{"id":5914,"date":"2026-08-24T08:11:50","date_gmt":"2026-08-24T08:11:50","guid":{"rendered":"https:\/\/drolin-box.com\/?p=5914"},"modified":"2026-08-24T08:31:53","modified_gmt":"2026-08-24T08:31:53","slug":"dry-cooler-sizing-liquid-cooling-mining-farms","status":"publish","type":"post","link":"https:\/\/drolin-box.com\/kk\/dry-cooler-sizing-liquid-cooling-mining-farms\/","title":{"rendered":"How to Size a Dry Cooler for Liquid Cooling Mining Farms"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5914\" class=\"elementor elementor-5914\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-9a5ebd7 e-flex e-con-boxed e-con e-parent\" data-id=\"9a5ebd7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-eb7582a elementor-widget elementor-widget-text-editor\" data-id=\"eb7582a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"1 1 []\">A 1MW mining farm can still overwhelm a dry cooler labeled \u201c1MW.\u201d<\/p><p>The label may be technically correct at a 25\u00b0C ambient temperature, a generous fluid temperature, clean coils, full fan speed and pure water. Move that same unit to a 40\u00b0C mining site, demand colder coolant, add glycol and allow dust to build on the coil, and its available heat rejection can fall well below the catalog number.<\/p><p>That is the real dry cooler sizing problem.<\/p><p>Do not buy a dry cooler by matching its nominal megawatt rating to the mining farm\u2019s electrical capacity. Size the entire thermal chain:<\/p><p><strong>ASIC heat load \u2192 Technology cooling loop \u2192 CDU \u2192 Facility loop \u2192 Dry cooler \u2192 Outdoor air<\/strong><\/p><p>Every arrow represents a temperature, flow, pressure or capacity limit. If one component is selected under a different operating condition, the whole liquid cooling system may lose capacity on the hottest day of the year.<\/p><h2>1. The Nameplate Capacity Trap<\/h2><p>A dry cooler does not have one fixed cooling capacity.<\/p><p>Its available capacity changes with:<\/p><ul data-spread=\"false\"><li><p>Outdoor dry-bulb temperature<\/p><\/li><li><p>Fluid entering temperature<\/p><\/li><li><p>Required fluid leaving temperature<\/p><\/li><li><p>Fluid flow rate<\/p><\/li><li><p>Water or glycol concentration<\/p><\/li><li><p>Airflow through the coil<\/p><\/li><li><p>Fan speed<\/p><\/li><li><p>Site altitude<\/p><\/li><li><p>Coil fouling<\/p><\/li><li><p>Air recirculation<\/p><\/li><li><p>Number of operating fans<\/p><\/li><\/ul><p>Therefore, a quotation stating only \u201c1MW dry cooler\u201d is incomplete.<\/p><p>A technically useful selection should read more like this:<\/p><blockquote><p>The dry cooler rejects 1,080kW at 35\u00b0C outdoor dry-bulb temperature, cooling the specified fluid from 48\u00b0C to 40\u00b0C at the calculated flow rate and selected fan operating condition.<\/p><\/blockquote><p>Without those conditions, two suppliers can both quote a 1MW system while offering very different real-world performance.<\/p><p><strong>Buy the operating point, not the megawatt label.<\/strong><\/p><h2>2. Start with the Heat Entering the Liquid Loop<\/h2><p>Dry cooler sizing should begin with the maximum heat that must be transferred into the outdoor air.<\/p><p>The first calculation is the ASIC IT load:<\/p><p><strong>IT Load (kW) = Miner Quantity \u00d7 Maximum Miner Input Power (kW)<\/strong><\/p><p>If several miner models are used:<\/p><p><strong>IT Load = Sum of Each Miner Quantity \u00d7 Its Maximum Input Power<\/strong><\/p><p>Use the maximum continuous input power expected under the selected operating mode. Do not calculate from average power if the miners may operate in high-performance or overclocked modes.