{"id":4604,"date":"2026-09-10T19:27:29","date_gmt":"2026-09-11T02:27:29","guid":{"rendered":"https:\/\/www.26yc.com\/heat-exchanger-pressure-drop\/"},"modified":"2026-10-08T23:36:09","modified_gmt":"2026-10-09T06:36:09","slug":"heat-exchanger-pressure-drop","status":"publish","type":"post","link":"https:\/\/www.26yc.com\/zh_cn\/heat-exchanger-pressure-drop\/","title":{"rendered":"\u6362\u70ed\u5668\u538b\u964d\u4e0e\u98ce\u673a\u80fd\u8017"},"content":{"rendered":"<p>A heat exchanger only saves energy if the recovered heat exceeds the extra electricity needed to push air through it. That trade-off is governed by <strong>\u538b\u964d<\/strong>.<\/p>\n<h2>What Drives Pressure Drop?<\/h2>\n<ul>\n<li>\u8fce\u9762\u98ce\u901f\uff08\u901f\u5ea6\u8d8a\u9ad8\uff0c\u4e0a\u5347\u8d8a\u9661\uff09<\/li>\n<li>\u82af\u4f53\u6df1\u5ea6\u4e0e\u677f\u7247\u6570\u91cf<\/li>\n<li>\u8868\u9762\u6ce2\u7eb9\u4e0e\u6d82\u5c42\u539a\u5ea6<\/li>\n<li>\u7fc5\u7247\u4e0a\u7684\u7c89\u5c18\u6216\u7ea4\u7ef4\u9644\u7740<\/li>\n<\/ul>\n<h2>Reading a Performance Curve<\/h2>\n<p>\u5382\u5bb6\u4f1a\u516c\u5e03\u538b\u964d\u4e0e\u98ce\u91cf\u7684\u5173\u7cfb\u3002\u826f\u597d\u7684\u8bbe\u8ba1\u5de5\u4f5c\u5728\u66f2\u7ebf\u8f83\u5e73\u7f13\u7684\u90e8\u5206\u2014\u2014\u677f\u7fc5\u901a\u5e38\u8fce\u9762\u98ce\u901f\u4e3a2~3 m\/s\u3002\u8d85\u51fa\u8fd9\u4e00\u8303\u56f4\uff0c\u98ce\u673a\u529f\u7387\u7684\u4e0a\u5347\u4f1a\u5feb\u4e8e\u56de\u6536\u7684\u70ed\u91cf\u3002<\/p>\n<h2>Calculating Net Savings<\/h2>\n<p>\u51c0\u8282\u7ea6 \uff1d \u56de\u6536\u7684\u70ed\u80fd \u2212 \u98ce\u673a\u989d\u5916\u80fd\u8017\u3002\u7ecf\u9a8c\u6cd5\u5219\uff1a\u9664\u975e\u6548\u7387\u6536\u76ca\u5f88\u5927\uff0c\u5426\u5219\u901a\u98ce\u5e94\u7528\u5e94\u5c06\u9644\u52a0\u538b\u964d\u4fdd\u6301\u5728100~150 Pa\u4ee5\u4e0b\u3002<\/p>\n<h2>Design Tips<\/h2>\n<ul>\n<li>\u4f7f\u7528EC\u63d2\u4ef6\u5f0f\u98ce\u673a\u4ee5\u6355\u83b7\u90e8\u5206\u8d1f\u8377\u6548\u7387\u3002<\/li>\n<li>\u589e\u8bbe\u9884\u8fc7\u6ee4\u5668\u4ee5\u4fdd\u6301\u82af\u4f53\u6e05\u6d01\u3002<\/li>\n<li>\u63d0\u4f9b\u5b9a\u671f\u6e05\u6d17\u7684\u68c0\u4fee\u901a\u9053\u3002<\/li>\n<li>\u8981\u6a21\u62df\u5168\u5e74\uff0c\u800c\u4e0d\u4ec5\u662f\u8bbe\u8ba1\u65e5\u3002<\/li>\n<\/ul>\n<p>Put pressure drop next to recovered energy early in the selection, not after. Apply the fan affinity laws when forecasting part-load savings: halving flow roughly quarters the fan power, so variable-speed control pays back fast on duty with wide load swings. Track specific fan power, the watts per cubic meter per second of air moved, as a single figure of merit across competing cores. Use the published performance curve rather than a single point, and model the annual load profile so the design sits on the efficient part of the curve for most hours. Pre-filtration and a cleaning plan protect that position over time. Our <a href=\"https:\/\/www.26yc.com\/zh_cn\/ntu-effectiveness-method\/\">performance methodology<\/a> explains how effectiveness and pressure drop trade off in practice.<\/p>\n<h2>\u5e38\u89c1\u95ee\u9898<\/h2>\n<p><strong>\u66f4\u5927\u7684\u82af\u4f53\u603b\u662f\u66f4\u597d\u5417\uff1f<\/strong><br \/>\n\u4e0d\u4e00\u5b9a\u3002\u66f4\u6df1\u7684\u82af\u4f53\u63d0\u9ad8\u6548\u7387\uff0c\u4f46\u4e5f\u589e\u52a0\u538b\u964d\uff1b\u9700\u4f18\u5316\u7ec4\u5408\u3002<\/p>\n<p><strong>\u6211\u5e94\u8be5\u591a\u4e45\u6e05\u6d17\u4e00\u6b21\uff1f<\/strong><br \/>\n\u5728\u591a\u7c89\u5c18\u5de5\u51b5\u4e0b\u6bcf\u5b63\u5ea6\u68c0\u67e5\uff1b\u5f53\u538b\u964d\u6bd4\u57fa\u7ebf\u5347\u9ad815~20%\u65f6\u8fdb\u884c\u6e05\u6d17\u3002<\/p>\n<div class=\"yc-related\">\n<h3>\u76f8\u5173\u6587\u7ae0<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.26yc.com\/zh_cn\/psychrometric-processes-heat-recovery\/\">Psychrometric Processes in Heat Recovery: What Happens on the Chart<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/zh_cn\/ntu-effectiveness-method\/\">The epsilon-NTU Method: Predicting Heat Exchanger Performance<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/zh_cn\/dew-point-and-frost-point\/\">Dew Point and Frost Point: The Temperatures That Decide Core Survival<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/zh_cn\/brazed-vs-gasketed-plate-heat-exchangers\/\" title=\"Brazed Plate vs Gasketed Plate Heat Exchangers\">Brazed Plate vs Gasketed Plate Heat Exchangers<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A heat exchanger only saves energy if the recovered heat exceeds the extra electricity needed to push air through it. That trade-off is governed by pressure drop. What Drives Pressure Drop? Face velocity (higher speed = steeper rise) Core depth and plate count Surface corrugation and coating thickness Dust or fiber loading on fins Reading [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[243,197],"tags":[223,222],"class_list":["post-4604","post","type-post","status-publish","format-standard","hentry","category-design-calc","category-encyclopedia","tag-fan-energy","tag-pressure-drop"],"_links":{"self":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/comments?post=4604"}],"version-history":[{"count":3,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4604\/revisions"}],"predecessor-version":[{"id":5157,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4604\/revisions\/5157"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/media?parent=4604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/categories?post=4604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/tags?post=4604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}