The assembled heat-electricity-cool tri-cogeneration system is an effective way for reasonable and full-scale utilization of energy source. Experts are paying a great deal of attention to the humid air turbine （HAT） cycle due to its good thermodynamic and environmental performance. A comparison between HAT cycle and STIG cycle has been made

putting forward a new way of energy utilization

i. e

an assembled heat-electricity-cool tri-cogeneration system composed of HAT cycle

and comparing the form and specific property of the said system with those of conventional power-generation system adopting tri-cogeneration. The said assembled tri-cogeneration system composed of simple HAT cycle on the basis of single-shaft compressor has been programmed and calculated

and the regular influence pattern of main system operational parameters upon the specific property of HAT cycle and the said assembled system has been studied.