Home > Energy and time-efficient drying sensor from Grimwood Heating

Energy and time-efficient drying sensor from Grimwood Heating

Supplier News
article image Relative humidity sensor

The use of the Eliwell relative humidity (RH) sensor from Grimwood Heating will save energy and time in your drying room.

Drying rooms are used extensively in industry to dry a wide range of items from coal miners clothing through to filter media and process fabrics, they are also used in places such as ski lodges to dry sporting clothing and equipment.

In drying rooms, the items are hung on lines or racks and dried by air circulation. This is the only option where commercial scale tumble dryers would damage the items, the items would damage the tumble dryer as they are just too large, or ambient weather prevents conventional outdoor drying.

The efficient way to dry fabrics in a drying room is to ensure the RH does not get high, since as the humidity in the room rises, the evaporation from the wet fabric reduces. There are two ways to reduce the RH and increase the drying (evaporation); increase the temperature, since warmer air will hold more water and to exhaust the humid air and replace it with drier ambient air.

The Grimwood solution is to do both of these things together.

The Eliwell sensor measures both the RH and temperature in the room, and the signal is processed by the pair of Eliwell controllers, so that if the RH is greater than 50%, the exhaust fans are activated and if the temperature is less than 30 C the heaters are activated.

This results in energy and time-efficient drying.

The Eliwell controllers are housed in an enclosure with single phase 240 V a service cord for simple installation. The probe is pre-wired to the controller enclosure, but can simply be extended for optimum placement.

The heating is provided by a Grimwood fan heater, allowing optimum placement and flexibility for variable drying configurations.

Installation and commissioning by the user involves:

  • Mounting the control panel and locating the sensor probe
  • Wiring the output from the humidity controller to the exhaust fan relay
  • Wiring the output from the temperature controller to the heater element relay
  • Adjusting the humidity and temperature controller set points and differentials if required
  • Adjusting the position of the sensor probe and the heater if required

Newsletter sign-up

The latest products and news delivered to your inbox