MD1184Z

MD1184Z - Wave energy conversion plant

Info

Publication number: MD1184Z
Application number: MDS20170017A
Authority: MD
Inventors: Виорел БОСТАН; Ион БОСТАН; Валериу ДУЛГЕРУ; Кэтэлин ДУМИТРЕСКУ; Раду ЧОБАНУ; Олег ЧОБАНУ
Original assignee: Технический университет Молдовы
Priority date: 2017-02-10
Filing date: 2017-02-10
Publication date: 2018-03-31
Also published as: MD1184Y

Abstract

The invention relates to the field of renewable energy, namely to wave energy conversion plants.The wave energy conversion plant comprises a frame, inside which, on the lower part, are fixed at least two pairs of pneumatic cylinders (4) with pistons (3), which communicate with the floating bodies (1) by means of hollow rods (2), on the lower end of which are installed valves (5). The plant also comprises a pressure accumulator (8), which communicates with the cylinders (4) by means of conduits (7), at the same time the accumulator (8), through a conduit, communicates with the suction chamber of an ejector turboengine (9), the driven shaft (10) of which is connected to the driving shaft (11) of a planetary precessional gearbox (12), the driven shaft (13) of which is connected to the rotor of an electric generator (14), which are fixed on the upper part of the frame.

Description

Inventia se referă la domeniul surselor regenerabile de energie, şi anume la instalaţiile de conversiune a energiei valurilor. The invention relates to the field of renewable energy sources, namely to wave energy conversion installations.

Este cunoscută instalaţia de conversiune a energiei valurilor care include o carcasă scufundată în apă, un dispozitiv de pompare a aerului comprimat, instalat pe fiecare corp plutitor, care alimentează o turbină conectată la un generator electric [1]. The wave energy conversion installation is known which includes a housing submerged in water, a compressed air pumping device, installed on each floating body, which powers a turbine connected to an electric generator [1].

Dezavantajul acestei instalaţii constă în eficienţa de conversiune relativ redusă. The disadvantage of this installation is the relatively low conversion efficiency.

Cea mai apropiată soluţie este instalaţia, care include o carcasă, cel puţin un corp plutitor unit articulat de partea de jos a carcasei prin intermediul uneia sau a mai multor structuri de sprijin şi a unui sau a mai multor arbori de sprijin pentru a asigura o mişcare alternativă pistoanelor dispozitivului de pompare sub presiune a apei [2]. The closest solution is the installation, which includes a casing, at least one floating body articulated to the bottom of the casing by means of one or more support structures and one or more support shafts to ensure an alternative movement of the pistons of the water pressure pumping device [2].

Dezavantajul acestei instalaţii constă în eficienţa redusă de conversiune a energiei valurilor. The disadvantage of this installation is the low efficiency of wave energy conversion.

Problema pe care o rezolvă invenţia constă în creşterea eficienţei de conversiune şi a productivităţii instalaţiei. The problem that the invention solves consists in increasing the conversion efficiency and productivity of the installation.

Instalaţia de conversiune a energiei valurilor, conform invenţiei, înlătură dezavantajele menţionate mai sus prin aceea că include o carcasă, în interiorul căreia, pe partea de jos, sunt fixate cel puţin două perechi de cilindri pneumatici cu pistoane, care comunică cu nişte corpuri plutitoare prin intermediul unor tije cave, pe capătul de jos al cărora sunt instalate nişte supape, un acumulator de presiune, care comunică cu cilindrii prin intermediul unor conducte, totodată acumulatorul, printr-o conductă, comunică cu camera de aspiraţie a unui turbomotor cu ejecţie, arborele condus al căruia este unit cu arborele conducător al unui reductor planetar precesional, arborele condus al căruia este unit cu rotorul unui generator electric, care sunt fixate pe partea de sus a carcasei. The wave energy conversion installation, according to the invention, eliminates the above-mentioned disadvantages by including a housing, inside which, on the lower side, at least two pairs of pneumatic cylinders with pistons are fixed, which communicate with floating bodies by means of hollow rods, on the lower end of which valves are installed, a pressure accumulator, which communicates with the cylinders by means of pipes, at the same time the accumulator, through a pipe, communicates with the suction chamber of an ejection turbo engine, the driven shaft of which is connected to the driving shaft of a precessional planetary reducer, the driven shaft of which is connected to the rotor of an electric generator, which are fixed on the upper side of the housing.

Realizarea sistemului de conversiune a energiei valurilor în formă de corpuri plutitoare unite cu pistoanele cilindrilor pneumatici asigură acumularea energiei valurilor în acumulatoare de aer comprimat. The realization of the wave energy conversion system in the form of floating bodies connected to the pistons of pneumatic cylinders ensures the accumulation of wave energy in compressed air accumulators.

Conectarea turbomoturului cu ejecţie la acumulatorul cu aer comprimat şi reducerea vitezei unghiulare a arborelui condus asigură majorarea momentului de torsiune la rotorul generatorului electric şi majorarea puterii generate. Connecting the ejection turbomotor to the compressed air accumulator and reducing the angular speed of the driven shaft ensures an increase in the torque at the rotor of the electric generator and an increase in the generated power.