<\/p><p>Next, determine how much of that load actually enters the liquid loop.<\/p><p>For a fully hydro-cooled miner, most of the miner heat may be captured by the coolant. However, power supplies, electrical cabinets, network devices and auxiliary equipment may still release some heat into the air.<\/p><p>A preliminary model can be written as:<\/p><p><strong>Liquid Heat Load = IT Load \u00d7 Confirmed Liquid Capture Ratio + Heat Added to the Loop by Pumps and Other Equipment<\/strong><\/p><p>The design duty is then:<\/p><p><strong>Design Heat Rejection = Liquid Heat Load \u00d7 Design Factor<\/strong><\/p><p>The design factor should cover named uncertainties such as future expansion, operating variation, heat-exchanger performance, fouling and measurement tolerance. It should not be an arbitrary percentage added to every project.<\/p><h3>Pro Tip<\/h3><p>Ask the miner and CDU suppliers to confirm the heat entering each cooling loop. \u201c1MW electrical load\u201d and \u201c1MW liquid heat load\u201d are often treated as identical during sales discussions, but they may not be identical at the equipment boundary.<\/p><h2>3. IT Load Facility Power and Heat Rejection Are Different Numbers<\/h2><p>These three values are related, but they should not be used interchangeably.<\/p><h3>IT Load<\/h3><p>This is the electrical power consumed by the miners and associated IT equipment.<\/p><h3>Facility Power<\/h3><p>This includes IT power plus pumps, fans, controls, lighting, network equipment, ventilation and electrical losses.<\/p><p>When PUE is used:<\/p><p><strong>Facility Power = IT Load \u00d7 PUE<\/strong><\/p><p>For example:<\/p><ul data-spread=\"false\"><li><p>IT load: 1,000kW<\/p><\/li><li><p>Design PUE: 1.08<\/p><\/li><li><p>Total facility demand: 1,080kW<\/p><\/li><\/ul><p>However, that does not automatically mean the dry cooler must reject exactly 1,080kW.<\/p><p>Some facility losses may be released outside the liquid loop. Transformer losses, cabinet heat and ventilation loads may be rejected separately. At the same time, pump energy that enters the coolant can increase the liquid heat-rejection requirement.<\/p><p>The thermal balance should identify where each kilowatt becomes heat.<\/p><p><strong>Do not size the dry cooler directly from the utility meter.<\/strong><\/p><h2>4. The CDU and Dry Cooler Must Be Rated at the Same Conditions<\/h2><p>The CDU is the thermal and hydraulic bridge between the miner cooling loop and the facility heat-rejection loop.<\/p><p>A liquid-to-liquid CDU normally performs four jobs:<\/p><ul data-spread=\"false\"><li><p>Transfers heat through a heat exchanger<\/p><\/li><li><p>Circulates coolant through the technology loop<\/p><\/li><li><p>Controls supply temperature<\/p><\/li><li><p>Maintains the required flow and pressure<\/p><\/li><\/ul><p>A CDU advertised as 1MW does not necessarily transfer 1MW under every temperature condition.<\/p><p>Its capacity depends on:<\/p><ul data-spread=\"false\"><li><p>Primary-loop supply and return temperatures<\/p><\/li><li><p>Secondary-loop supply and return temperatures<\/p><\/li><li><p>Flow rate on both sides<\/p><\/li><li><p>Heat-exchanger effectiveness<\/p><\/li><li><p>Fluid properties<\/p><\/li><li><p>Pressure drop<\/p><\/li><li><p>Pump operating point<\/p><\/li><\/ul><p>If the dry cooler returns warmer fluid than expected, the temperature difference across the CDU heat exchanger becomes smaller. The CDU may then be unable to maintain the required coolant supply temperature even though its nominal rating matches the IT load.