Purpose of division plate<\/strong> What do you know L.O cooler leakage ? How to do L.O cooler leakage occur ?<\/strong> How do you know air cooler leakage ?<\/strong> How to check cooler efficiency ?<\/strong> Purpose of baffle plate<\/strong> Cause of loss of vacuum effect in F.W.G<\/strong> What will happen while vacuum reach 100%<\/strong> Why F.W.G is fitted onboard ship ?<\/strong> Treatments for drinking purposes.<\/strong><\/p>\n Sterilizing methods.<\/strong> Osmosis.<\/strong> Reverse osmosis.<\/strong> Membranes<\/strong> What is Charge Air Cooler purpose ? \udbc0\udc09 To reduce air temperature & increase density of charge air. \udbc0\udc09 All more fuel can be burnt more power can be obtain \udbc0\udc09 Reduce exhaust temperature and engine thermal load. \udbc0\udc09 Increase scavenging efficiency, safe working temperature. Cooler maintenance for optimum efficiency 1. Cooler should be checked […]<\/p>\n","protected":false},"author":1,"featured_media":5764,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-5892","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-marine-engineering-competency-exams-study-blogs"],"_links":{"self":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/comments?post=5892"}],"version-history":[{"count":1,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5892\/revisions"}],"predecessor-version":[{"id":5893,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5892\/revisions\/5893"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/media\/5764"}],"wp:attachment":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/media?parent=5892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/categories?post=5892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/tags?post=5892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\udbc0\udc09 To reduce air temperature & increase density of charge air.
\n\udbc0\udc09 All more fuel can be burnt more power can be obtain
\n\udbc0\udc09 Reduce exhaust temperature and engine thermal load.
\n\udbc0\udc09 Increase scavenging efficiency, safe working temperature.<\/p>\n
\n1. Cooler should be checked any deposit of line, scale or oil sludge may be present in cooler it should be cleaned.
\n2. Cooler of water side can be done with soft tube brush and oil side with carbon tetra chloride solution in reverse direction to normal flow with hand pump for about 4 hours.
\n3. After cleaning the cooler are hydraulically pressure tested normally 1.5 times the working pressure.
\n4. It 10% of the tubes have been leaked retubing in necessary. Normal leaking tubes may be stopped by plugging.
\n5. Corrosion can be protected by means of preservative coating (Anti corrosive paints) inside the shell and water boxes and by means of anodes such as zinc fitting inside water boxes.
\n6. Essential cooler for optimum efficiency can be maintained by controlling of temperature of fluid or sea water.<\/p>\n
\n1. To providing to increase numbers of pass
\n2. This increase the cooling efficiency.<\/p>\n
\nWhen engine run,<\/strong>
\n01) Oil comes out at the cooling water overboard.
\n02) Sump tank oil level will fall down.
\n03) L.O pressure will drop
\n04) If L.O cooler leaks the engine should be stopped with permission from bridge. The leakage can be detected by carrying out a hydraulic pressure test to the oil side.
\n05) After cooling down the engine stop main circulating L.O pump and main S.W cooling pump.
\n06) Close necessary valve of them
\n07) Open water box covers cooler both side.
\n08) Blank off discharge pipe of cooler oil side.
\n09) Connect hydraulic pump to inlet of cooler.
\n10) Apply oil pressure normally 1.5 times the working pressure. Then check the leakage at cooler both sides
\n11) Normally leaking tubes may be stopped by plugging
\n12) If 10% of the tubes have been leaked retubing is necessary.
\n13) Then the engine is put back normal running.<\/p>\n
\n01) Check water level insight glass fitted at cooler drain pipe.
\n02) Drain the cooler \/ taste the water
\n03) If the water continuous comes out, the cooler is leakage. Also in the funnel white & dense smoke.
\n04) Thus the engine should be stopped with permission from bridge.
\n05) Normal leaking tubes can be stopped by plugging.
\n06) Then the engine is put back normal running.<\/p>\n
\n01) Check sea water in\/out temperature difference. Less amount poor efficiency of cooler (must be high)
\n02) Check coolant medium in \/ out temperature (Difference temperature: should be low)
\n03) Feel over cooler shell, upper \udbc0\udcc6hot, middle \udbc0\udcc6warm, down \udbc0\udcc6cool is normal.
\n04) Check pump and by pass valve.<\/p>\n
\n01) To prevent the tube
\n02) To guide the flow of fluid
\n03) To increase cooling surface area
\n04) To minimize the tube vibration<\/p>\n
\n(01) Failure of ejector pump
\n(02) Failure of ejector nozzle (fouling, erosion)
\n(03) Malfunction of check valve (at ejector nozzle)
\n(04) Defective vacuum breaker
\n(05) Any air leakage into the system (At joint)<\/p>\n
\n1) Increase the salinity because of agitation. AT that time boiling rate is very high.
\n2) To control this condition: I open the vacuum breaker to maintain 93% vacuum.<\/p>\n
\n1) To produce the high purity distilled water from sea water
\n2) To provide make up water fro boiler and portable water for drinking and domestic used. So can save cost.<\/p>\n
\n\udbc0\udcac Chlorination.
\n\udbc0\udcac Ultra violet light.
\n\udbc0\udcac Libration of silver ions from the consumable.
\nImproving the platability.<\/p>\n
\nDifferent concentration solutions are separated by a semi-permeable membrane. Water from less concentrated solution pass through the membrane to equalize the concentration of the two solution. It create hydraulic pressure gradient across the membrane as the volume and level of weaker solution fall and those of the stronger solution rise.<\/p>\n
\nThe pressure greater than the osmotic is applied to the side of higher concentration, the process is reversed. Water from the stronger solution is forced back through the semi-permeable membrane to dilute the initially weak solution on the other side and further increase the concentration of the strong solution.
\nThe total pressure required for this process consists of the osmotic pressure(between 4 bar for brackish water up to 28 bar for sea water) plus the system pressure losses and net driving pressures (around 25 bar).<\/p>\n
\n1. Hollow fine fiber (aromatic polyamide or cellulose acetate spurn to form hollow fiber)
\n2. Spirally wound (cellulose acetate for backish water and polymide or polysulphonate for sea water.)<\/p>\n","protected":false},"excerpt":{"rendered":"