Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
  • F01K21/00—Steam engine plants not otherwise provided for
  • F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
  • F01K21/047—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas having at least one combustion gas turbine

Definitions

• the present invention relates to an improvement of a novel method of heat recovery or novel heat exchanging system for exhaust gas of a heat engine wherein heat recovery is carried out by way of mixture which is obtained by adding liquid phase water to compressed air or gas including air as the main part thereof which is used as combustion supporting gas or working medium gas or the like, or gaseous fuel, if it is required, in case that such gaseous fuel is used as fuel, or by contacting the former with the latter, which is disclosed by Japanese Patent Serial No. 78808/80.et al.
• the present invention relates to a novel heat exchanging system including the above-mentioned constitution characterized in that heat recovery is carried out by way of a compressed mixture which comprises gas mixture, compressed air mixture or mixture of liquid phase water and the gas mixture or air mixture and is obtained by compressing the air, gas including air as the main part thereof or the gaseous fuel in the presence of liquid phase water.
• a compressed mixture which comprises gas mixture, compressed air mixture or mixture of liquid phase water and the gas mixture or air mixture and is obtained by compressing the air, gas including air as the main part thereof or the gaseous fuel in the presence of liquid phase water.
• heat recovery is carried out by way of mixture which is obtained by adding liquid phase water to compressed air or compressed gas including air as the main part thereof which is used as combustion supporting gas or working medium or the like, or gaseous fuel, if it is required, in case that such gaseous fuel is used as fuel (this is referred to hereafter as "a water injection cycle")
• heat recovery is conducted by way of the mixture in which transformation of water from liquid phase to gas phase is performed under existence of air or gas including air as the main part thereof or under co-existence of air and compressed gaseous fuel, if it is required, in case such gaseous fuel is used as fuel.
• the increase of humidity of compressed gas or compressed air of the water injection cycle is generally performed by contacting liquid phase water from which heat recovery is conducted, if it is required, with intermediate compressed gas or intermediate compressed gaseous fuel, or with finally compressed gas or gaseous fuel discharged from the multi-step gas compressor each step of which is connected in series.
• this method includes one big disadvantage in that it needs a great amount of work for compression due to the separate actuation for compression and increase of humidity, individually.
• the object of the present invention is to provide a novel and improved heat exchanging system without the above-mentioned conventional disadvantages.
• a further object of the present invention is to provide a novel and improved heat exchanging system having high thermal efficiency.
• the present invention accomplishes the above-mentioned objects by using a heat exchanging system for exhaust gas of heat engine wherein heat recovery is carried out by way of a mixture which is obtained by adding liquid phase water to compressed air or gas including air as the main part thereof which is used as combustion gas, working medium gas, or the like, or gaseous fuel, if it is required, in case such gaseous fuel is used as fuel, or by contacting the former with the latter, said heat exchanging system being characterized in that said mixture comprises a compressed gas mixture or compressed air mixture, or a mixture of liquid phase water and the gas mixture or the air mixture which is obtained by compressing air, gas including air as the main part thereof or gaseous fuel in the presence of liquid phase water.
• the present invention is performed by introducing water into the compressor so as not to obstruct the compressing operation.
• compression is carried out while injecting water into absorption gas of the compressor or intermediate discharged gas at each intermediate-step of compressor, if it is required.
• water or a sealing composition including water as the main part thereof is used as sealing medium instead of sealing oil, water lost through vaporization ' being replaced by a corresponding amount of water.
• absorption gas including mist is compressed.
• the so-called PV-value is smaller than that of the conventional system wherein compression and increase of humidity are carried out individually while the temperature after compression falls due to vaporization of water and the number of moles of compressed gas is increased. This results in decrease in compression work and fall of discharged gas temperature after compression.
• the compressed mixture which is obtained by the present method is available for the heat exchanging system advantageously and it brings a great improvement in thermal efficiency.
• the heat exchanging system in accordance with the present invention is significantly superior from the viewpoint of the decrease of compressing work and the improvement in effectiveness of heat recovery and brings about a big improvement in the heat efficiency of the heat engine.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Applications Or Details Of Rotary Compressors (AREA)
• Engine Equipment That Uses Special Cycles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=15817780

Family Applications (1)

Country Status (2)

Citations (3)

• 1980
  • 1980-11-25 JP JP16572080A patent/JPS5788226A/ja active Pending
• 1981
  • 1981-11-25 EP EP81305582A patent/EP0053478A1/de not_active Withdrawn

Patent Citations (3)

Also Published As

Similar Documents

Legal Events