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<?xml version="1.0" encoding="UTF-8" ?><rss version="2.0"><channel> <title>front_page</title> <description>Front page of site</description> <link>https://www.cheresources.com/invision</link> <pubDate>Thu, 03 Apr 2025 08:44:20 +0000</pubDate> <ttl>180</ttl> <item> <title>Liquid Liquid Separator Sizing</title> <link>https://www.cheresources.com/invision/topic/32422-liquid-liquid-separator-sizing/</link> <description><![CDATA[<p>Hi everyone,</p><p> </p><p>I am currently designing a liquid-liquid separator for a mixture of FFA-glycerine with methanol. The process is as follows: the crude glycerine is sent to a process called acidification, where impurities, especially MONG, are removed by adding acid. After acidification, the mixture is sent to a decanter, where it separates into a layer of FFA-glycerine.</p><p> </p><p>At this stage, I am designing the separator but am feeling a bit lost, particularly when it comes to assuming the properties to be used. I also have doubts about some of the values I’ve already calculated. As someone new to the industry and a recent graduate, I am reaching out for your help and expertise.</p><p> </p><p>Attached is the work I have already started.</p><p> </p><p><a href='https://drive.google.com/file/d/15eLSW9ukIXchpEUGBxoJ7aRByLHVhuIt/view?usp=sharing' class='bbc_url' title='' rel='nofollow'>https://drive.google.com/file/d/15eLSW9ukIXchpEUGBxoJ7aRByLHVhuIt/view?usp=sharing</a></p>]]></description> <pubDate>Thu, 03 Apr 2025 08:44:20 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32422-liquid-liquid-separator-sizing/</guid> </item> <item> <title>Discussion - Predict Storage Tank Heat Transfer Precisely By Jimmy D K</title> <link>https://www.cheresources.com/invision/topic/32413-discussion-predict-storage-tank-heat-transfer-precisely-by-jimmy-d-kumana-and-samir-p-kothari/</link> <description><![CDATA[<p>Hello,</p><p> </p><p>I am try to use the calculation method defined in the paper published by Jimmy D Kumana and Samir P Kothari to Predict Storage tank heat transfer precisely. </p><p>Here is the link of a post in this forum -</p><p> </p><p><a href='https://www.cheresources.com/invision/topic/9066-storage-tank-heat-loss-calculation-based-on-kumana-and-kothari-article/' class='bbc_url' title=''>https://www.cheresources.com/invision/topic/9066-storage-tank-heat-loss-calculation-based-on-kumana-and-kothari-article/</a></p><p><a href='https://www.cheresources.com/invision/topic/28427-natural-convection-heat-transfer-coefficient-inside-storage-tanks/' class='bbc_url' title=''>https://www.cheresources.com/invision/topic/28427-natural-convection-heat-transfer-coefficient-inside-storage-tanks/</a></p><p> </p><p>is it possible to use this calculation method with a vertical, outside, atmospheric storage tank with an agitator, which adds forced convection component in the calculation.</p><p>Will it be correct to replace the Natural convection parts in the calculation with a forced convection?</p><p>here are some articles showing how to calculate the inside heat transfer coefficient of tank with an agitator. </p><p> </p><p><a href='https://pdhonline.com/courses/k102/k102content.pdf' class='bbc_url' title='' rel='nofollow'>https://pdhonline.com/courses/k102/k102content.pdf</a></p><p><a href='https://www.thermopedia.com/content/547/' class='bbc_url' title='' rel='nofollow'>https://www.thermopedia.com/content/547/</a></p><p> </p><p>please share your thoughts. it will be really helpful.</p><p> </p><p>Thank you,</p><p>Raj Shekhar Ghosh</p>]]></description> <pubDate>Tue, 25 Mar 2025 11:23:41 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32413-discussion-predict-storage-tank-heat-transfer-precisely-by-jimmy-d-kumana-and-samir-p-kothari/</guid> </item> <item> <title>Resistance K Of Reducers</title> <link>https://www.cheresources.com/invision/topic/32410-resistance-k-of-reducers/</link> <description><![CDATA[<p>Hello,<br>I have a question regarding the resistance <span><span><span><span>K</span></span></span></span> values for reducers and enlargers, as the calculated values appear to be excessively high.