Cristian PURECE

35-78 DETERMINAREA DEBITULUI LA CENTRALELE HIDROELECTRICE DE MICĂ CĂDERE DOTATE CU TURBINE KAPLAN

Această intrare a fost publicată în 2019 Volumul 35 și etichetată Cristian PURECE Valeriu PANAITESCU la de

DETERMINATION OF FLOW RATE AT LOW HEAD HYDRO POWER PLANTS FEATURE WITH KAPLAN TURBINES

In the paper there are presented some methods of determination of the flow rate measurements in low head hydro power plans are also presented with a series of field studies. The most commonly used method for determining the flow in convergent measurement sections is the multipoint velocity measurement with propeller type current meters. For flow rate evaluation integration of the difference between measured velocities and a known velocity distribution is recommended. One of the newest methods of flow determination in intakes is the acoustic scintillation method, a cross-correlation method. For accurate results the scintillation method must be installed downstream of trash racks. Another method that can also be adopted to measurements in low head, is method of acoustic transit measurement, but new procedures for determination weighing the individual path velocities have to be applied due to varying shape of the flow cross sections. At the end of the paper a comparative analysis is made between the methods for determining the flow rate in the convergent measuring sections

Keywords: flow rate measurement, Winter-Kennedy method, efficiency, acoustic scintillation, acoustic transit time, velocity – area Cuvinte cheie: măsuratori debitmetrice, metoda Winter-Kennedy, randament, metoda scintilaţiei acustice, metoda acustică a timpului de tranzit, metoda viteză– arie

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34-25 REPARTIŢIA OPTIMĂ A PUTERII ÎNTRE HIDROAGREGATELE UNEI CENTRALE HIDROELECTRICE

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Adrian ADAM Cristian PURECE Valeriu PANAITESCU la de

OPTIMAL POWER REPARTITION BETWEEN UNITS OF A HYDRO POWER PLANT
The paper presents a methodology for the operation of those hydro power plants provided with more penstocks and more units by the optimal distribution of the dispatched power among its available generating units, aiming at the maximum efficiency of the completely hydro power plant energy conversion. Considering the unit operating characteristics as unequal at different head levels, the authors propose a modern program of optimal distribution of power between the units of a hydro power plant to take into account the real characteristics and real head for each unit to define the actual performance specifications. Further, this information can be utilized in the optimization process to minimize water expenditure at hydropower plant.
Keywords: hydro power plant, hydro unit, efficiency, hydraulic turbine, optimal load distribution
Cuvinte cheie: centrală hidroelectrică, hidroagregat, randament, turbina hidraulică, distribuţia optima a încărcării

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32-6 DETERMINAREA PARAMETRILOR REALI DE FUNCŢIONARE A HIDROAGREGATELOR DIN CENTRALELE DE MICĂ CĂDERE

Această intrare a fost publicată în 2017 Volumul 32 și etichetată Adrian ADAM Cristian PURECE Valeriu Nicolae PANAITESCU la de

DETERMINATION OF THE ACTUAL OPERATING PARAMETERS OF THE HYDRO UNITS OF A LOW HEAD HYDRO POWER PLANT

 

The paper presents the flow rate calculation and measurement methodology for a high flow/low head hydro power plant with upstream cofferdam recesses.

At the same time, the paper presents the results of the in situ measurements of the actual operating parameters of the hydropower units, especially of the flow rate measurements carried out on the hydropower units’ no.1 and no. 2 of Robeşti HPP. The measurements have been carried out in agreement with the provisions of CEI 41/1991 [4].

 

Keywords:  discharge, efficiency, current meter method, hydro unit

Cuvinte cheie: debit, randament, metoda moriştilor hidrometrice, hidroagregat

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27-56 CAPACITATEA DE ÎNCĂRCARE A UNEI CENTRALE HIDROELECTRICE ÎN FUNCŢIE DE NIVELUL ÎN LACUL AVAL

Această intrare a fost publicată în 2015 Volumul 27 și etichetată Cristian PURECE Iulian BĂLĂUNŢESCU Sorin DUMITRESCU la de

THE LOAD CAPACITY OF A HYDROELECTRIC
POWER PLANT BY THE LAKE TO DOWNSTREAM
In the paper presents the results of measurements of the tailrace of the hydroelectric power Șugag underground HPP (high head cents) to determine the maximum power that can be achieved with the safe operation of the plant by Şugag HPP capacity transport manifold run it. The paper presents how to perform monitoring and protection system for monitoring water levels in tailrace.
Keywords: hydroelectric power plant, hydraulic turbine, efficiency, run gallery
Cuvinte cheie: centrală hidroelectrică, turbină hidraulică, randament, galerie de fugă

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25-33 DETERMINAREA DEBITULUI TURBINAT LA O CENTRALĂ DE MARE CĂDERE

Această intrare a fost publicată în 2014 Revista Volumul 25 și etichetată Carmen CĂRĂUŞU Cristian PURECE Iulian BĂLĂUNŢESCU la de

DETERMINATION OF TURBINE FLOW IN
A CENTRAL HIGH DROP
Optimal use of water resources in a hydro ensures both by design and
by the rational (optimal) planning installations.
Obtaining maximum power consumption for the same volume of water
is one of the ways to increase the efficiency of electricity production.
Keywords: yield, flow, the turbine gauging, the hydro-power plant,
hydroelectric turbine
Cuvinte cheie: randament, debit, morişti hidrometrice, centrală
hidroelectrică, turbină hidroelectrică
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