{"id":144266,"date":"2026-07-09T09:27:13","date_gmt":"2026-07-09T07:27:13","guid":{"rendered":"https:\/\/www.velasolaris.com\/?post_type=handbuch&#038;p=144266"},"modified":"2026-07-09T15:20:42","modified_gmt":"2026-07-09T13:20:42","slug":"high-temperature-heat-pump","status":"publish","type":"handbuch","link":"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/producers\/heat-pumps\/high-temperature-heat-pump\/","title":{"rendered":"High-Temperature Heat Pump"},"content":{"rendered":"\n<h1 id=\"h-high-temperature-heat-pump-polysun-guide\" class=\"wp-block-heading\">High-Temperature Heat Pump &#8211; Polysun Guide<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">High-temperature heat pumps (HTHPs) are gaining traction in modern energy engineering. This trend is driven by building retrofits requiring hihg flow temperatures on one hand, and industrial process heat applications on the other.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article provides a step-by-step guide to simulating an HTHP within Polysun. The technical foundation relies on an expanded CSV data profile. Unlike the <a href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/producers\/heat-pumps\/air-to-water-heat-pumps\/\">standard model<\/a>, this advanced profile explicitly incorporates the temperature differentials across both the evaporator and the condenser. Consequently, the software interpolates performance data, allowing users to map operating behavior with high accuracy.<\/p>\n\n\n\n<h2 id=\"h-thermodynamic-modeling-of-the-heat-pump\" class=\"wp-block-heading\">Thermodynamic Modeling of the Heat Pump<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Accurately mapping the thermodynamic behavior of an HTHP up to <strong>144\u00b0C<\/strong> across its entire operating range requires the evaluation of four critical variables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Evaporator Temperature (<\/strong> \\(T_V\u200b\\)<strong> ):<\/strong> This variable represents the temperature of the selected thermal source (e.g., groundwater, brine, or ambient air).<\/li>\n\n\n\n<li><strong>Condenser Outlet Temperature ( <\/strong>\\(T_K\u200b\\)<strong>\u200b ):<\/strong> This represents the flow temperature of the hydronic heating system. For high-temperature heat pumps, this value typically sits significantly above <strong>55\u00b0C<\/strong>.<\/li>\n\n\n\n<li><strong>Evaporator Temperature Differential (\u0394V):<\/strong> This defines the thermal fluid temperature split (delta) between the inlet and outlet on the source side.<\/li>\n\n\n\n<li><strong>Condenser Temperature Differential (\u0394K):<\/strong> This index defines the fluid temperature split between the inlet (return) and outlet (flow) on the sink side (heating circuit).<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-high-temperature-heat-pump-expanding-the-standard-model\" class=\"wp-block-heading\">High-Temperature Heat Pump: Expanding the Standard Model<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Accounting for individual temperature differentials empowers engineers to determine operational setpoints with pinpoint accuracy. This capability proves advantageous when dealing with variable volume flows or highly fluctuating temperature splits.<\/p>\n\n\n\n<h3 id=\"h-the-standard-model-limitation\" class=\"wp-block-heading\">The Standard Model Limitation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In the <a href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/producers\/heat-pumps\/air-to-water-heat-pumps\/\">standard model<\/a>, the simulation engine operates using fixed, non-editable temperature differentials. Therefore, adjusting the model to non-standard operating conditions is highly restricted.<\/p>\n\n\n\n<h3 id=\"h-adjustable-temperature-differentials-in-hthp-systems\" class=\"wp-block-heading\">Adjustable Temperature Differentials in HTHP Systems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Users can activate the extension of the standard model by simply importing an expanded CSV profile. This updates the <a href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/producers\/heat-pumps\/air-to-water-heat-pumps\/\">standard heat pump model <\/a>with user-definable temperature differentials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the chosen heat pump configuration, the software unlocks the following parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Brine\/Water and Water\/Water Heat Pumps:<\/strong> Users can set both \u0394V (evaporator side) and \u0394K (condenser side).<\/li>\n\n\n\n<li><strong>Air\/Water Heat Pumps:<\/strong> For these systems, users only configure \u0394K (condenser side). The column for the evaporator delta (\u0394V) is automatically omitted from the profile. This occurs because the ambient air temperature dictates the evaporator conditions directly, meaning no primary-side temperature split needs to be defined.