The future of the islands The future of the islands

is is

GreenGreen

Applications presented Applications presented ((ΑΑ))

Efficiency enhancement of solar thermalEfficiency enhancement of solar thermal

Flue gasses heat recoveryFlue gasses heat recovery

Air conditioning heat recoveryAir conditioning heat recovery

Air cooling with fresh airAir cooling with fresh air

Geothermal heat pumpsGeothermal heat pumps

Applications presented Applications presented ((ΒΒ))

Heating Heating –– cooling storagecooling storage

Solar coolingSolar cooling

Tri Tri –– Quadra productionQuadra production

Cooling & dehumidification with desiccant wheels Cooling & dehumidification with desiccant wheels ((adsorption)adsorption)

Grid connected PVsGrid connected PVs

Hybrid systemsHybrid systems–– energy storageenergy storage

Thermal power from Municipal Solid Waste Thermal power from Municipal Solid Waste ((MSW)MSW)

Water economizersWater economizers

Efficiency enhancement of solar Efficiency enhancement of solar

thermalthermal

Can be achieved by using close loop control of water flow Can be achieved by using close loop control of water flow (pump speed), to maintain optimal temperature of heating (pump speed), to maintain optimal temperature of heating medium (water).medium (water).

Close loop control can maintain constant water Close loop control can maintain constant water temperature if needed (solar cooling applications).temperature if needed (solar cooling applications).

Efficiency can be increased by combining conventional and Efficiency can be increased by combining conventional and selective solar collectors.selective solar collectors.

Control panel Control panel

inverter with PID controlinverter with PID control

Programmable controller of thermal solar plant with pump speed cProgrammable controller of thermal solar plant with pump speed control ontrol option. It can also control auxiliary burner and return circuit option. It can also control auxiliary burner and return circuit water water pumps for optimal performance and comfort. East pumps for optimal performance and comfort. East –– west solar fields west solar fields are supported.are supported.

Flue gasses heat recoveryFlue gasses heat recovery

Using simple heat exchangers for temperatures Using simple heat exchangers for temperatures higher than condensing temperature.higher than condensing temperature.

Using condensing heat exchangers to maximize Using condensing heat exchangers to maximize energy recovery of flue gases (for LPG or energy recovery of flue gases (for LPG or natural gas burners)natural gas burners)

Flue gasses heat recovery condensing boilerFlue gasses heat recovery condensing boiler

2 Μcal/h heat

recovery unit

(maximum power

output) connected to a

1,5 Mcal/h steam

generator.

Air conditioning heat recoveryAir conditioning heat recovery

Using metal fin cross flow heat air to air heat Using metal fin cross flow heat air to air heat exchangers. exchangers.

Using rotary heat exchangers (rotary wheel) Using rotary heat exchangers (rotary wheel)

Using Using desiccant wheels desiccant wheels ((adsorption rotary wheel adsorption rotary wheel with silica gel)with silica gel)

Roof mounted heatingRoof mounted heating –– coolingcooling –– ventilationventilation && heat heat

recovery unitrecovery unit

Air cooling with fresh airAir cooling with fresh air

Achieved by supplying large quantities of fresh, Achieved by supplying large quantities of fresh, with a rate greater that 15 times the volume of with a rate greater that 15 times the volume of the building, per hour.the building, per hour.

A desiccant wheel A desiccant wheel ((adsorption rotary wheel) adsorption rotary wheel) can can be used to reduce temperature of a prebe used to reduce temperature of a pre--humidified humidified (cooled) air stream. (cooled) air stream.

Fan Fan –– section & ductssection & ducts

High flow air stream removes heat loadsHigh flow air stream removes heat loads

Inverter control of motor speed Inverter control of motor speed –– air flow controlair flow control

Geothermal heat pumpsGeothermal heat pumps

Heat pump external heat exchanger is realized with Heat pump external heat exchanger is realized with

underground horizontal pipe networks at a 1.5 m depth underground horizontal pipe networks at a 1.5 m depth

(or more), or with the aim of an open or close loop (or more), or with the aim of an open or close loop

borehole pair of pipes. In both cases, soil maintain borehole pair of pipes. In both cases, soil maintain

constant heat exchange outside temperature, around 15 constant heat exchange outside temperature, around 15 ooC.C.