<\/p><p>This creates a common engineering mismatch:<\/p><ul data-spread=\"false\"><li><p>Dry cooler selected at 25\u00b0C ambient<\/p><\/li><li><p>CDU rated using colder facility water<\/p><\/li><li><p>Project site reaches 40\u00b0C<\/p><\/li><li><p>Actual facility-water temperature rises<\/p><\/li><li><p>CDU heat-transfer capacity falls<\/p><\/li><li><p>Miner inlet temperature exceeds the target<\/p><\/li><\/ul><p>The dry cooler and CDU must therefore be selected as one connected system.<\/p><h2>5. Understand Range and Approach Temperature<\/h2><p>Two temperatures control much of the dry cooler capacity calculation: <strong>range<\/strong> and <strong>approach<\/strong>.<\/p><h3>Fluid Range<\/h3><p>The range is the temperature difference between the hot fluid entering the dry cooler and the cooled fluid leaving it.<\/p><p><strong>Range = Dry Cooler Entering Fluid Temperature \u2212 Leaving Fluid Temperature<\/strong><\/p><p>Example:<\/p><ul data-spread=\"false\"><li><p>Entering fluid: 48\u00b0C<\/p><\/li><li><p>Leaving fluid: 40\u00b0C<\/p><\/li><li><p>Range: 8\u00b0C<\/p><\/li><\/ul><p>A wider range reduces the flow required for the same heat load. However, the CDU and miners must accept the corresponding temperatures.<\/p><h3>Approach Temperature<\/h3><p>For a dry cooler, approach is commonly defined as the difference between the cooled fluid leaving the dry cooler and the outdoor entering-air dry-bulb temperature.<\/p><p><strong>Approach = Leaving Fluid Temperature \u2212 Outdoor Dry-Bulb Temperature<\/strong><\/p><p>Example:<\/p><ul data-spread=\"false\"><li><p>Outdoor dry bulb: 35\u00b0C<\/p><\/li><li><p>Dry cooler leaving fluid: 40\u00b0C<\/p><\/li><li><p>Approach: 5\u00b0C<\/p><\/li><\/ul><p>A smaller approach is harder and more expensive to achieve. It normally requires more coil surface, more airflow, higher fan power or a larger physical footprint.<\/p><p>A dry cooler operating in dry mode cannot produce leaving fluid below the outdoor dry-bulb temperature. Adiabatic assistance may temporarily improve performance by pre-cooling the entering air, but it introduces water use, water-quality requirements and additional maintenance.<\/p><h3>Pro Tip<\/h3><p>Do not write \u201c5\u00b0C approach\u201d in an RFQ without defining the two temperatures used. Suppliers sometimes use different temperature references. State the outdoor design dry bulb and required dry cooler leaving-fluid temperature separately.<\/p><h2>6. Ambient Temperature Can Remove Capacity When You Need It Most<\/h2><p>Dry cooler performance should be evaluated at the project site\u2019s design summer condition.<\/p><p>The site survey should include:<\/p><ul data-spread=\"false\"><li><p>Maximum design dry-bulb temperature<\/p><\/li><li><p>Daily temperature range<\/p><\/li><li><p>Duration of high-temperature periods<\/p><\/li><li><p>Altitude<\/p><\/li><li><p>Solar exposure<\/p><\/li><li><p>Dust and sand<\/p><\/li><li><p>Prevailing wind<\/p><\/li><li><p>Space between multiple dry coolers<\/p><\/li><li><p>Nearby walls or containers<\/p><\/li><li><p>Hot-air recirculation risk<\/p><\/li><\/ul><p>Selecting a unit from annual average temperature is a serious mistake.<\/p><p>A mining site may have an annual average of 22\u00b0C while still experiencing several weeks above 38\u00b0C. Those weeks determine whether the farm can remain at full hashrate.<\/p><p>Altitude also matters. Lower air density reduces the mass of air moved through the coil for a given volumetric airflow. The manufacturer should apply the appropriate altitude correction to the coil and fan selection.