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Note:<\/strong> Utilizing this expanded modeling approach is highly recommended for plants operating outside standard nominal rating points\u2014specifically those dealing with highly dynamic volumetric flow rates or high temperature lifts.<\/p>\n<\/blockquote>\n\n\n\n<h2 id=\"h-csv-profile-structure-for-hthp-systems\" class=\"wp-block-heading\">CSV Profile Structure for HTHP Systems<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Users define the operational data points within a profile file. The CSV layout for high-temperature heat pumps features two additional columns dedicated to temperature differentials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The complete CSV syntax is structured as follows: <code>#LoadStage[0-1];Evaporator[\u00b0C];Condenser[\u00b0C];Delta_V[K];Delta_K[K];ThermalCapacity[W];ElectricalPower[W]<\/code><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Column Name<\/th><th>Technical Meaning<\/th><th>Value Range \/ Engineering Notes<\/th><\/tr><\/thead><tbody><tr><td><strong>LoadStage<\/strong><\/td><td>Part-load ratio modulation<\/td><td>0 = System Off, 1 = Full Load operation<\/td><\/tr><tr><td><strong>Evaporator<\/strong><\/td><td>Source-side inlet temperature<\/td><td>Stated in \u00b0C (e.g., source groundwater temperature)<\/td><\/tr><tr><td><strong>Condenser<\/strong><\/td><td>Sink-side outlet temperature (Flow)<\/td><td>Stated in \u00b0C (Typical HTHP range: <strong>70\u2013100\u00b0C<\/strong>)<\/td><\/tr><tr><td><strong>Delta_V<\/strong><\/td><td>Evaporator temperature differential<\/td><td>Source split in Kelvin (Inlet minus Outlet)<\/td><\/tr><tr><td><strong>Delta_K<\/strong><\/td><td>Condenser temperature differential<\/td><td>Sink split in Kelvin (Flow minus Return)<\/td><\/tr><tr><td><strong>ThermalCapacity<\/strong><\/td><td>Net thermal energy output<\/td><td>Expressed in Watts (positive integers)<\/td><\/tr><tr><td><strong>ElectricalPower<\/strong><\/td><td>Compressor electrical power consumption<\/td><td>Expressed in Watts (positive integers)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-sample-data-entries-for-a-water-water-high-temperature-heat-pump\" class=\"wp-block-heading\">Sample Data Entries for a Water\/Water High-Temperature Heat Pump<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#HP_Model_Identifier;;;;\n#LoadStage&#091;0-1];Evaporator&#091;\u00b0C];Condenser&#091;\u00b0C];Delta_V&#091;K];Delta_K&#091;K];ThermalCapacity&#091;W];ElectricalPower&#091;W]\n0.2;-20;35;3.0;5.0;8024.2;3040.1\n0.3;-15;55;2.5;4.8;12500.0;4960.0\n0.6;0;70;2.0;6.0;21000.0;9100.0\n1.0;5;80;1.8;7.2;35000.0;16500.0\n<\/code><\/pre>\n\n\n\n<h3 id=\"h-sample-data-entries-for-an-air-water-high-temperature-heat-pump\" class=\"wp-block-heading\">Sample Data Entries for an Air\/Water High-Temperature Heat Pump<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#HP_Model_Identifier;;;;\n#LoadStage&#091;0-1];Evaporator&#091;\u00b0C];Condenser&#091;\u00b0C];Delta_K&#091;K];ThermalCapacity&#091;W];ElectricalPower&#091;W]\n0.25;-20;35;5.0;4687.5;1521.2\n0.5;-20;35;5.0;9375.0;3042.3\n0.75;-20;35;5.0;14062.5;4563.5\n1.0;-20;35;5.0;18750.0;6084.7\n<\/code><\/pre>\n\n\n\n<h2 id=\"h-critical-simulation-and-calculation-insights\" class=\"wp-block-heading\">Critical Simulation and Calculation Insights<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are three fundamental thermodynamic laws to follow when dealing with High Temperature Heat Pumps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thermal Source Boundaries:<\/strong> The evaporator temperature must always remain below the condenser temperature due to basic laws of thermodynamics.<\/li>\n\n\n\n<li><strong>Temperature Splits:<\/strong> Higher fluid temperature deltas (Temperature lift) generally result in a lower Coefficient of Performance (COP). Polysun maps this accurately by evaluating the explicit performance curves provided in the CSV profile.<\/li>\n\n\n\n<li><strong>Data Interpolation:<\/strong> User does not need to populate a data point for every conceivable operating point. Polysun interpolates within the available data points. <\/li>\n<\/ul>\n\n\n\n<h2 id=\"diagram\" class=\"wp-block-heading\">Reference Layouts for High-Temperature Heat Pump Design<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Polysun contains the following schematics for High-Temperature Heat Pumps. They can be expanded, and modified,  by doing so users can identify the optimal <a href=\"https:\/\/www.velasolaris.com\/en\/features\/heat-pump-sizing\/\">heat pump size<\/a>.<\/p>\n\n\n\n<h3 id=\"h-61a-air-to-water-high-temperature-heat-pump-in-existing-buildings\" class=\"wp-block-heading\">61a: Air-to-water high-temperature heat pump in existing buildings<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1496\" height=\"1281\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png.png\" alt=\"125kW High-Temperature Heat Pump Schematic with PV Integration, 2 Buffer Tanks and Heating\" class=\"wp-image-144320\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png.png 1496w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-300x257.