Abstract: Heat pump 10 has heat-absorbing section 12 that receives heat from an outside and heat-releasing section 13 that releases heat to the outside, for transferring heat between heat-absorbing section 12 and heat-releasing sectioning 13 by reinforcing and reducing a magnetic field applied to a primary working fluid circulating between heat-absorbing section 12 and heat-releasing section 13, wherein the primary working fluid is magnetic particle dispersion 11 containing magnetic particles 11 dispersed in a dispersion medium.

Abstract: Diabatic distillation column 1 includes first and second cooling devices 11, 12 configured to indirectly cool fluid in rectifying section 2 with a circulating working fluid, first and second heating devices 21, 22 configured to indirectly heat fluid in stripping section 3 with the circulating working fluid, first compressor 31 configured to compress the working fluid from first cooling device 11 on first circulation path P11-P14 between first cooling device 11 and first heating device 21, second compressor 32 configured to compress the working fluid from second cooling device 12 on second circulation path P21-P24 between second cooling device 12 and second heating device 22, first expansion device 41 configured to expand the working fluid from first heating device 21 on first circulation path P11-P14, and second expansion device 42 configured to expand the working fluid from second heating device 22 on second circulation path P21-P24.

Abstract: Diabatic distillation column 1 includes first and second cooling devices 11, 12 configured to indirectly cool fluid in rectifying section 2 with a circulating working fluid, first and second heating devices 21, 22 configured to indirectly heat fluid in stripping section 3 with the circulating working fluid, first compressor 31 configured to compress the working fluid from first cooling device 11 on first circulation path P11-P14 between first cooling device 11 and first heating device 21, second compressor 32 configured to compress the working fluid from second cooling device 12 on second circulation path P21-P24 between second cooling device 12 and second heating device 22, first expansion device 41 configured to expand the working fluid from first heating device 21 on first circulation path P11-P14, and second expansion device 42 configured to expand the working fluid from second heating device 22 on second circulation path P21-P24.