SYSTEM FOR CONVERSION OF THERMAL ENERGY INTO ELECTRIC ENERGY

The invention relates to a system for converting the thermal energy into electric energy. According to the invention, the system converts the geothermal energy stored within a thermal energy accumulator which, together with the heat pump comprising an evaporator (6), an expansion valve (7), a compressor (8) and a condenser/vaporizer (9), makes up the hot energy source, a working fluid, R 134 a, being overheated by the hot source during its circulation within the condenser/vaporizer, wherefrom the overheated vapours are collected in a buffer-vessel (12) from which the gases having the pressure of 12.5 bar and the temperature of 50°C are delivered to a pneumatic motor (18) which is put into motion and converts the potential energy thereof into mechanical work capable to put into motion an electric generator, thus converting the geothermal energy into mechanical work, where, after gas expansion within the pneumatic motor (18), following the process of energy conversion into mechanical work, the working fluid at low pressure and temperature, corresponding to the achieved efficiency, reaches an energy regenerator (26) where it delivers the remaining residual energy, and the liquified gas being recycled through a coil (27) towards the condenser/vaporizer (9), the working fluid preheating process taking place thereby and increasing the efficiency of the energy conversion system while bringing the gas to the parameters required for it to be liquified in a condenser (32) which, together with the cold water delivery circuit consisting of a pipe (10) makes up the cold source for condensation, it finally reaching the water reservoir (1) through a pipe (34), the liquefied working fluid, R134 a, reaching, by gravity flow, into a reservoir (36) wherefrom, via a hydraulic circuit, a pump (42) recycles the fluid towards the condenser/vaporizer (9), this process representing the start of a new repeatedly operating cycle. Invenţia se referă la un sistem de conversie a energiei termice în energie electrică. Sistemul conform invenţiei transformă energia geotermică stocată într-un acumulator de energie termică ce, împreună cu pompa de căldură formată dintr-un evaporator (6), un ventil (7) de expansiune, un compresor (8) şi un condensator/vaporizator (9), constituie sursa caldă de energie, iar un fluid de lucru R 134a este supraîncălzit de sursa caldă prin circulaţia lui în condensatorul/vaporizator, de unde vaporii supraîncălziţi sunt acumulaţi într-un vas (12) tampon, din care