Alternative Energy Print E-mail
Monday, 27 September 2010 17:48

1. A BIOMASS COGENERATION PROJECT IN ISRAEL. FEASIBILITY STUDY

G. JINJIKHASHVILY, D. YITZHAK, M. ZAHER
(Israel)

The article presents a preliminary feasibility study of project of biomass residue cogeneration power plant at food Industries in Israel. The project goal is to provide the plant with cheap and clean electric and thermal energy.

The study has been done by IEC Engineering Division Mechanical Systems Design Department in collaboration with Ecotop Karmiel with the goal to serve a documented basis for joint project of erection and operation of biomass residue firing CHP (Combined Heat and Power) unit.

The typical considering factory works 24 hours per day every day except Friday, Saturday and holydays. 58 tons/hour of steam at 12 barg are generated in few heavy oil firing boilers and consumed in production process.

Electricity consumption is about 7 MW; the factory is fed by 24 kV line. The basic assumptions are that saw dust or/and wooden chips with LHV (Low Heating Value) 18,000 kJ/kg will be fired in a fluidized bed boiler producing about 30 ton/hour steam (about a half of needed process steam). The steam flow, passing through a back pressure turbine, will generate electricity corresponding to difference of enthalpies of fresh steam generated in the boiler and of one needed for process. From the turbine outlet the steam will be used, as today, for the technological process of the factory.



2. A NOVEL TECHNOLOGY FOR IN-SITE HEAT AND POWER GENERATION FROM BIOMASS

G. JINJIKHASHVILY (IEC), YU. WLADISLAWSKY, Z. BILDER (GENOVA LTD)
(Israel)


A novel technology for electricity in site generation in small units (up to 500 kW) from biomass is being developed by Genova Ltd. The technology core consists of a vertical pyrolytic reactor with moving biomass bed lifted by an agitator-mixer. Fresh biomass particles are mixed with hot particles of the formerly produced charcoal, being converted into charcoal, as well. Local sparks (micro-plasma), occurring due to current, passing through the mixture of conductive (charcoal) and dielectric (fresh biomass) particles cause intensive heating and so conversion of the last into charcoal and gas-vapors mixture. A part of the charcoal falls down to the lower compartment, which is a combination of a downdraft gasifier with a hot carbon filter providing removal of a big part of tars. After a gasifier and a washing and cooling systems produced gases are fired in a gas engine (or a turbine) to produce heat and power or in a combustion chamber. In the last case, combustion gases are diluted by air to reduce temperature down to 500°C which can be used in ORC.



3. BRIEF OVERVIEW ON NOVEL NUCLEAR ENERGY GENERATION TECHNOLOGIES AND INSTRUMENTS

P. KERVALISHVILI
(Georgia)

Nuclear reactor technology has been under continuous development since the first commercial exploitation of civil nuclear power in the 1950s. This technology is presented at different stages, or "generation" of nuclear reactor development, each representing a significant technical step advancement compared with the previous generation. Nuclear power is the principal carbon-free source of electricity, and therefore plays a key role in limiting greenhouse gas emissions.

Improving scientific and technical knowledge and competences in the areas of safety, sustainability, security, reliability and cost effectiveness of nuclear energy and other applications of nuclear technology are one of the main tasks of world science and technology community.

The paper represents the analyze of existing level of nuclear energy systems development.

The primary task in this research area is to coordinate the development of concepts and processes that can address the key outstanding issues in elaboration of novel effective technologies and constructions for nuclear energy preparation.

It is shown that performed theoretical, physica-technical and technological research works clearly indicate the prospects of using new materials, devices and designing schemes for creation of highly effective energy generating and control and safety systems for different nuclear reactors.
Particular attention was paid to the development of new and upgrading of existing technologies for designing and preparing the optimizing nuclear technology methods and tools for obtaining desirable operational parameters of nuclear instruments such as rods of control and safety systems of nuclear reactors.



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