Geothermal heat pumpsGeothermal heat pumps –– pipe networkpipe network

Expansion vesselsExpansion vessels

Pipe network collectorsPipe network collectors

Heating Heating –– cooling storagecooling storage

Based on storage of heating or cooling medium Based on storage of heating or cooling medium (e.g. water), by using insulated tanks.(e.g. water), by using insulated tanks.

Normalize peak demand, and requires smaller Normalize peak demand, and requires smaller power installed, also improves COP of heat power installed, also improves COP of heat pumps.pumps.

House with air to water heatHouse with air to water heat--pump installation pump installation

for heating & coolingfor heating & cooling

Heat pump with heat recoveryHeat pump with heat recovery

1500 1500 litre litre thermaly insulated water thermaly insulated water

tanktank

for heatingfor heating –– cooling cooling

storagestorage

Solar coolingSolar cooling

Based on absorption or adsorption chillers that consume Based on absorption or adsorption chillers that consume

thermal instead of mechanical energy.thermal instead of mechanical energy.

They can be combined with auxiliary thermal energy They can be combined with auxiliary thermal energy

source (diesel, LPG, natural gas, biomass, waste heat, source (diesel, LPG, natural gas, biomass, waste heat,

recovered heat, CHP heat).recovered heat, CHP heat).

Absorption chiller schematic diagramAbsorption chiller schematic diagram

House with solar cooling & heating installationHouse with solar cooling & heating installation

RoofRoof –– solar thermal collector fieldsolar thermal collector field

Absorption chiller Absorption chiller & & cooling towercooling tower

Thermal Thermal

storage tankstorage tank

Stores heated Stores heated

water generated by water generated by

the solar thermal the solar thermal

field at 83 field at 83 ooCC

Auxiliary diesel heaterAuxiliary diesel heater

An office building An office building

with solar cooling with solar cooling

& Quadra & Quadra

production production

installationsinstallations

Solar collector fieldSolar collector field

Hot and cold water Hot and cold water

insulated tanksinsulated tanks

Power & automation control panelsPower & automation control panels

Absorption Absorption

chiller chiller & &

cooling towercooling tower

Auxiliary natural gas heaterAuxiliary natural gas heater & & inox chimneyinox chimney

11ηη installationinstallation ofof SANYO Quadra production in SANYO Quadra production in

Europe, office building, AthensEurope, office building, Athens

TriTri--production units in Rodos Palladium hotelproduction units in Rodos Palladium hotel

Pictures from the visit of the Vice president SANYO Japan & Pictures from the visit of the Vice president SANYO Japan &

CEO of SANYO Europe for the triCEO of SANYO Europe for the tri--production inauguration in production inauguration in

Rhodos, first installation in Greece.Rhodos, first installation in Greece.

Rhodes Palladium Hotel, Rhodos

30 – 40 RT absorption chiller Load distribution unit

Solar thermal field (left)Solar thermal field (left)

Heat medium collection unit Heat medium collection unit 9090 οοC (right)C (right)

Heat medium pumps (left)

Hotel roof with horizontally fitted high temperature collectors (right)

Cooling & dehumidification with Cooling & dehumidification with

desiccant wheels desiccant wheels ((adsorption)adsorption)

Their design is based on a rotating wheel covered by a Their design is based on a rotating wheel covered by a

sorption medium like silica gel. This material initially sorption medium like silica gel. This material initially

removes and stores in its mass air humidity (water), and removes and stores in its mass air humidity (water), and

then is regenerated with the aim of a secondary hot air then is regenerated with the aim of a secondary hot air

stream, that dries silica gel.stream, that dries silica gel.

