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of Stirling engine, functioning with initial filling pressures, was used to carry out experiments. We have finally, validated the results obtained by the model with experiments. Key words: Stirling motor, pressure of remplisage, adiabatic model, amelioration. RECOVERY OF ORGANIC WASTE IN THEIR RECYCLING IN AGRICULTURE by ILINCA DINU and OANA GHEORGHIŢĂ Abstract. Currently, worldwide, household and industrial activities of population from urban centers produce large quantities of solid and liquid waste. From all these wastes the most aggressive towards the environment are those of organic nature, because of their rapid fermentation resulting a massive air and soil pollution. From this category of waste are the organic sludge resulted from the wastewater treatment process in urban cleaning stations. Considering the requirements of the European environmental protection rules that have been imposed by the restrictions of current legislation, the authors of this paper deals with some innovative aspects of waste recycling, on the one hand to protect the environment, and on the other hand to exploit mineralized organic waste as organic fertilizer in agriculture. Key words: waste, sewage sludge, capitalization. SOME EXPERIMENTAL ASPECTS OF BIOMASS BURNING by MANUELA ELENA GEORGESCU, LUCIAN MIHĂESCU, IONEL PÎŞĂ, TUDOR PRISECARU, ION OPREA and GABRIEL NEGREANU Abstract. The paper purpose is to present some of the problems appearing in boilers when burning biomass. The specific burners for the specific fuel, the fuel preparation technology and the experiments achieved on pilot and industrial boilers are presented in the paper. Key words: biomass, burner, composite briquettes, boiler.
UTILISATION SIMULTANÉE DE CHALEUR ET DE FROID EN INDUSTRIE AGRO-ALIMENTAIRE, À L'AIDE DE MACHINES À COMPRESSION MÉCANIQUE DE VAPEUR : QUEL CRITÈRE D'EFFICACITE? par RAHAL BOUSSEHAIN, DIMITER DIMITROV et MICHEL FEIDT Abstract. A double use thermofrigopump vapour compression machine model is proposed in the present paper. This model is relative to steady state irreversible system, and takes account of finite size constraint through the heat transfer laws. Thermodynamical efficiencies of this system has been defined and compared. The corresponding optimization results are proposed. Key words: hydrogen, HRG, thermal cutting. VALORISATION DES GRAISSES ANIMALES COMME BIOCOMBUSTIBLE POUR MOTEURS DIESEL par NADIA MRAD, FETHI ALOUI, MOHAND TAZEROUT, SASSI BEN NASRALLAH et HASSEN ABDALLAH Abstract. In this work, we aim at studying the recovery of beef fat by the technique of pyrolysis to produce a biofuel for diesel engines. The goal is to monitor the performance and the acidity of the final liquid fuel (pyrolysis oil) and to identify the various noncondensable gases released. Key words: Animal fat, pyrolysis, catalytic cracking, bio-fuel, acidity. STUDY OF BIODIESEL OBTAINED THROUGH VALORIFICATION OF BIOMASS by CAMELIA CIUBOTĂ-ROŞIE, LAURA BULGARIU, CEZAR CATRINESCU, IRINA VOLF and MATEI MACOVEANU
Page 1 and 2: BULETINUL INSTITUTULUI POLITEHNIC D
Page 3 and 4: MIRCEA BOLOGA (Moldova), FEDOR GROS
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Page 25 and 26: CORINA DANA CERNĂIANU et MARIN BIC
Page 27 and 28: Abstract. The Gas-Steam Combined Cy
Page 29: MECANIQUE: SYSTÈMES ET ÉQUIPEMENT

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