Miele Tumble Dryer PDR 922 [EL SOM] – 3 AC 230V 50/60HZ, Stainless steel

Twenty-three minutes for a full programme at up to 22 kg load is what sets the PDR 922 [EL SOM] apart in a ship’s laundry. With a 400 l drum and residual-moisture-controlled drying, it is specified to clear bulky workwear and linen quickly rather than run long low-duty cycles.

On board, that 23-minute figure translates directly into watch planning: deck and engine departments can turn around 16 kg of PPE at a 1:25 ratio or 22 kg of mixed laundry at 1:18 without tying up a machine for a full hour. The exhaust-air system removes moisture at up to 22.3 l per hour, so the room ventilation and ductwork need to be sized for that latent load. Heat dissipation into the room is quoted at 2.6 MJ/h, a number the HVAC designer can use to balance the laundry against the rest of the accommodation. The unit is specified and approved for shipboard use and explicitly specified for offshore installations, which matters on vessels and platforms under class and flag scrutiny.

Electrically, the PDR 922 [EL SOM] is a 3 AC 230V 50/60HZ machine with a total connected load of 23.5 kW and an electric heater rating of 22.5 kW. That combination gives the short programme duration and a specific energy consumption of 0.5 kWh/kg. Fuse rating is 63 A, so the distribution board and cabling can be sized from the data rather than guessed. Service life is stated at 40000 drying cycles, which for a busy offshore installation is a multi-year horizon, not a disposable asset.

Physically the dryer stands 1400 mm high, 906 mm wide and 1162 mm deep, with gross transport dimensions of 1526 × 1090 × 1254 mm. Net weight is 198.9 kg with a gross weight of 213 kg. Maximum floor load is 2275 N, a figure the naval architect will use to check deck reinforcement. The door opening is 520 mm in diameter with a 180 degree opening angle on a left hinge, making it practical to load items such as 16 respirator masks, 3 overalls, 5 over jackets, 2 synthetic duvets or 364 cloths of 22 g in a single cycle. Published examples also include 84 cotton mops at 40 cm or 133 microfibre mops at 40 cm, underlining that this is a workhorse for cleaning and maintenance teams as well as cabin linen.

Noise and waste heat into a confined space are not academic points at sea. Emission sound pressure level at the workplace is given as 62 dB(A) re 20 µPa, which keeps the laundry workable without hearing protection, and a recycling rate of 91 % will be of interest where end-of-life disposal is part of the procurement brief.

Build and control

• Specified for offshore installations
• Specified and approved for shipboard use
• Remaining cycle time display
• Communication slot for network modules
• Prepared for a payment system (self-service laundries)
• Optical service interface for diagnostics
• Can be tied into a peak-load / energy management system
• WiFi networking
• Connector Box for external systems

This dryer fits a vessel or platform that needs Benchmark-class Performance Plus controls and fast 23-minute cycles for heavy daily use, and where an exhaust-air system with up to 22.3 l/hour evaporation and 2.6 MJ/h heat dissipation can be properly ducted and cooled. It is less suitable where exhaust ducting is constrained or where the electrical board cannot comfortably supply 23.5 kW at 3 AC 230V 50/60HZ; in such cases a different capacity or heating concept should be examined. Ordered under Miele material number 11934820 and article number 52922014SOM.