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Abstract

The objective of this report was to develop and build a prototype of a low energy washing machine, using only around 15 percent of the electricity typically consumed in 1975. Earlier analyses indicated significant potentials for saving electricity when washing clothes. Of three possible saving measures: 1) Reducing the amount of water, 2) reducing the temperature and 3) taking in hot water heated by cheaper energy sources, we focused on 1) but gave some considerations to 2). A new washing process using less water during the high temperature run and a prototype washing machine were developed and tested. In a second stage the process was further improved into a resource efficient (RE-) process which uses less detergent and less water for rinsing in addition to the energy savings. The annual electricity savings would be 140 kWh when compared to average 1982 machines and less mechanical action would be involved. Alternatively we suggest a process with an hour long pre- soaking in enzyme detergent followed by washing at lower temperature. With warm water from the hot water system, this method, not yet fully explored, would save 300 kWh per year. With this method we could reach our target.

Additional information

Authors: HEEBOELL J, TECHNICAL UNIVERSITY OF DENMARK, LYNGBY (DENMARK);NOERGANGSTROEMRD J TECHNICAL UNIVERSITY OF DENMARK, LYNGBY (DENMARK), TECHNICAL UNIVERSITY OF DENMARK, LYNGBY (DENMARK)
Bibliographic Reference: EUR 10449 EN (1986) MF, PART 3, 43 P., BFR 150, BLOW-UP COPY BFR 225, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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