ENERGY EFFICIENT LAUNDRIES
efficiently, requiring less time to heat up and with textile fibres open, the linens dry quicker. Finding a balance around wash temperature and latent heat in the textile loading being passed through to the drying stage is one way of maximising energy usage.
Steam
In traditional steam laundries with large boilers, the demand for steam is high. Although boiler sizes have in many cases now reduced, the boiler still uses energy to heat up.
Traditional steam heating is difficult to modulate efficiently so as to capitalise on energy reduction from lower wash temperatures. Christeyns however work with laundries to make maximum use of this steam by recovering flash steam and high temperature condensate which can then be efficiently redeployed to preheat water in the holistic wash cycle. Recovered steam can meet most of the energy for wash equipment.
Christeyns also offers Zero-Steam, steam-free hot water solutions for washer extractors and tunnel washers. The main benefits of this sustainable technology revolve around less energy loss through more efficient utilisation of primary energy carriers which leads to cost savings. Production capacity is increased as hot water is created independently from the wash process and there is no need to start up the steam boiler before production. The system uses efficient modulating condenser heating to deliver hot water into the wash process. This in turn works in a complete recovery system with heat exchange and heat recovery to make a near closed loop system. To complement a Zero-Steam system, Christeyns offer a range of heat exchangers that effectively transfer air-to-water heat from laundry finishing equipment. The Heat-X Air range for industrial laundries transfers free energy from
COOL CAMPLINGS: The Christeyns Heat-X Air range for industrial laundries transfers free energy from ironers to the washing process, recovering both the sensible and latent heat. The team is pictures at Camplings in the UK
ironers to the washing process, recovering both the sensible and latent heat. It’s an easy to install, plug-and-play system, complementary to existing heat exchange technologies.
Heat-X Air can reclaim up to 35% of the iron energy input and by transferring this heat to fresh water, it provides significant energy savings in the wash process. The heated fresh water is used for warm rinsing which as stated earlier increases the efficiency of the rinsing process, increasing textile temperatures and press efficiency and providing additional savings in water consumption.
Management of dryer settings Checking dryer settings is part of the holistic management service Christeyns offers. When different types of linen are dried together, the varying fibre densities cause issues. Industrial dryers use infrared or temperature sensors to set drying times by testing moisture content. This is not necessarily accurate for all the types of linens in mixed loads and can lead to
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over-drying, hard textiles and yellowing of fibres. Energy is being used unnecessarily, textiles are more damaged, and linens are drier than they should be for the ironer. In addition to innovative energy saving technology, getting the wash sortation right first time, where possible, also goes a long way towards keeping energy costs down. Essentially acting as consultants, the team work with laundries to spot and assist with routine checks and procedures. This includes monitoring the Process Gap – the amount of laundry that should be being removed prior to processing. Items that are at end of life, or unfit, waste energy and should be pulled from the laundry process by systematic checking. In addition, some items only need refinishing, for example folding errors when coming out of the ironing process, rather than complete re-washing. Reducing reprocessing and improving the first-time pass rate through the correct reclassification of the processed linens saves both time and energy.
Dryer efficiency also needs to be checked regularly. Plastic debris in the drum prevents efficient air circulation as does the build up of lint. Regular cleaning of the drum for removal of this debris promotes dryer air and exhaust heat recovery from air to water heat exchange.
CWe live in a world that is increasingly environmentally conscious and the laundry industry is under pressure to ensure it keeps up its part by reducing the negative impact it has on the environment. Meanwhile laundries have their own sustainable goals to achieve without reducing quality of output.
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