How Do Six 20-Unit Cabinets Form a 120-Miner Cooling Array?
When you scale from one test miner to 120 production units, the racking changes completely. You are not stacking shelves. You are building a parallel liquid distribution network. Each cabinet is a manifold that must deliver equal flow to every miner. If one cabinet has a pressure drop, the miners inside it will overheat while others run cold.
Each 20-unit hydro cooling cabinet measures 1010mm by 800mm by 2085mm. It weighs 235KG dry but reaches 875KG when full of coolant and M73 miners. Six of these cabinets link together to house 120 miners. The total operating weight of the cabinet array is over 5 metric tons.
Why Cabinet Flow Rate Matters for 120 Units
The plumbing inside these cabinets is not generic. It is sized for the exact flow requirements of the M73 water block. Here is what makes these Miner Source cabinets different from a standard server rack.
- Uniform Distribution: Internal manifolds are engineered to provide a 12m³/h flow rate through the cabinet loop. With six cabinets running in parallel, the central pump must deliver 72m³/h to the entire array.
- Structural Integrity: Each cabinet supports 20 units of 2U liquid-cooled servers. The rails do not flex under the weight of the water inside the pipes and blocks. Flexing leads to leaks. Leaks lead to downtime.
- Electrical Design: Each cabinet includes a PDU with ten 40A breakers. Each breaker controls two miners. The total power capacity per cabinet is 200KW.
Cabinet Technical Specifications Table
These are the verified specs for the Miner Source 20-unit hydro cabinet.
| Specification Category | Parameter | Value |
|---|---|---|
| Dimensions | Length x Width x Height | 1010 x 800 x 2085 mm |
| Capacity | Number of Miners | 20 x Whatsminer M73 (2U Hydro) |
| Dry Weight | Shipping Weight | 235 KG |
| Operating Weight | Full of Coolant and Miners | 875 KG |
| Electrical Input | Voltage and Phase | 380V, 50Hz, 3-Phase |
| Thermal Capacity | Cooling at 40°C Inlet | 168 KW |
| Thermal Capacity | Cooling at 45°C Inlet | 200 KW |
| Plumbing Interface | Inlet and Outlet Connector | Φ51 x 64mm Clamp Chuck |
How Does a Central CDU Manage Coolant for 120 Miners?
With 120 miners, you cannot use six separate small pumps. That creates six different pressure zones. They will fight each other. The solution is a central Cooling Distribution Unit. This single unit pumps coolant to all six cabinets and receives the hot return water.
The Miner Source CDU used in this 120-unit system is a 1-Drag-10 configuration. It consumes 31KW of power and weighs 650KG dry. It integrates a Siemens PLC controller, variable speed pumps, and a stainless steel manifold. One CDU manages the entire 72m³/h flow requirement for the six cabinets.
The Intelligence Behind the Pump
This CDU is the brain of the cooling farm. It does more than just spin a motor. Our client in Mexico uses the remote dashboard to monitor the site from anywhere.
- Auto Pressure Balancing: The Siemens PLC reads pressure sensors on the supply and return lines. If the pressure differential drifts because of a valve adjustment or a pump issue, the VFD adjusts motor speed automatically. This prevents pipe bursts.
- Low Water Protection: The system monitors the tank level. If coolant is lost due to a leak, the CDU triggers an alarm and can be programmed to shut down the miner power supply. This saves the M73 power supplies from burning up during a dry run.
- Remote Visibility: The client sees inlet temperature, outlet temperature, and flow rate on a mobile app. They do not need to walk the floor of the warehouse.
CDU Control and Power Specifications
The unit we ship under the Miner Source brand is built for 24/7 industrial duty.
| Specification | Value | Description |
|---|---|---|
| Model Type | 1-Drag-10 | Supports up to 10 cabinet branches |
| Power Consumption | 31 KW | Includes pump and control logic |
| Weight (Dry) | 650 KG | Stainless steel frame and components |
| Control System | Siemens S7 Series | Industry standard PLC |
| Pump Type | Vertical Multistage | Variable Frequency Drive (VFD) |
| Flow Capacity | 81 m³/h | Matches the 1200KW dry cooler loop |
What Are the Specs of the 1200KW Dry Cooler That Handles 45°C Water?