<\/p><p>Layout can create another hidden derating factor. If hot discharge air returns to the dry cooler intake, the unit may experience a much higher entering-air temperature than the weather station reports.<\/p><p>Design for the air entering the coil, not the temperature shown on a phone.<\/p><h2>7. Calculate the Required Dry Cooler Flow Rate<\/h2><p>The basic heat-transfer relationship is:<\/p><p><strong>Q = \u03c1 \u00d7 V\u0307 \u00d7 Cp \u00d7 \u0394T<\/strong><\/p><p>Where:<\/p><ul data-spread=\"false\"><li><p>Q = Heat load in kW<\/p><\/li><li><p>\u03c1 = Fluid density in kg\/m\u00b3<\/p><\/li><li><p>V\u0307 = Volumetric flow in m\u00b3\/s<\/p><\/li><li><p>Cp = Specific heat capacity in kJ\/kg\u00b7K<\/p><\/li><li><p>\u0394T = Fluid temperature difference in K or \u00b0C<\/p><\/li><\/ul><p>For water near typical mining-farm operating temperatures, a useful preliminary formula is:<\/p><p><strong>Flow (m\u00b3\/h) \u2248 Q (kW) \u00f7 [1.163 \u00d7 \u0394T (\u00b0C)]<\/strong><\/p><h3>Preliminary Water-Flow Examples for a 1MW Heat Load<\/h3><table><tbody><tr><th>Fluid Range<\/th><th>Approximate Flow<\/th><\/tr><tr><td>5\u00b0C<\/td><td>172m\u00b3\/h<\/td><\/tr><tr><td>8\u00b0C<\/td><td>107m\u00b3\/h<\/td><\/tr><tr><td>10\u00b0C<\/td><td>86m\u00b3\/h<\/td><\/tr><\/tbody><\/table><p>These figures apply to water as a preliminary calculation.<\/p><p>If glycol is used, the density, specific heat and viscosity change. A glycol mixture may require a different flow rate, produce a higher pressure drop and reduce coil heat-transfer performance.<\/p><p>The final dry cooler selection must use the actual fluid and concentration.<\/p><h2>8. Flow Rate Does Not Select the Pump by Itself<\/h2><p>A pump must deliver the required flow at the total system pressure drop.<\/p><p>For a closed cooling loop, operating pump head mainly covers:<\/p><ul data-spread=\"false\"><li><p>Straight-pipe friction<\/p><\/li><li><p>Elbows and fittings<\/p><\/li><li><p>Valves<\/p><\/li><li><p>Filters and strainers<\/p><\/li><li><p>Dry cooler coil pressure drop<\/p><\/li><li><p>CDU heat-exchanger pressure drop<\/p><\/li><li><p>Manifolds<\/p><\/li><li><p>Flow-control devices<\/p><\/li><li><p>Available fouling allowance<\/p><\/li><\/ul><p>The total vertical height should not simply be added as continuous static head in a completely closed loop because the rising and falling fluid columns largely balance during operation. Elevation still affects filling, system pressure, expansion control and component pressure ratings.<\/p><p>Pipe diameter directly changes the pump requirement.<\/p><p>A smaller pipe may reduce initial material cost, but it increases velocity, friction loss and pump energy. A larger pipe reduces pressure drop but increases pipe cost, coolant volume, insulation and installation space.<\/p><p>The correct diameter balances:<\/p><ul data-spread=\"false\"><li><p>Acceptable fluid velocity<\/p><\/li><li><p>Friction loss<\/p><\/li><li><p>Pump efficiency<\/p><\/li><li><p>Noise and vibration<\/p><\/li><li><p>Erosion risk<\/p><\/li><li><p>Valve and fitting cost<\/p><\/li><li><p>Future expansion<\/p><\/li><li><p>Coolant viscosity at the minimum site temperature<\/p><\/li><\/ul><h3>Pro Tip<\/h3><p>Request a complete system curve instead of accepting a pump selected only by maximum flow. The operating point must remain within an efficient region of the pump curve with clean filters, dirty filters and the planned valve positions.<\/p><h2>9. Fan Quantity Is Not the Same as Fan Redundancy<\/h2><p>Dry coolers often use several axial fans, but a high fan count does not automatically create an N+1 system.