Technical Data Sheet · Heat Pump Dryer
SE-AA-DR Series · Air Source Dryer
SE-AA-DR-50
Closed-loop heat pump dryer module. Takes the water out of the drying air as liquid and puts the heat back into the same air — 60 L/h of moisture removal at up to 70 °C. R134a circuit, three-phase.
Moisture removal
60L/h
Dehumidifying capacity, rated
Heating capacity
50kW
Delivered to the drying air
Drying air
70°C
Rated · 75 °C maximum
Input power
21.8kW
Rated
Drying efficiency
What a kilowatt-hour of electricity does in this machineWater per kWhderived
- Moisture removal
- 60L/h
- Input power
- 21.8kW
- Water removed per kWh
- 2.75kg
Heating COPderived
- Heating capacity
- 50kW
- Input power
- 21.8kW
- COP
- 2.29
Resistance heaterphysics limit
- Heat to evaporate 1 kg
- 0.68kWh
- Best possible per kWh
- ≤ 1.47kg
Technical specifications
SE-AA-DR-50| Parameter | Unit | Specification |
|---|---|---|
| Performance | ||
| Heating capacity | kW | 50 |
| Cooling capacity | kW | 40 |
| Dehumidifying capacity | L/h | 60 |
| Input power | kW | 21.8 |
| Rated drying temperature | °C | 70 |
| Maximum drying temperature | °C | 75 |
| Electrical supply | ||
| Power supply | — | 380–415 V / 50Hz / 3 Ph |
| Rated current | A | 44 |
| Refrigeration circuit | ||
| Refrigerant | — | R134a |
| Refrigerant charge | kg | 9 |
| Air circuit | — | Closed loop, recirculating |
| Working ambient range | °C | −5 to 43 |
| Unit | ||
| Dimensions (L × W × H) | mm | 2142 × 1598 × 1773 |
| Net weight | kg | not yet published |
Rated figures
- Capacities, input power and current are Sunniva’s rated figures. The specification does not name the chamber air condition they were measured at, so they are published as rated values, not against a test condition.
- Derived figures are worked out from the rated ones and say so. Evaporating 1 kg of water takes about 2,450 kJ — 0.68 kWh — which is where the resistance-heater limit comes from.
Installation requirement
- Dedicated supply on its own protective device, sized by a licensed electrician for the rated current above, with earthing.
- Condensate outlet piped to a drain with a trap — the unit gives up to 60 L of water an hour.
- Connect to an insulated, air-tight drying chamber; the air circuit is closed and is not vented outside.
How the closed loop works
The same air goes round and round — only the water leavesHot, dry airWarm, moist airRefrigerant circuitWater taken out
- 1Hot, dry air in. The module blows air at up to the rated temperature across the trays.
- 2Moisture picked up. The air takes water out of the product, cooling and getting wetter as it crosses the chamber.
- 3Water condensed out. Back in the module the moist air crosses the evaporator, is cooled below its dew point, and the water runs to drain as liquid.
- 4Heat put back. The heat taken out on the evaporator, plus the compressor's work, goes back into the same air on the condenser. Nothing is vented, so the heat is not lost.
Schematic — not to scale, and not a general arrangement. Tray layout, air direction and duct position depend on the chamber.
Choosing a model
Size on the water to be removed, not on the weight of productWater to remove = wet weight × (Min − Mout) ÷ (1 − Mout)M = moisture content, wet basis, as a fraction
Worked example · SE-AA-DR-50
| Product | Fresh produce, 80 % moisture → 10 % |
| Water given up | 77.8 kg per 100 kg loaded |
| This model, rated | 60 L/h |
| Fresh product per hour | ≈ 77 kg An upper bound at the rated rate. The last stage of drying is slower, and many products are dried cooler than 70 °C. |
What decides the size
| The water, per hour | Water to remove ÷ the drying time you can accept |
| Product temperature | Heat-sensitive products dry cooler and slower; allow for it |
| The chamber | Volume, tray area and air path matched with Sunniva The module’s air flow is not yet published. |
| The supply | Only SE-AA-DR-11 has a single-phase variant |
For a first estimate on your own figures, use the dryer calculator — it lists over 130 products with typical moisture figures.
The range at a glance
SE-AA-DR-50 is marked| Model | Moisture L/h | Heating kW | Input kW | kg / kWh* | Supply | L × W × H mm |
|---|---|---|---|---|---|---|
| SE-AA-DR-11 (1-ph) | 12 | 10.5 | 5.5 | 2.18 | 1-ph · 25 A | 1650 × 856 × 1280 |
| SE-AA-DR-11 (3-ph) | 12 | 10.5 | 5.5 | 2.18 | 3-ph · 11 A | 1650 × 856 × 1280 |
| SE-AA-DR-21 | 25 | 21 | 9.5 | 2.63 | 3-ph · 19 A | 1806 × 1178 × 1662 |
| SE-AA-DR-42 | 50 | 42 | 19.4 | 2.58 | 3-ph · 39 A | 2142 × 1598 × 1773 |
| SE-AA-DR-50 | 60 | 50 | 21.8 | 2.75 | 3-ph · 44 A | 2142 × 1598 × 1773 |
| SE-AA-DR-84 | 100 | 84 | 40 | 2.50 | 3-ph · 80 A | 2142 × 1598 × 1773 |
| SE-AA-DR-100 | 120 | 100 | 43.6 | 2.75 | 3-ph · 88 A | 2142 × 1598 × 1773 |
* Water removed per kWh of electricity, derived from the rated dehumidifying capacity and input power.
Installation steps
Follow in order — commission before the first batch- Agree the chamber first. Size, insulation, door, tray layout and the duct openings are matched to the module before anything is ordered.
- Plinth. Stand the module level on a firm plinth beside the chamber, close to the duct openings so the air path stays short.
- Air connections. Connect supply and return to the chamber with insulated, sealed ducting. Any leak lets outside air into a closed loop.
- Condensate. Run the drain with a trap and a steady fall to an open drain. At full duty it carries the rated L/h of water.
- Electrical. Dedicated supply and protective device sized for the rated current; earth bonded; cable sized by a licensed electrician.
- Clearances. Keep the module’s grilles and service panels clear for air and for access to the compressor and coils.
- Commission. Check refrigerant pressures, set the drying temperature for the product, confirm water is reaching the drain.
- First batch. Weigh the product in and out and log the time — it is the quickest way to confirm the selection on your product.
Chamber & site checklist
What has to be true before the module arrivesChamber & site
| Chamber | Insulated walls, roof and floor; door gasketed; no openings to outside air other than the ducts |
| Product | Spread in an even layer on trays so the air reaches every piece |
| Location | Dry, ventilated plant area; module protected from standing water and direct rain |
| Ambient | −5 to 43 °C working ambient, as rated |
| Drain | Within reach of the module, below the condensate outlet |
| Power | 3-phase 44 A rated |
Not yet published for this model
- Net weight of the module
- Air flow and available fan pressure
- Sound pressure level
- The chamber air condition the ratings were measured at
- Ask Sunniva for any of these before finalising a chamber design. They are left blank here rather than estimated.
Documents & links
Scan with a phone camera, or tap the buttons
Documentation
Scan to open the latest revision on sunnivaencon.com
Connect & review
Product videos and customer feedback
SE-AA-DR-50 · Technical Data Sheet. Specifications are subject to change without prior notice. ← All Heat Pump Dryer models