Abstract: A heat transfer apparatus with a zigzag passage is provided. The apparatus includes a pair of opposed plates 11, 12, a bent plate 21 having a wavy cross sectional shape for dividing the space between both plates into a plurality of side-by-side passages 20a, 20b, and a pair of cover members 13, 14, bonded to the bent plate 21, for forming connecting portions 20c, 20d between the side-by-side passages. One sidewall portion 23a of both sidewall portions 23a, 23b of the bent plate 21 is coupled to the cover member 13 on one end of a rectangular groove. The other sidewall portion 23b is coupled to the cover member 14 on the other end of the rectangular groove. Thus, a zigzag passage 20 is formed in which one side of the rectangular groove is folded to oppose the other side of the rectangular groove.

Abstract: A heat transfer apparatus with a zigzag passage is provided. The apparatus includes a pair of opposed plates 11, 12, a bent plate 21 having a wavy cross sectional shape for dividing the space between both plates into a plurality of side-by-side passages 20a, 20b, and a pair of cover members 13, 14, bonded to the bent plate 21, for forming connecting portions 20c, 20d between the side-by-side passages. One sidewall portion 23a of both sidewall portions 23a, 23b of the bent plate 21 is coupled to the cover member 13 on one end of a rectangular groove. The other sidewall portion 23b is coupled to the cover member 14 on the other end of the rectangular groove. Thus, a zigzag passage 20 is formed in which one side of the rectangular groove is folded to oppose the other side of the rectangular groove.

Abstract: A gas turbine driven power system includes a shell having an air inlet and an exhaust outlet. Mufflers are provided at the air inlet and the exhaust outlet, respectively. A gas turbine as a power source is provided in the shell and includes an inlet port and an outlet port. A heat exchanger is further provided in the shell in an air-passing space free of barrier formed between the muffler at the air inlet and the inlet port of the gas turbine. It is so arranged that all the air introduced into the shell through the air inlet passes through the heat exchanger for heat exchange with heat generated inside the shell.

Abstract: A cooling apparatus used, for instance, for a laser which is low in the consumption of energy and can be made small in size. The cooling apparatus includes: an outside air - water heat exchanger (or outside air cooler 15) as a first cooler; a refrigerant - water heat exchanger (or refrigerating cooler 27) as a second cooler; an outside air temperature sensor (22) for detecting an outside air temperature; and a control section (5) which, according to an outside air temperature, selects a refrigerator-cooler joint use mode for operating both the outside air cooler (15) and the refrigerating cooler (27), or an outside air cooler single use mode for operating only the outside air cooler (15) with the refrigerating cooler (27) stopped.

Abstract: A deicer includes a water tank storing water and an antifreeze solution tank storing an antifreeze solution. The water tank and the antifreeze solution tank are provided with heat exchangers, respectively. Pumps are further provided for feeding the water and the antifreeze solution in the respective tanks to a spray nozzle for spraying out a mixture of the water and the antifreeze solution. A gas turbine is provided for driving the foregoing pumps. Exhaust gas of the gas turbine is introduced into the heat exchangers through a control of valve switching so as to hold temperatures of the water and the antifreeze solution in the respective tanks to be constant. Further, bleed air of the gas turbine is fed to an air nozzle so as to be jetted out therefrom.