<\/p><p>If one fan stops:<\/p><ul data-spread=\"false\"><li><p>Airflow may become uneven across the coil<\/p><\/li><li><p>Capacity loss may be greater than the failed fan\u2019s percentage<\/p><\/li><li><p>Adjacent fans may pull air through the inactive fan opening<\/p><\/li><li><p>Remaining fans may need to operate at higher speed<\/p><\/li><li><p>Noise and fan energy may increase<\/p><\/li><li><p>The dry cooler may no longer meet full load at design ambient<\/p><\/li><\/ul><p>Ask the supplier to provide performance for:<\/p><ul data-spread=\"false\"><li><p>All fans operating<\/p><\/li><li><p>One fan unavailable<\/p><\/li><li><p>Reduced fan speed<\/p><\/li><li><p>Maximum design ambient<\/p><\/li><li><p>Actual glycol concentration<\/p><\/li><li><p>Expected coil fouling condition<\/p><\/li><\/ul><p>EC fans or variable-frequency control can reduce power consumption during cooler weather and part-load operation. They also allow staged control, but controls do not replace physical heat-transfer capacity.<\/p><p><strong>Fan redundancy protects airflow. It does not automatically protect the coil, pump, controller or power supply.<\/strong><\/p><h2>10. N+1 and Modular Deployment Logic<\/h2><p>N+1 means the system can meet the required design load after one defined module becomes unavailable.<\/p><p>The failure unit must be clearly identified.<\/p><p>It could mean:<\/p><ul data-spread=\"false\"><li><p>One fan<\/p><\/li><li><p>One pump<\/p><\/li><li><p>One CDU<\/p><\/li><li><p>One dry cooler module<\/p><\/li><li><p>One electrical feeder<\/p><\/li><li><p>One complete cooling block<\/p><\/li><\/ul><p>These are not equivalent.<\/p><p>For a modular mining farm, a practical architecture may pair each mining-container group with a CDU and dry cooler block. Additional blocks can then be added as the project expands.<\/p><p>This approach offers several advantages:<\/p><ul data-spread=\"false\"><li><p>Staged CAPEX<\/p><\/li><li><p>Easier commissioning<\/p><\/li><li><p>Smaller failure zones<\/p><\/li><li><p>Maintenance without shutting down the entire site<\/p><\/li><li><p>Clearer matching between mining load and cooling capacity<\/p><\/li><li><p>Simpler future expansion<\/p><\/li><\/ul><p>For true N+1 protection, the remaining modules must reject the full design heat load at the maximum design ambient temperature.<\/p><h3>Pro Tip<\/h3><p>Do not accept \u201cN+1 fans\u201d as proof that the cooling system is N+1. Ask what happens if an entire dry cooler circuit, CDU controller, pump skid or power feeder becomes unavailable.<\/p><h2>11. A Practical 1MW Dry Cooler and CDU Sizing Example<\/h2><p>Consider a preliminary 1MW liquid cooling mining farm.<\/p><h3>Project Inputs<\/h3><ul data-spread=\"false\"><li><p>Maximum IT load: 1,000kW<\/p><\/li><li><p>Preliminary design heat rejection: 1,080kW<\/p><\/li><li><p>Outdoor design dry bulb: 35\u00b0C<\/p><\/li><li><p>Dry cooler entering fluid: 48\u00b0C<\/p><\/li><li><p>Dry cooler leaving fluid: 40\u00b0C<\/p><\/li><li><p>Fluid range: 8\u00b0C<\/p><\/li><li><p>Approach temperature: 5\u00b0C<\/p><\/li><li><p>Facility-loop fluid: Water<\/p><\/li><li><p>Site expansion: Not included<\/p><\/li><\/ul><p>The 1,080kW value is an example that includes confirmed loop heat and an engineering allowance. It is not a universal multiplier for every 1MW project.<\/p><h3>Step 1: Calculate the Facility-Loop Flow<\/h3><p><strong>Flow = 1,080 \u00f7 (1.163 \u00d7 8)<\/strong><\/p><p><strong>Flow \u2248 116m\u00b3\/h<\/strong><\/p><p>The preliminary facility-loop flow is therefore approximately 116m\u00b3\/h.