Abstract: The invention relates to a forward-launching method and device for aircraft and spacecraft, characterized in that a launching booster arranged on the ground is used to efficiently generate forward-launching thrust and kinetic energy to propel the aircraft and spacecraft to generate a off-ground speed as high as possible, and against this background, an aircraft and spacecraft engine is ignited for work, thereby greatly reducing invalid load of fuel and oxygen as carried by the aircraft and spacecraft to highly improve thermal efficiency of aerospace engineering and significantly reduce the energy consumption cost of the aerospace engineering.

Abstract: The present invention relates to an isothermal compression type heat engine using air as a heat working medium. It is technically characterized as follows. An air compressor is used to replace an adiabatic air compressor. Two engineering courses being air compression and expansion work are performed separately in different engine members, so as to significantly increase a working pressure of the heat engine. Temperature gradient type heat preservation composite tubes are disposed to recycle remaining heat of exhaust gas with high efficiency, so as to distinctly improve the heat efficiency of the heat engine.

Abstract: A pure-phase-trans formation and heatless (PPT&H) refrigerating process and method of installation. The system comprises a phase-transformation multistage refrigeration cycle of at least two stages. The first stage compresses vapor, the other stages all utilize the cool of lower temperature provided by the refrigeration cycle of the preceding stage to liquefy the vapor of the current stage to implement the refrigeration cycle by means of cool. A compressor and a condenser of the next stage are immersed in the liquid-state refrigerant of the next stage to have the generated heat all absorbed by the vaporizing latent heat of the next stage, so that the temperature of condensation becomes approximately the temperature of evaporation to achieve normal refrigeration and supplying cool. The evaporation temperature of the refrigerant in each refrigeration cycle rises stage by stage according the connecting sequence of the system.

Abstract: This invention relates to a method of refrigeration purification and power generation of industrial gas and apparatus therefor. The apparatus is comprised of two parts, the front part of which is constituted by a multi-stage phase changeable refrigeration cycle of pure-phase changeable non-heat refrigeration technique for effectively obtaining cool quantity; the rear part of which makes use of the feature that the toxic and harmful gas in the waste gas has the higher boiling point than clean gas, the waste gas is firstly condensed and liquefied to be separated; the liquefied clean gas and the liquid refrigeration medium of the last stage absorb heat from waste gas in order to be evaporated into steam to drive expansion turbine groups respectively to work, while collecting a mechanical power in a negative compression region and adding a mechanical energy loss of initial cooled waste gas during compression.