</p><p>Based on my research, I found that there are three commonly referenced sources for resistance <span><span><span><span>K</span></span></span></span> values:</p><p> </p><p><strong>1. Crane</strong></p><p> </p><p><strong>2. 3K-Method</strong></p><p> </p><p><strong>3. API 521</strong></p><p> </p><p>Among these, the Crane and 3K-Method approaches tend to produce very high <span><span><span><span>K</span></span></span></span> values, which result in significant pressure drops.<br>In contrast, although the <span><span><span><span>K</span></span></span></span> values from <strong>API 521</strong> are quite low, they are similar to the <strong>exit and entrance <span><span><span><span>K</span></span></span></span> values</strong> found in <strong>Crane</strong>.</p><p>Additionally, I am unsure whether the resistance <span><span><span><span>K</span></span></span></span> values represent <strong>only frictional losses</strong>, or if they also account for <strong>losses due to changes in pipe diameter</strong> (i.e., expansion or contraction effects).</p><p>I am currently performing discharge line sizing in order to calculate the backpressure.</p><p>Could you please clarify this?</p>]]></description> <pubDate>Fri, 21 Mar 2025 02:41:07 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32410-resistance-k-of-reducers/</guid> </item> <item> <title>Minimize Particles Carryover In Reduction Autoclave</title> <link>https://www.cheresources.com/invision/topic/32390-minimize-particles-carryover-in-reduction-autoclave/</link> <description><![CDATA[<p>Guys,</p><p> </p><p>I would like to discuss about different methods on reducing solids carryover in our reduction autoclave. </p><p>Particle size distribution: 100 to 350 US mesh. </p><p>Allowed particle settling time: 10 minutes.</p><p>Discharge pressure: 1500 kpag to an atmospheric tank</p><p>Discharge line size: 1-1/2". </p><p> </p><p>Question is: methods to reduce solids carryover through discharge. </p><p>I have a few ideas: 1. increase settling time, 2. decrease discharge pressure, 3. design a riser at the discharge</p><p>Simple drawing is attached.</p><p> </p><p>Regards,</p>]]></description> <pubDate>Wed, 19 Mar 2025 21:20:28 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32390-minimize-particles-carryover-in-reduction-autoclave/</guid> </item> <item> <title>Alkaline Electrolytic Cell/stack Sizing/design For H2 Production</title> <link>https://www.cheresources.com/invision/topic/32384-alkaline-electrolytic-cellstack-sizingdesign-for-h2-production/</link> <description><![CDATA[<p>Dear all,</p><p>Can anyone suggest some resource that explains the Alkaline electrolytic cell/stack Sizing/design for H2 production. could be book, tutorials, videos,.......etc.<br>Many Thanks in advance.</p>]]></description> <pubDate>Thu, 13 Mar 2025 15:08:23 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32384-alkaline-electrolytic-cellstack-sizingdesign-for-h2-production/</guid> </item> <item> <title>Multiport Selector Valve (Msv)</title> <link>https://www.cheresources.com/invision/topic/32383-multiport-selector-valve-msv/</link> <description><![CDATA[<span style="color:rgb(0,0,0)"><span style='font-family: Segoe UI'><span style="font-size:14px">Dear engineers,</span></span></span><br><br><span style="color:rgb(0,0,0)"><span style='font-family: Segoe UI'><span style="font-size:14px">We are in the FEED stage of designing a facility to produce 50 KBOPD. We have 6 well pads to achieve this production. Each well pad is with an oil gathering manifold. The consultant recommends the manifolds be provided with a multiport selector valves, comprising a housing with many production inlets, allowing for the diversion and testing of fluid from any individual line through a rotating plug, while the remaining lines continue to flow to a common group outlet instead using a conventional manifolds, which includes separate production and test headers. The justification of Consultant for using multiport selector valves is that they require less space, reduce manual operation and human error</span></span></span><br><br><span style="color:rgb(0,0,0)"><span style='font-family: Segoe UI'><span style="font-size:14px">In all our facilities, we use a conventional manifold instead of a multiselector manifold since our current and future facilities are onshore ones and we have space so there is no issue with it</span></span></span><br><br><span style="color:rgb(0,0,0)"><span style='font-family: Segoe UI'><span style="font-size:14px">Is there anyone here with experience in multiport selector valves? and Which manifold is preferred and has better availability? is it coventional or multiselector one If you could provide me with documents explaining these valves, because I have been looking for documents about them and I have not been finding any information, only simple product bulletins.