{"id":9915,"date":"2026-03-10T13:56:32","date_gmt":"2026-03-10T18:56:32","guid":{"rendered":"https:\/\/informatech.energir.com\/?p=9915"},"modified":"2026-03-20T15:56:23","modified_gmt":"2026-03-20T20:56:23","slug":"three-solutions-for-optimizing-process-waste-energy-recovery","status":"publish","type":"post","link":"https:\/\/informatech.energir.com\/?p=9915&lang=en","title":{"rendered":"Three solutions for optimizing process waste energy recovery"},"content":{"rendered":"<div id=\"pl-9915\" class=\"panel-layout\"><div id=\"pg-9915-0\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-0-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-0-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child\" data-index=\"0\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<h2>Recovering waste heat offers significant energy potential, particularly in industrial settings, where it can help companies reduce energy consumption (and therefore operating costs) while also lowering their carbon footprint by reusing energy that would otherwise be lost. In this article, we present three process steam recovery technologies, how they work, their main characteristics and their potential applications.<\/h2>\n<\/div>\n<\/div><\/div><div id=\"panel-9915-0-0-1\" class=\"so-panel widget widget_sow-editor panel-last-child\" data-index=\"1\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"width: 100%; height: 100%;\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody class=\"tableau-texte\">\n<tr style=\"height: 20px;\">\n<td>\n<h2 style=\"margin-block-end: 0.5em!important;\">A few facts about steam<sup style=\"font-size: 0.6em;\">1<\/sup><\/h2>\n<ul style=\"list-style-type: disc;\">\n<li>A given mass of steam can contain five to six times more energy than an equivalent mass of water.<\/li>\n<li>Steam enables heat transfer rates two to five times higher than hot water.<\/li>\n<li>It can be generated with high efficiency, often above 80%.<\/li>\n<li>It can be easily distributed by creating a pressure differential in the steam system.<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-1\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-1-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-1-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"2\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"border-collapse: collapse; width: 100%; margin: 0; padding: 0;\" border=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 5%; text-align: left; vertical-align: middle; padding: 0;\"><img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"105\" class=\"alignnone size-full wp-image-9843\" style=\"width: 50px; height: 50px; max-width: none; display: block; margin: 0; padding: 0;\" src=\"https:\/\/informatech.energir.com\/wp-content\/uploads\/2026\/03\/chiffres_stencil_1.png\" alt=\"\" srcset=\"https:\/\/informatech.energir.com\/wp-content\/uploads\/2026\/03\/chiffres_stencil_1.png 105w, https:\/\/informatech.energir.com\/wp-content\/uploads\/2026\/03\/chiffres_stencil_1-60x60.png 60w\" sizes=\"(max-width: 105px) 100vw, 105px\"\/><\/td>\n<td style=\"text-align: left; vertical-align: middle; width: 95%; padding: 0;\">\n<h2 style=\"text-align: left; margin: 0;\">Heat recovery boilers: Powerful technology for producing steam and hot water<\/h2>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-2\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-2-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-2-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"3\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<p>A heat recovery boiler produces steam and\/or hot water without additional combustion, thereby reducing primary energy consumption.<\/p>\n<p>The system typically uses a tube heat exchanger to capture heat contained in high-temperature waste streams&mdash;such as exhaust gases from turbines, engines or industrial dryers, flue gases or liquid effluents&mdash;to produce saturated steam (3 bar to 16 bar) and\/or hot water (80&deg;C to 120&deg;C). When the temperature of the thermal discharge is moderate, the boiler can be coupled to a heat pump to optimize heat recovery.<\/p>\n<blockquote>\n<p>Equipped with an economizer and proper insulation, a heat recovery boiler can achieve efficiencies of 85% or more.<sup style=\"font-size: 0.6em;\">2<\/sup>.<\/p>\n<\/blockquote>\n<p>Thanks to its versatility, a heat recovery boiler can easily be integrated into an existing thermal network and is particularly well suited to industrial facilities where waste heat is available at temperatures above 120&deg;C, such as in food processing plants, pulp and paper mills, chemical plants, refineries and cement plants.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div><\/div><\/div><div id=\"pgc-9915-2-1\" class=\"panel-grid-cell\"><div id=\"panel-9915-2-1-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"4\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"width: 100%; height: 160px;\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody class=\"tableau-texte\">\n<tr style=\"height: 20px;\">\n<td style=\"height: 160px;\">\n<h3 style=\"margin: 5px 0 0 0;\">Spent grain dryers: A practical example<\/h3>\n<p>In spent grain dryers used in the agri-food and brewing industries, the mixture of flue gas and humid air typically reaches temperatures of 150&deg;C to 200&deg;C. This heat can be recovered using an air-to-water heat exchanger and transferred to a recovery boiler to produce steam (3 bar to 8 bar) or auxiliary hot water (80&deg;C to 120&deg;C), allowing a significant portion of the energy consumed by the dryer to be recovered.