<\/p><h3>Step 2: Select the CDU<\/h3><p>The CDU must transfer at least 1,080kW at the specified primary- and secondary-loop temperatures.<\/p><p>The CDU selection must also confirm:<\/p><ul data-spread=\"false\"><li><p>Primary-side flow and pressure drop<\/p><\/li><li><p>Secondary-side flow and pressure drop<\/p><\/li><li><p>Miner supply-temperature setpoint<\/p><\/li><li><p>Heat-exchanger performance<\/p><\/li><li><p>Pump curve<\/p><\/li><li><p>Filtration<\/p><\/li><li><p>Expansion control<\/p><\/li><li><p>Leak detection<\/p><\/li><li><p>Water-quality requirements<\/p><\/li><li><p>Pump and control redundancy<\/p><\/li><\/ul><p>A CDU with a catalog rating above 1,080kW may still be unsuitable if that rating was measured with colder facility water or a larger temperature difference.<\/p><h3>Step 3: Select the Dry Cooler<\/h3><p>The dry cooler bank must reject at least 1,080kW under all specified conditions:<\/p><ul data-spread=\"false\"><li><p>35\u00b0C entering dry-bulb temperature<\/p><\/li><li><p>48\u00b0C entering fluid<\/p><\/li><li><p>40\u00b0C leaving fluid<\/p><\/li><li><p>Approximately 116m\u00b3\/h water flow<\/p><\/li><li><p>Project altitude<\/p><\/li><li><p>Selected fan speed<\/p><\/li><li><p>Required sound limit<\/p><\/li><li><p>Defined fouling condition<\/p><\/li><\/ul><p>If glycol is required for freeze protection, the manufacturer must rerun the selection.<\/p><h3>Step 4: Choose the Redundancy Strategy<\/h3><p><strong>CAPEX-focused configuration<\/strong><\/p><p>One CDU and one dry cooler bank serve the entire load. This has the lowest equipment cost, but maintenance or a major failure can require project derating or shutdown.<\/p><p><strong>Modular derating configuration<\/strong><\/p><p>Two cooling blocks share the load. If one block stops, the farm intentionally reduces the operating miner count. This is not full N+1, but it limits the outage area.<\/p><p><strong>Full N+1 configuration<\/strong><\/p><p>Use enough CDU and dry cooler modules so the remaining modules can transfer and reject the full 1,080kW after one module fails.<\/p><p>For example, three equal modules would each need to provide at least 540kW at the stated operating conditions because any two modules must carry 1,080kW.<\/p><p>Commercial module sizes, hydraulic balancing and control logic must be verified during final selection.<\/p><h2>12. What Happens When the Dry Cooler Is Too Small?<\/h2><p>An undersized dry cooler rarely fails with one dramatic event. The problem usually develops as a thermal chain reaction.<\/p><ol start=\"1\" data-spread=\"false\"><li><p>Outdoor temperature rises.<\/p><\/li><li><p>Dry cooler leaving-fluid temperature increases.<\/p><\/li><li><p>Warmer fluid reaches the CDU.<\/p><\/li><li><p>CDU temperature difference decreases.<\/p><\/li><li><p>Secondary coolant supply temperature rises.<\/p><\/li><li><p>Miner chip temperatures increase.<\/p><\/li><li><p>Miners reduce performance, alarm or shut down.<\/p><\/li><li><p>The project loses hashrate during the most difficult operating hours.<\/p><\/li><\/ol><p>The operational consequences can include:<\/p><ul data-spread=\"false\"><li><p>Thermal derating<\/p><\/li><li><p>Miner shutdowns<\/p><\/li><li><p>Repeated alarms<\/p><\/li><li><p>Higher fan and pump power<\/p><\/li><li><p>Reduced overclocking capability<\/p><\/li><li><p>Thermal cycling<\/p><\/li><li><p>Increased maintenance<\/p><\/li><li><p>Emergency water or chiller rental<\/p><\/li><li><p>Lost mining revenue<\/p><\/li><li><p>Expansion capacity that cannot be used<\/p><\/li><\/ul><p>The cost of insufficient cooling should be included in the ROI model:<\/p><p><strong>Downtime Cost = Offline Miner Quantity \u00d7 Expected Gross Margin per Miner per Day \u00d7 Outage Duration<\/strong><\/p><p>The result changes with cryptocurrency price, network difficulty, miner efficiency and electricity price. That is exactly why thermal capacity should be treated as revenue protection rather than a simple equipment purchase.