</span></span></span><br><br><br><span style="color:rgb(0,0,0)"><span style='font-family: Segoe UI'><span style="font-size:14px">Thank you in advance.</span></span></span>]]></description> <pubDate>Wed, 12 Mar 2025 08:43:00 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32383-multiport-selector-valve-msv/</guid> </item> <item> <title>Transfer Water By Gravity - Maximum Velocity Criteria</title> <link>https://www.cheresources.com/invision/topic/32380-transfer-water-by-gravity-maximum-velocity-criteria/</link> <description><![CDATA[<p>Hello,</p><p>we want to transfer water by gravity(length of pipe is more than 1000m). In design criteria max velocity for gravity line is 0.6 m/s.</p><p>why shall be velocity low in gravity line?If the height difference between the source and destination is such that the fluid is transported to the destination, but the velocity in the 18-inch line is 2 m/s, is there a problem?</p>]]></description> <pubDate>Wed, 05 Mar 2025 14:19:25 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32380-transfer-water-by-gravity-maximum-velocity-criteria/</guid> </item> <item> <title>Centriugal Compressor</title> <link>https://www.cheresources.com/invision/topic/32379-centriugal-compressor/</link> <description><![CDATA[<p>Dears</p><p> </p><p>I want to know the suction and dischrge of centrifugal compressor must vertial together ?</p><p> </p><p>I would so pleased tell which standard mentiond it.</p><p> </p><p>Best Regard</p><p> </p><p>M.R.Rahimzadeh</p>]]></description> <pubDate>Sun, 02 Mar 2025 09:44:38 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32379-centriugal-compressor/</guid> </item> <item> <title>How To Remove The Condensate In A Wet Gas Stream</title> <link>https://www.cheresources.com/invision/topic/32367-how-to-remove-the-condensate-in-a-wet-gas-stream/</link> <description><![CDATA[<p>We have a scrubber fan in our outlet vent pipe of a reaction mixer. The reaction has as product CO2, H2O, and the decomposition of Nitric acid NO2 and O2. The gas is a wet gas that goes into a scrubber. The fan has been installed in the lower point of the pipework, therefore with ambient temperatures we are getting some condensation. Is there anything out there in the market sort of like steam trap that we could install before the fan to trap the condensate?</p><p> </p><p>Would a knockout pot work? or a condensate pot? something like that?</p><p> </p><p>Much appreciate all the help</p>]]></description> <pubDate>Tue, 25 Feb 2025 08:22:28 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32367-how-to-remove-the-condensate-in-a-wet-gas-stream/</guid> </item> <item> <title>Steam Blowing</title> <link>https://www.cheresources.com/invision/topic/32366-steam-blowing/</link> <description><![CDATA[<p>I’m a member of the Commissioning team working on our greenfield refinery project. We have steam pipelines with a minimum length of 10 KM and a maximum length of 20 KM, including laterals for consumers. Before steam blowing activity, do we need to perform rotomol cleaning? Additionally, due to the pipeline’s long length, there are numerous drip legs. What are the chances of these drip legs getting clogged with dust, rust, or scale? Is there a method to reduce the issue of dislodged scale and minimize the time required for steam header commissioning?</p>]]></description> <pubDate>Mon, 24 Feb 2025 11:42:40 +0000</pubDate> <guid isPermaLink="false">https://www.cheresources.com/invision/topic/32366-steam-blowing/</guid> </item></channel></rss>If you would like to create a banner that links to this page (i.e. this validation result), do the following:
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