You might see a 1200KW dry cooler in a photo and think it is just a big radiator. That is a mistake. At this scale, the air volume and coil design are critical. If the face velocity is wrong, the air bypasses the fins. If the fin spacing is too tight, dust clogs the coil in a week. The outdoor unit must be matched perfectly to the indoor load.
The Miner Source 1200KW dry cooler operates in a closed loop with copper tubes and aluminum fins. It takes in water at 45°C and cools it to 33.6°C when the outside air temperature is 30°C. It moves 440,000 cubic meters of air per hour using twenty 2.2KW fans.
Why This Dry Cooler Works in Dry and Hot Climates
The client in Mexico wanted a system that does not need a constant water supply. A wet cooling tower would evaporate thousands of liters per day. That water cost adds up. Plus, the water in the region is hard. It would scale up the pipes quickly. A dry cooler solves both problems.
1200KW Dry Cooler Technical Data Sheet
Below are the exact engineering specifications for the unit we manufactured for this 120-miner deployment.
| Parameter | Value | Unit |
|---|---|---|
| Cooling Capacity | 1200 | KW |
| Design Ambient Temp | 30 | °C |
| Water Inlet Temp | 45 | °C |
| Water Outlet Temp | 33.6 | °C |
| Water Flow Rate | 81 | m³/h |
| Coil Material | Copper Tube / Aluminum Fin | – |
| Fin Spacing | 1.95 | mm |
| Total Air Flow | 440,000 | m³/h |
| Number of Fans | 20 | pcs |
| Fan Motor Power | 2.2 KW per fan (44 KW Total) | KW |
| Noise Level | 70 dBA at 15 meters | – |
| Water Connections | DN125 Flange | mm |
Comparing Dry Cooler and Closed Loop Tower Performance
Here is why we almost always recommend the dry cooler for mining sites with high ambient dust or limited water.
| Factor | Miner Source Dry Cooler | Alternative Wet Tower |
|---|---|---|
| Water Usage | Zero. No makeup water required. | High evaporation rate. |
| Fluid Cleanliness | Remains pristine. Protects cold plates. | Absorbs dirt and bacteria. |
| Maintenance | Annual fin cleaning. | Weekly water treatment required. |
| Winter Risk | Manageable with glycol mix. | Fill media can freeze and collapse. |
How Does DDP Sea Freight Simplify Delivery for Large-Scale Infrastructure?
Six cabinets and a 1200KW dry cooler take up a lot of space. They require a full container load or partial breakdown on a flat rack. The logistics for heavy equipment crossing borders are complex. You have export clearance from China. You have import duties in Mexico. You have the 16% VAT to calculate. One missing form stops the whole project.
Miner Source ships this entire 120-unit cooling infrastructure under DDP (Delivered Duty Paid) terms to Mexico. We pay the ocean freight. We handle the Mexican import broker. We prepay the customs duties and the 16% IVA. The client only pays the product invoice. They do not see a customs bill or storage charge.
The Reality of Mexican Customs for Heavy Equipment
Mexico uses an automated system that can flag a shipment for a physical inspection at random. When that happens, the container is taken to a “Punto de Revision.” The inspection itself is free. But the waiting time costs money. You pay port demurrage. You pay for the container to be moved to the inspection bay. You pay for a forklift to unload the 1200KW cooler so the officer can look inside the fan housing.
Because we operate under Miner Source DDP terms, we have local agents who manage this inspection process for the client. We build the crates to be opened easily. We provide detailed packing lists in Spanish. We ensure that if the officer wants to check the copper coils, they can do so without damaging the equipment. The client stays out of the bureaucratic loop.
Conclusion
Scaling to 120 units of Whatsminer M73 is a serious commitment. The hashrate is high. The power draw is high. The heat is extreme. You need a cooling partner that understands the math of 81m³/h flow rates, 1200KW heat rejection, and the physical footprint of six industrial cabinets.
At Miner Source, we manufacture this entire system under our own brand. We control the quality of the dry cooler coil. We program the Siemens PLC in the CDU. We build the cabinets to fit the M73 water block exactly. And we take care of the heavy lift of DDP shipping to your door in Mexico, Canada, the USA, or the UAE. If you are planning a deployment and want to know the lead time on a 1200KW system, Contact MinerSource Team Purchase Now!