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-1024x877.png 1024w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-768x658.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-1300x1113.png 1300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-200x171.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/air-to-water-high-temperature-heat-pump-system-diagram-61a.png-400x343.png 400w\" sizes=\"auto, (max-width: 1496px) 100vw, 1496px\" \/><\/figure>\n\n\n\n<h3 id=\"h-61b-industrial-process-with-high-temperature-heat-pump\" class=\"wp-block-heading\">61b: Industrial process with high-temperature heat pump<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2071\" height=\"744\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b.png\" alt=\"System diagram illustrating an industrial process with a 200 kW high-temperature heat pump, 100,000-liter buffer storage tank, and radiator heating elements for an industrial hall.\" class=\"wp-image-144322\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b.png 2071w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-300x108.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-1024x368.png 1024w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-768x276.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-1536x552.png 1536w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-2048x736.png 2048w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-1300x467.png 1300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-200x72.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/industrial-high-temperature-heat-pump-system-diagram-61b-400x144.png 400w\" sizes=\"auto, (max-width: 2071px) 100vw, 2071px\" \/><\/figure>\n\n\n\n<h3 id=\"h-61c-high-temperature-local-heating-network-with-chp-and-high-temperature-heat-pump\" class=\"wp-block-heading\">61c: High-temperature local heating network with CHP and high-temperature heat pump<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1948\" height=\"1280\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c.png\" alt=\"District Heating Schematic with Data Center Waste Heat Recovery\" class=\"wp-image-144324\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c.png 1948w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-300x197.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-1024x673.png 1024w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-768x505.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-1536x1009.png 1536w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-1300x854.png 1300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-200x131.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/high-temperature-local-heating-network-chp-heat-pump-61c-400x263.png 400w\" sizes=\"auto, (max-width: 1948px) 100vw, 1948px\" \/><\/figure>\n\n\n\n<h3 id=\"h-61d-parallel-high-temperature-heat-pumps-for-process-heat\" class=\"wp-block-heading\">61d: Parallel high-temperature heat pumps for process heat<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2044\" height=\"1263\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png.png\" alt=\"Technical schematic diagram from Polysun simulation software showing a 200 kW high-temperature brine\/water or water\/water heat pump integrated with a 100,000-liter buffer storage tank for an industrial hall heating system.\" class=\"wp-image-144326\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png.png 2044w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-300x185.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-1024x633.png 1024w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-768x475.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-1536x949.png 1536w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-1300x803.png 1300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-200x124.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/07\/parallel-high-temperature-heat-pumps-process-heat-61d.png-400x247.png 400w\" sizes=\"auto, (max-width: 2044px) 100vw, 2044px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Additional schematics for the layout of heat pumps with buffer tanks can be found in our software, or in this <a href=\"https:\/\/www.velasolaris.com\/en\/heat-pump-schematic-diagrams\/\">blog article<\/a> describing six proven and reliable schematics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"author":63643,"featured_media":0,"parent":117527,"menu_order":37,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-144266","handbuch","type-handbuch","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Polysun Guide: Simulating High-Temperature Heat Pumps<\/title>\n<meta name=\"description\" content=\"Learn how to model high-temperature heat pumps in Polysun using expanded CSV profiles. 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