HEAT PUMPS FOR HEAT RECOVERY FROM PAPER DRYERS, PRODUCING PROCESS STEAM FROM THE DRYER EXHAUST AIR
Different possibilities have been studied to produce heat at 125-145 degrees for a paper dryer from its waste heat at 80-90 C. A comparison of the possible systems was made regarding technical feasibility, energy saving potential and costs. The two-staged absorption heat pump with LiBr/H-2O was found to be able to work under the specific operating conditions of the reference paper machine. A 100 kW heat pump of this type was built and tested on a test rig. As a result of these tests the following modifications are being brought about: + Installation of a pump to control the solution and avoid crystallization of LiBr. + Continuous measurement of the LiBr concentration. + Design of a new LiBr solution distribution system. + Replacement of the solution heat exchanger by a new apparatus with low losses.
Bibliographic Reference: EUR 10553 DE (1986) MF, 121 P., BFR 300, BLOW-UP COPY BFR 605, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125042000 / Last updated on: 1987-07-01
Available languages: de