{"id":521,"date":"2023-01-10T23:39:01","date_gmt":"2023-01-10T23:39:01","guid":{"rendered":"https:\/\/graywolfslair.com\/?p=521"},"modified":"2023-03-21T22:20:31","modified_gmt":"2023-03-21T22:20:31","slug":"15-3-2-counter-flow-heat-exchangers","status":"publish","type":"post","link":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-3-heat-exchangers\/15-3-2-counter-flow-heat-exchangers\/","title":{"rendered":"15.3.2 Counter flow heat exchangers"},"content":{"rendered":"\n<p>&nbsp;The other HEX design that we use is the counter flow design, which in our case is a 20&#8242; 1\/2&#8243;X .049 wall 304SS tube inside a 3\/4&#8243; 304SS tube, rolled into a convenient diameter, in our case a 10&#8243; coil.&nbsp; The heavier .049 wall is required my ASME for LPG service, in case of extrusion or butt welding defects in the tubing itself..<\/p>\n\n\n\n<p>We used Swagelok reducing compression tees to finish the ends.&nbsp; One end of the base of the tee is 3\/4&#8243; and the other is 1\/2&#8243;, with the perpendicular tee member 1\/2&#8243; as well.<\/p>\n\n\n\n<p>We drill through the 1\/2&#8243; tube pocket on the base leg, so that the 1\/2&#8243; tube passes through it, allowing us to clamp both the 3\/4&#8243; and the 1\/2&#8243; compression fittings on their respective tube.<\/p>\n\n\n\n<p>The 3\/4&#8243; jacket is where the coolant passes, with the LPG passing through the 1\/2&#8243; center tube.&nbsp; The inlet of the center tube gets a 1\/2&#8243; tube to JIC connection, but the outlet gets another 1\/2&#8243; X 1\/2&#8243; X 1\/8&#8243; compression tee, and the perpendicular leg gets a 1\/8&#8243; tubular thermocouple to track the HEX&#8217;s performance.<\/p>\n\n\n\n<p>We use 1\/2&#8243; tube to JIC connections on the rest of the ports on the pump HEX.&nbsp; On the HEX for LPG injection cooling, we use a coil of 3\/8&#8243; 304SS tubing from the LN2 Dewar liquid valve and the HEX, with compression fittings, because polymers perform poorly at those temperatures.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;The other HEX design that we use is the counter flow design, which in our case is a 20&#8242; 1\/2&#8243;X .049 wall 304SS tube inside [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[78],"tags":[],"class_list":["post-521","post","type-post","status-publish","format-standard","hentry","category-15-3-heat-exchangers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>15.3.2 Counter flow heat exchangers - GrayWolf&#039;s Lair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-3-heat-exchangers\/15-3-2-counter-flow-heat-exchangers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"15.3.2 Counter flow heat exchangers - GrayWolf&#039;s Lair\" \/>\n<meta property=\"og:description\" content=\"&nbsp;The other HEX design that we use is the counter flow design, which in our case is a 20&#8242; 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DIY Equipment&quot;","block_context":{"text":"15. DIY Equipment","link":"https:\/\/graywolfslair.com\/index.php\/category\/15-diy-equipment\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Mk-VIII-conceptual2-1-jpg.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Mk-VIII-conceptual2-1-jpg.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Mk-VIII-conceptual2-1-jpg.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Mk-VIII-conceptual2-1-jpg.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Mk-VIII-conceptual2-1-jpg.webp?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":523,"url":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-3-heat-exchangers\/15-3-3-tri-coil-heat-exchanger-design\/","url_meta":{"origin":521,"position":1},"title":"15.3.3 Tri Coil Heat Exchanger Design","author":"GrayWolf","date":"January 10, 2023","format":false,"excerpt":"We used a couple different heat exchanger designs at WolfWurx, depending on application.\u00a0 One was the Tri Coil HEX, which we built ourselves using a stainless pot to hold chilling bath, in which were submerged three 1\/2\" 304SS stainless coils.\u00a0 Two are 20' long and stacked one on top of\u2026","rel":"","context":"In &quot;15.3 Heat exchangers&quot;","block_context":{"text":"15.3 Heat exchangers","link":"https:\/\/graywolfslair.com\/index.php\/category\/15-diy-equipment\/15-3-heat-exchangers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/Tricore-heat-exchanger-assy-jpg.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":646,"url":"https:\/\/graywolfslair.com\/index.php\/16-commercial-equipment\/16-3-plant-tours\/16-3-1-subzero-scientific\/","url_meta":{"origin":521,"position":2},"title":"16.3.1 Subzero Scientific","author":"GrayWolf","date":"January 11, 2023","format":false,"excerpt":"One of Graywolf\u2019s Lair new columns is about my visits to local cannabis equipment manufacturers, and I started with Subzero Scientific, handily located in Gresham, OR.\u00a0 I started with Subzero Scientific because they are not only a major player in the cannabis equipment arena, but Gresham is close to Portland,\u2026","rel":"","context":"In &quot;16.3 Plant tours&quot;","block_context":{"text":"16.3 Plant tours","link":"https:\/\/graywolfslair.com\/index.php\/category\/16-commercial-equipment\/16-3-plant-tours\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/CNC-and-saw2-jpg.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/CNC-and-saw2-jpg.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/CNC-and-saw2-jpg.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/CNC-and-saw2-jpg.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/graywolfslair.com\/wp-content\/uploads\/2023\/04\/CNC-and-saw2-jpg.webp?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":580,"url":"https:\/\/graywolfslair.com\/index.php\/15-diy-equipment\/15-30-behold-the-mk-iii-evolution-and-ancillaries\/","url_meta":{"origin":521,"position":3},"title":"15.30 Behold the Mk III Evolution and ancillaries","author":"GrayWolf","date":"January 11, 2023","format":false,"excerpt":"While I first shared the Terpenator design on 2-7-2011 on both SPR and IC Mag, and subsequently the fully automated Mk II, it was really the manual Mk III shared on 9-19-2012 that gained a foot hold and went viral.\u00a0 https:\/\/www.icmag.com\/ic\/showthread.php?t=245953&highlight=The+Mk+III+Terpenator It was also the design that I subsequently expanded\u2026","rel":"","context":"In &quot;15. DIY Equipment&quot;","block_context":{"text":"15. 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