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-3\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-3-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-3-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"5\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"border-collapse: collapse; width: 100%; margin: 0; padding: 0;\" border=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 5%; text-align: left; vertical-align: middle; padding: 0;\"><img decoding=\"async\" class=\"alignnone size-full wp-image-9843\" style=\"width: 50px; height: 50px; max-width: none; display: block; margin: 0; padding: 0;\" src=\"https:\/\/informatech.energir.com\/wp-content\/uploads\/2026\/03\/chiffres_stencil_2.png\" alt=\"\"\/><\/td>\n<td style=\"text-align: left; vertical-align: middle; width: 95%; padding: 0;\">\n<h2 style=\"text-align: left; margin: 0;\">Thermal vapour recompression: A cost-effective and affordable technology<\/h2>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-4\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-4-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-4-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"6\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<p>In industrial processes, low-pressure steam flows (flash steam) are typically routed to lower-pressure processes, to a condenser or vented to the atmosphere, resulting in a net energy loss.<\/p>\n<p>A thermal vapour recompression (TVR) system recovers this steam using a device called a thermocompressor, which has three connections: two inlets (high pressure and low pressure) and one outlet (medium pressure). To capture the energy contained in low-pressure steam, high-pressure motive steam is injected into the thermocompressor and accelerated as it exits the nozzle. This creates a Venturi effect that draws the residual steam into the mixing chamber, where the two flows combine to produce an intermediate-pressure steam stream ready to be reused in an industrial process.<\/p>\n<p>For optimal performance, a thermocompressor must be designed according to steam flow rates, suction pressure, motive steam pressure and system type. With few moving parts and no wear components, thermocompressors are reliable and durable.<\/p>\n<blockquote><p>A conventional thermocompressor offers very attractive efficiency compared with more complex systems such as multi-nozzle configurations.<\/p><\/blockquote>\n<p>TVR is particularly well suited to applications such as evaporation, distillation, drying and desalination, especially in the agri-food, chemical, pharmaceutical, and pulp and paper industries.<\/p>\n<\/div>\n<\/div><\/div><\/div><div id=\"pgc-9915-4-1\" class=\"panel-grid-cell\"><div id=\"panel-9915-4-1-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"7\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"width: 100%; height: 100%;\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody class=\"tableau-texte\">\n<tr style=\"height: 20px;\">\n<td>\n<h3 style=\"margin: 5px 0 0 0;\">TVR applied to paper drying<\/h3>\n<p>The dryers in a paper machine are supplied with steam, which condenses in the rotating dryers and must be discharged to a tank where steam and condensate are separated. A siphon removes the condensate by creating a pressure differential and carrying it along with the steam. To maintain sufficiently low pressure in the siphon and allow the mixture to flow, a thermocompressor is used to draw in the entrainment steam and the portion of condensate that has re-evaporated at the lower pressure.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-5\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-5-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-5-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"8\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"border-collapse: collapse; width: 100%; margin: 0; padding: 0;\" border=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 5%; text-align: left; vertical-align: middle; padding: 0;\"><img decoding=\"async\" class=\"alignnone size-full wp-image-9843\" style=\"width: 50px; height: 50px; max-width: none; display: block; margin: 0; padding: 0;\" src=\"https:\/\/informatech.energir.com\/wp-content\/uploads\/2026\/03\/chiffres_stencil_3.png\" alt=\"\"\/><\/td>\n<td style=\"text-align: left; vertical-align: middle; width: 95%; padding: 0;\">\n<h2 style=\"text-align: left; margin: 0;\">Mechanical vapour recompression: A complex, high-efficiency technology<\/h2>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-6\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-6-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-6-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child\" data-index=\"9\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<p>Mechanical vapour recompression (MVR) is an advanced evaporation technology that recycles the latent heat of vapour by using a mechanical compressor to compress the vapour produced during liquid evaporation to a higher pressure and temperature than the inlet vapour, allowing it to be reused as a heating medium.<\/p>\n<p>Among low-pressure steam recovery technologies, MVR offers the highest energy efficiency and the greatest steam savings (more than 100 kg of water evaporated per kg of steam). By comparison, thermal vapour recompression (TVR) typically achieves between 1&nbsp;and&nbsp;10 kg of water per kg of steam. MVR can also be combined with a multi-effect system featuring several evaporators in series to further increase thermal efficiency.