<\/p><h2>13. Dry Cooler RFQ Checklist<\/h2><p>Before requesting a dry cooler and CDU quotation, prepare the following information.<\/p><h3>Mining Load<\/h3><ul data-spread=\"false\"><li><p>Miner brand and exact model<\/p><\/li><li><p>Miner quantity<\/p><\/li><li><p>Maximum power per miner<\/p><\/li><li><p>Total IT load<\/p><\/li><li><p>Liquid heat-capture ratio<\/p><\/li><li><p>Planned overclocking<\/p><\/li><li><p>Future expansion load<\/p><\/li><\/ul><h3>Site Conditions<\/h3><ul data-spread=\"false\"><li><p>Project country and location<\/p><\/li><li><p>Maximum design dry-bulb temperature<\/p><\/li><li><p>Minimum winter temperature<\/p><\/li><li><p>Altitude<\/p><\/li><li><p>Humidity<\/p><\/li><li><p>Dust and sand exposure<\/p><\/li><li><p>Available installation area<\/p><\/li><li><p>Sound restrictions<\/p><\/li><li><p>Air-discharge direction<\/p><\/li><\/ul><h3>Thermal Conditions<\/h3><ul data-spread=\"false\"><li><p>Required miner coolant supply temperature<\/p><\/li><li><p>Miner return temperature<\/p><\/li><li><p>CDU primary-loop temperatures<\/p><\/li><li><p>CDU secondary-loop temperatures<\/p><\/li><li><p>Dry cooler entering-fluid temperature<\/p><\/li><li><p>Dry cooler leaving-fluid temperature<\/p><\/li><li><p>Required approach<\/p><\/li><li><p>Required fluid range<\/p><\/li><\/ul><h3>Hydraulic Conditions<\/h3><ul data-spread=\"false\"><li><p>Coolant type<\/p><\/li><li><p>Glycol concentration<\/p><\/li><li><p>Required flow<\/p><\/li><li><p>Pipe length<\/p><\/li><li><p>Pipe material<\/p><\/li><li><p>Estimated fittings and valves<\/p><\/li><li><p>Elevation difference<\/p><\/li><li><p>Filter pressure drop<\/p><\/li><li><p>CDU pressure drop<\/p><\/li><li><p>Dry cooler coil pressure drop<\/p><\/li><\/ul><h3>Reliability Requirements<\/h3><ul data-spread=\"false\"><li><p>Acceptable miner derating after one failure<\/p><\/li><li><p>Pump redundancy<\/p><\/li><li><p>Fan redundancy<\/p><\/li><li><p>CDU redundancy<\/p><\/li><li><p>Dry cooler module redundancy<\/p><\/li><li><p>Dual-power requirement<\/p><\/li><li><p>Remote monitoring protocol<\/p><\/li><li><p>Required spare parts<\/p><\/li><\/ul><p>One complete design-condition sheet is more valuable than ten quotations labeled \u201c1MW.\u201d<\/p><h2>Final Verdict: Size the Thermal Chain as One System<\/h2><p>Dry cooler sizing is not a product-selection exercise. It is a system-balance exercise.<\/p><p>The correct sequence is:<\/p><p><strong>Maximum miner load \u2192 Liquid heat load \u2192 CDU operating point \u2192 Fluid temperatures \u2192 Flow rate \u2192 System pressure drop \u2192 Dry cooler capacity \u2192 Redundancy<\/strong><\/p><p>For a 1MW project, the dry cooler may need more than 1MW of nominal catalog capacity. The actual answer depends on the site ambient temperature, required approach, fluid range, coolant type, CDU performance and failure strategy.<\/p><p>Go modular when uptime and expansion matter.<\/p><p>Use one large cooling block only when the project can accept the maintenance and failure risk.<\/p><p>Most importantly, require every supplier to state capacity at the same operating conditions. That is the only way to compare quotations honestly.