Operation diagramOperation diagram

Typical installation (hotel)Typical installation (hotel)

Various types of adsorption (orVarious types of adsorption (or desiccant) wheelsdesiccant) wheels

Grid connected PVsGrid connected PVs

A A 5 5 KWp PV grid connected installation on a house KWp PV grid connected installation on a house

complex roofcomplex roof

A A 3 3 x 1500 Watt grid connected inverter with data x 1500 Watt grid connected inverter with data

logging (2006)logging (2006)

A A 20 20 KWp grid connected PV on a houshold roof, KWp grid connected PV on a houshold roof,

Kremasti, RhodosKremasti, Rhodos

A A 20 20 KWp grid connected PV on a warehouse roof, KWp grid connected PV on a warehouse roof,

horizontally fitted, Kremasti, Rhodoshorizontally fitted, Kremasti, Rhodos

PV PV 4 4 KWpKWp,, hotel building,hotel building, IxiaIxia, , RhodosRhodos

PVPV 8 8 KWp, hotel buildingKWp, hotel building, , RhodosRhodos

PV PV 20 20 KWp, Town Hall, Kremasti, RhodosKWp, Town Hall, Kremasti, Rhodos

PVPV 220 KWp0 KWp,, supermarket Pappou,supermarket Pappou, IxiaIxia, , RhodosRhodos

PVPV 20 20 ΚΚWp, waste water treatment plant, Kremasti, Wp, waste water treatment plant, Kremasti,

RhodosRhodos

PVPV 20 20 ΚΚWp thin filmWp thin film, , Maribel hotelMaribel hotel, , Kremasti, RhodosKremasti, Rhodos

PVPV, , Sun Beach Hotel, Ialyssos, RhodosSun Beach Hotel, Ialyssos, Rhodos

Thin film PV installationThin film PV installation, , Rhodos Palladium hotelRhodos Palladium hotel

PVPV 15 15 KWp K Butique hotel, Ixia, RhodosKWp K Butique hotel, Ixia, Rhodos

Pilot Pilot –– educational educational 0.5 0.5 KWp PV, Enviromental KWp PV, Enviromental

Educational Center, Theologos, RhodosEducational Center, Theologos, Rhodos

Equipment Equipment -- installation, Enviromental Educational installation, Enviromental Educational

Center, Theologos, RhodosCenter, Theologos, Rhodos

Grid connected inverters Grid connected inverters 3 3 x 7 KWx 7 KW

Grid connected PV on a car park (Photovoltaic, Grid connected PV on a car park (Photovoltaic,

Athens)Athens)

Consists ofConsists of::

►► 81 81 PV panelsPV panels, ,

►► 3 3 inverters inverters (3kW(3kW eacheach))

►► 1 Data Logger 1 Data Logger for power, energy for power, energy

generation, panel and ambient generation, panel and ambient

temperature, and solar irradiationtemperature, and solar irradiation

Hybrid systemsHybrid systems–– energy storageenergy storage

►► Multi source energy generation systemsMulti source energy generation systems

►► Water desalination powered by hybrid systemsWater desalination powered by hybrid systems

►► Energy storageEnergy storage

►► Energy storage in hybrid cars (plug in cars)Energy storage in hybrid cars (plug in cars)

►► RESRES –– electrolysis and energy storage in hydrogenelectrolysis and energy storage in hydrogen

Eco houseEco house, , stand alone PV assisted by LPG genstand alone PV assisted by LPG gen--setset, ,

RhodosRhodos

System elementsSystem elements

Hellenic NavyHellenic NavyStrogyli island electrification Strogyli island electrification

PV installed powerPV installed power: 2,64 : 2,64 ΚΚWpWp (Photovoltaic)(Photovoltaic)

A reverse osmosis water desalination plant supplied A reverse osmosis water desalination plant supplied

by PV & Wind turbine hybrid stand alone system by PV & Wind turbine hybrid stand alone system

(Photovoltaic)(Photovoltaic)

Hydraulic energy storage (two lake system)Hydraulic energy storage (two lake system)

Compressed air electricity storage applicationCompressed air electricity storage application

Compressed air storage chamberCompressed air storage chamber

290 290 MW compressed air energy storage plantMW compressed air energy storage plant

Energy storage in Na Energy storage in Na –– Sulfur (NAS) batteriesSulfur (NAS) batteries

Wind power pilot installation with energy storageWind power pilot installation with energy storage

