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DE3625223A1
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Internal combustion engine
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DE3613596A1
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Heat exchanger and process for producing it
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DE3545936A1
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DEVICE FOR UTILIZING HEATING ENERGY
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Heat converter and method of operating it
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Combustion gas heat recovery process - cools gases from boiler to below ambient temp. before passing into chimney
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DEVICE FOR HEATING CONVERSION
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PROCEDURE FOR CONTROLLING A HOT GAS ENGINE ALSO WORKING WITH A FREE-SWINGING PISTON
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Gas or oil fired heating system - operates absorption heat pump with optionally connected heating channel for expeller
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DE2441687A1
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Roof mounted building ventilator device - has sub divided air conduction pipe for air input and output which penetrates the roof
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DE2439131A1
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Thermo-electric power transducer with heat store - has Peltier cell system with heat flow between store and cell system controllable
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