<\/p><p>To understand when dry cooling is a better choice than evaporative heat rejection, read <a href=\"https:\/\/drolin-box.com\/en\/dry-cooler-for-data-center-liquid-cooling\/\">Dry Cooler for Data Center Liquid Cooling<\/a>.<\/p><p>For CDU selection logic, review <a href=\"https:\/\/drolin-box.com\/en\/cdu-for-ai-data-center-mining-to-hpc\/\">CDU for AI Data Centers<\/a> and the <a href=\"https:\/\/drolin-box.com\/en\/product\/cdu\/\">DroLinBox CDU Product Page<\/a>.<\/p><p>For preliminary project sizing, submit your miner model, quantity, project location, power capacity, design temperatures and site layout through the <a href=\"https:\/\/drolin-box.com\/en\/contact\/\">DroLinBox Contact Page<\/a>.<\/p><h2>FAQ<\/h2><h4>How much dry cooler capacity is required for a 1MW mining farm?<\/h4><p>Do not select the dry cooler from the 1MW IT rating alone. Calculate the heat entering the liquid loop, pump heat, design allowance, ambient temperature, fluid temperatures and redundancy requirement. A 1MW IT project may require a dry cooler selection above 1MW at the project\u2019s actual design conditions.<\/p><h4>How is dry cooler capacity calculated?<\/h4><p>The basic relationship is Q = \u03c1 \u00d7 V\u0307 \u00d7 Cp \u00d7 \u0394T. Final selection also requires the outdoor dry-bulb temperature, approach temperature, fluid type, coil performance, airflow, altitude and fan operating condition.<\/p><h4>What flow rate is required for a 1MW dry cooler?<\/h4><p>For water, approximately 172m\u00b3\/h is required at a 5\u00b0C range, 107m\u00b3\/h at an 8\u00b0C range and 86m\u00b3\/h at a 10\u00b0C range. Glycol mixtures require recalculation using their actual properties.<\/p><h4>Can a dry cooler cool water below ambient temperature?<\/h4><p>A standard dry cooler operating in dry mode cannot cool the leaving fluid below the entering-air dry-bulb temperature. Adiabatic assistance or mechanical refrigeration is required when lower temperatures are needed.<\/p><h4>Should the dry cooler be larger than the CDU?<\/h4><p>Neither component should be selected from nominal capacity alone. The CDU and dry cooler should both meet the project heat load at the same fluid temperatures, flow rates and design ambient condition. Redundancy may require additional installed capacity.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A 1MW mining farm can still overwhelm a dry cooler labeled \u201c1MW.\u201d The label may be technically correct at a 25\u00b0C ambient temperature, a generous fluid temperature, clean coils, full fan speed and pure water. Move that same unit to a 40\u00b0C mining site, demand colder coolant, add glycol and allow dust to build on [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5915,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,28],"tags":[],"class_list":["post-5914","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-news"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dry Cooler Sizing for Liquid Cooling Mining Farms<\/title>\n<meta name=\"description\" content=\"Learn dry cooler sizing for liquid cooling mining farms, including heat load, CDU matching, flow rate, approach temperature and N+1 redundancy.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/drolin-box.com\/kk\/dry-cooler-sizing-liquid-cooling-mining-farms\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimizing Global Crypto Infrastructure: Next-Gen Mining Containers by DroLin Box\" \/>\n<meta property=\"og:description\" content=\"Discover why leading mining operations choose DroLin Box for reliable, high-efficiency infrastructure. 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