C O N T E N T S

concept is first explained through a simple thermodynamic example: a
hot water storage tank. This system is then used to explain the relation
between energy and time. Thus, a contribution is made to dynamic
eMergy calculations through the evaluation of this system, as it differs
from several published static emergy calculations.
Key words: energy, dynamic system.
THERMOECONOMIC ANALYSIS OF A COMBINED HEAT
AND POWER SYSTEM
by
CLAUDIA IONIŢĂ, MIRCEA MARINESCU, ALEXANDRU
DOBROVICESCU and EUGENIA-ELENA VASILESCU
Abstract. This paper presents exergetic and economic analyses as
well as a simulation of a cogeneration system based on gas turbine.
The exergy analysis is based on the first and second laws of
thermodynamics. In these analyses, mass and energy conservation
laws were applied to each component of the system. Quantitative
balances of the exergy and exergetic cost for each component, and for
the whole system was carefully considered. The exergoeconomic
model, which represented the productive structure of the system
considered, was used to visualize the cost formation process and the
productive interaction between components. The results showed good
agreement with the reported data.
Key words: cogeneration, exergetic product, exergetic fuel,
exergetic efficiency, optimization.
ON SIMULATION OF WET AIR CONVECTION IN THE
INCLINED CAPACITOR
by
FEDOR GROSU, MIRCEA BOLOGA and OLEG MOTORIN
Abstract. Possibility of obtaining water and electric power from
atmosphere is shown. Simulation of moisture circle and electric charge
separation in near Earth space is carried out and the density of the
convection electric current produced by the electrohydrodynamic channel