Invenţia se explică prin desenele din fig. 1-2, care reprezintă: The invention is explained by the drawings in Fig. 1-2, which represent:

- fig. 1, vederea generală a instalaţiei de conversiune a energiei valurilor; - Fig. 1, general view of the wave energy conversion installation;

- fig. 2, vederea generală a instalaţiei de conversiune a energiei valurilor cu acumulatorul în afara carcasei. - Fig. 2, general view of the wave energy conversion installation with the accumulator outside the housing.

Instalaţia de conversiune a energiei valurilor include o carcasă, în interiorul căreia, pe partea de jos, sunt fixate cel puţin două perechi de cilindri pneumatici 4 cu pistoane 3, care comunică cu nişte corpuri plutitoare 1 prin intermediul unor tije cave 2, pe capătul de jos al cărora sunt instalate nişte supape 5. De asemenea instalaţia conţine un acumulator de presiune 8, care comunică cu cilindrii 4 prin intermediul unor conducte 7, totodată acumulatorul 8, printr-o conductă, comunică cu camera de aspiraţie a unui turbomotor cu ejecţie 9, arborele condus 10 al căruia este unit cu arborele conducător 11 al unui reductor planetar precesional 12, arborele condus 13 al căruia este unit cu rotorul unui generator electric 14, care sunt fixate pe partea de sus a carcasei. The wave energy conversion installation includes a housing, inside which, on the lower side, at least two pairs of pneumatic cylinders 4 with pistons 3 are fixed, which communicate with floating bodies 1 by means of hollow rods 2, on the lower end of which valves 5 are installed. The installation also contains a pressure accumulator 8, which communicates with the cylinders 4 by means of pipes 7, at the same time the accumulator 8, through a pipe, communicates with the suction chamber of an ejection turbo engine 9, the driven shaft 10 of which is connected to the driving shaft 11 of a precessional planetary reducer 12, the driven shaft 13 of which is connected to the rotor of an electric generator 14, which are fixed on the upper side of the housing.

Instalaţia de conversiune a energiei valurilor funcţionează în modul următor. The wave energy conversion plant operates in the following way.

Mişcarea de translaţie pe direcţia verticală a corpurilor plutitoare 1 (ridicate de valuri) prin intermediul tijelor 2 se transmite pistoanelor 3 care efectuează comprimarea aerului în camerele de presiune 6 ale cilindrilor 4, aspirând prin cavitatea tijei 2 şi supapele 5. Aerul comprimat din camerele de presiune 6 prin supapele 5 se transmite în acumulatorul de aer comprimat 8. În continuare aerul din acumulatorul de aer comprimat 8, după ce atinge o presiune stabilită, alimentează turbomotorul cu ejecţie 10, antrenând în mişcare de rotaţie cu frecvenţă înaltă (n10=20000÷100000 min-1) roata pneumatică unită cu arborele condus 10. Mişcarea de rotaţie a arborelui condus 10 al turbomotorului cu ejecţie 9 este transmisă arborelui conducător 11 al reductorului planetar precesional 12, în care este redusă cu un grad înalt de reducţie. De exemplu, pentru n10=20000 min-1, turaţia generatorului electric n14=1500 min-1, gradul de reducere va fi: The translational movement in the vertical direction of the floating bodies 1 (lifted by the waves) through the rods 2 is transmitted to the pistons 3 which compress the air in the pressure chambers 6 of the cylinders 4, sucking through the cavity of the rod 2 and the valves 5. The compressed air from the pressure chambers 6 through the valves 5 is transmitted to the compressed air accumulator 8. Next, the air from the compressed air accumulator 8, after reaching a set pressure, feeds the ejection turbomotor 10, driving in high-frequency rotation (n10=20000÷100000 min-1) the pneumatic wheel connected to the driven shaft 10. The rotational movement of the driven shaft 10 of the ejection turbomotor 9 is transmitted to the driving shaft 11 of the precessional planetary reducer 12, in which it is reduced with a high degree of reduction. For example, for n10=20000 min-1, the speed of the electric generator n14=1500 min-1, the reduction ratio will be:

. .

Momentul de torsiune la rotorul generatorului electric va fi: The torque at the rotor of the electric generator will be:

unde ηr.p. - randamentul reductorului planetar precesional ( ). where ηr.p. - the efficiency of the precessional planetary reducer ( ).

Soluţia tehnică propusă permite majorarea eficienţei de conversie şi a productivităţii de producere a energiei electrice. Deosebit de important este că poate asigura acumularea energiei şi producerea energiei electrice în orele de vârf de consum. The proposed technical solution allows for increasing conversion efficiency and electricity production productivity. Particularly important is that it can ensure energy accumulation and electricity production during peak consumption hours.

1. RU 2146774 C1 2000.03.20 1. RU 2146774 C1 2000.03.20

2. US 2016327013 A1 2016.11.10 2. US 2016327013 A1 2016.11.10

Claims

Wave energy conversion installation, which includes a housing, inside which, on the lower side, are fixed at least two pairs of pneumatic cylinders (4) with pistons (3), which communicate with floating bodies (1) by means of hollow rods (2), on the lower end of which valves (5) are installed, a pressure accumulator (8), which communicates with the cylinders (4) by means of pipes (7), at the same time the accumulator (8), through a pipe, communicates with the suction chamber of an ejection turbo engine (9), the driven shaft (10) of which is connected to the driving shaft (11) of a precessional planetary reducer (12), the driven shaft (13) of which is connected to the rotor of an electric generator (14), which are fixed on the upper side of the housing.