<\/p>\n<p>MVR is particularly well suited to high-concentration, energy-intensive evaporation stages where other methods become less efficient due to reduced heat transfer and higher energy cost per kilogram of water removed. It supplies higher-temperature steam for heating, operates with low temperature differentials to prevent thermal degradation and minimizes the use of live steam, which is generally required only for preheating. Although it is by far the most efficient technology, it is also the most costly and complex because it requires a compressor.<\/p>\n<blockquote><p>MVR is therefore the highest-performing low-pressure steam recovery technology, but also the most costly and complex.<\/p><\/blockquote>\n<p>MVR is particularly attractive for processes such as evaporation concentration and crystallization in sectors including food processing, pulp and paper, water treatment, chemicals and pharmaceuticals.<\/p>\n<\/div>\n<\/div><\/div><div id=\"panel-9915-6-0-1\" class=\"so-panel widget widget_sow-editor\" data-index=\"10\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<table style=\"width: 100%; height: 100%;\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody class=\"tableau-texte\">\n<tr style=\"height: 20px;\">\n<td>\n<h3 style=\"margin: 5px 0 0 0;\">MVR for sugar drying<\/h3>\n<p>MVR systems minimize live steam consumption during sugar evaporation by mechanically recompressing flash vapour and reusing it as the primary heat source. Compared with single-effect, multi-effect or TVR-only (steam ejector) systems, MVR significantly reduces specific steam demand while maintaining a stable temperature differential in the evaporators. Compared with a triple-effect evaporator, for example, an MVR system can reduce steam consumption by 80 to 95% Residual steam is mainly used for start-up and to compensate for losses.<\/p>\n<p>For greater precision, hybrid TVR&ndash;MVR configurations are often used. TVR provides bulk recompression at low capital cost and debottlenecks the initial stage of sugar drying, while MVR reduces load and stabilizes operation at the end of the process, optimizing the electricity-to-steam cost balance.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><div id=\"panel-9915-6-0-2\" class=\"so-panel widget widget_sow-editor panel-last-child\" data-index=\"11\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<h3>&Eacute;nergir provides technical and financial support for your decarbonization projects<\/h3>\n<p style=\"font-weight: 400;\">Want to learn more about low-pressure steam recovery or explore how it could be implemented in your organization? <a href=\"mailto:datech@energir.com\">Contact the DATECH team<\/a>&mdash;we are here to support the success of your decarbonization initiatives. Implementing such a system may also make you eligible for financial assistance under the <a href=\"https:\/\/energir.com\/en\/business\/energy-efficiency\/energy-efficiency-programs\/studies-and-implementation\" target=\"_blank\" rel=\"noopener\">Studies and Implementation<\/a> stream of &Eacute;nergir&rsquo;s Energy Audit and Implementation Program.<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><div id=\"pg-9915-7\" class=\"panel-grid panel-no-style\"><div id=\"pgc-9915-7-0\" class=\"panel-grid-cell\"><div id=\"panel-9915-7-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child\" data-index=\"12\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<p>S&eacute;bastien Lajoie, Eng.<br>\nLeader, Energy Expertise<\/p>\n<p>Donald Beverly, Eng.<br>\nLeader, Energy Expertise<\/p>\n<p>&Eacute;ric &Eacute;mond, P. eng.<br>\nSenior Advisor, Energy Expertise<\/p>\n<p><a href=\"https:\/\/energir.com\/en\/business\/customer-centre\/contact-us\/groupe-datech\" target=\"_blank\" rel=\"noopener\">DATECH Group<\/a><\/p>\n<\/div>\n<\/div><\/div><div id=\"panel-9915-7-0-1\" class=\"so-panel widget widget_sow-editor panel-last-child\" data-index=\"13\"><div class=\"so-widget-sow-editor so-widget-sow-editor-base\">\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<h6><sup>1<\/sup> Source : <a href=\"https:\/\/savree.com\/en\/encyclopedia\/steam\">https:\/\/savree.com\/en\/encyclopedia\/steam<\/a><br>\n<sup>2<\/sup> Source : <a href=\"https:\/\/energir.com\/en\/business\/energy-efficiency\/energy-efficiency-programs\/boilersystems\">https:\/\/energir.com\/en\/business\/energy-efficiency\/energy-efficiency-programs\/boilersystems<\/a><\/h6>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Recovering waste heat offers significant energy potential, particularly in industrial settings, where it can help companies reduce energy consumption (and therefore operating costs) while also lowering their carbon footprint by reusing energy that would otherwise be lost. In this article, &hellip; <a href=\"https:\/\/informatech.energir.com\/?p=9915&amp;lang=en\">Lire la suite<\/a><\/p>\n","protected":false},"author":11,"featured_media":9840,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[198],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"Learn how recovering heat from effluents can reduce your energy costs, decrease GHG emissions and help you decarbonize your buildings.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/informatech.energir.com\/?p=9915&#038;lang=en\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effluent heat 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