Wind power installation with energy storageWind power installation with energy storage

Wind power installation with energy storage (BOS)Wind power installation with energy storage (BOS)

PV park of PV park of 55 MWp with energy storageMWp with energy storage

VRB batteriesVRB batteries

2 tank electrolyte system, a characteristic of2 tank electrolyte system, a characteristic of VRB VRB

batterybattery

King Island caseKing Island case

System upgrade: addition of an energy storage unitSystem upgrade: addition of an energy storage unit

VRBVRB Energy storage unit imagesEnergy storage unit images

Wind park with energy storage inWind park with energy storage in VRB VRB

(vanadium redox batteries)(vanadium redox batteries)

Energy storage in HokkaidoEnergy storage in Hokkaido

Kythnos hybrid system caseKythnos hybrid system case

Phases of system evolutionPhases of system evolution

Kythnos hybrid system in Kythnos hybrid system in 19831983

System upgrade in System upgrade in 20012001

Comparison of power stationsComparison of power stations’’ installedinstalled –– vehicle vehicle

installed power in Europeinstalled power in Europe

PlugPlug--in vehicles & grid integrationin vehicles & grid integration

PlugPlug--in hybrid carin hybrid car

Commercial vehicle Commercial vehicle with plugwith plug--in optionin option

Hydrogen energy storageHydrogen energy storage

Energy storage with electrolytic hydrogen generationEnergy storage with electrolytic hydrogen generation

Hydrogen application images, showing clearly the Hydrogen application images, showing clearly the

futurefuture

A nice energy storage illustrationA nice energy storage illustration

Scientific interest for energy storage is escalatingScientific interest for energy storage is escalating

IRES II, World Conference Center, Bonn, 2007IRES II, World Conference Center, Bonn, 2007

Thermal power from Municipal Thermal power from Municipal

Solid Waste Solid Waste ((MSW)MSW)

MSW is a invaluable thermal energy source, as MSW is a invaluable thermal energy source, as

incineration or pyrolysis recovers energy stored in incineration or pyrolysis recovers energy stored in

the organic mass in a form of chemical energy the organic mass in a form of chemical energy

after natural processes like photosynthesis or after natural processes like photosynthesis or

industrial and chemical processes (e.g plastics).industrial and chemical processes (e.g plastics).

Waste to heat MSW incineration plantWaste to heat MSW incineration plant

Flow chartFlow chart

A waste to heat layoutA waste to heat layout

Plant view from a small size waste to heat plantPlant view from a small size waste to heat plant

MSW plant in MallorcaMSW plant in Mallorca

Control panelControl panel

Inspection window of furnaceInspection window of furnace

Flue gasses measuring & monitoring unitFlue gasses measuring & monitoring unit

Chemical analysis laboratoryChemical analysis laboratory

Waste separation unit Waste separation unit

Anaerobic digestion of organic content of wasteAnaerobic digestion of organic content of waste

Anaerobic digestion unitAnaerobic digestion unit

Fermentation Fermentation –– biogas storage vesselbiogas storage vessel

Schematic of gasification unit

Water economizersWater economizers

Low Purchase and installation cost , based on Low Purchase and installation cost , based on

very simple design.very simple design.

Operation principle is based on mixing water with air. Operation principle is based on mixing water with air.

Though technology involved is quite simple, environmental Though technology involved is quite simple, environmental

and financial benefits are very significant.and financial benefits are very significant.

They reduce actual water They reduce actual water

flow by 50% to 70%flow by 50% to 70%

Total water consumption Total water consumption

is reduced by 30% to is reduced by 30% to

60%60%

They reduce the installed power and energy They reduce the installed power and energy consumption of boilerconsumption of boiler

They increase the energy contribution of existing They increase the energy contribution of existing solar thermal plantssolar thermal plants

They reduce energy consumption of fossil fuels.They reduce energy consumption of fossil fuels.

They reduce waste water treatment plant loads.They reduce waste water treatment plant loads.

They eliminate emptying of waste water buffer They eliminate emptying of waste water buffer

and sink. and sink.

They reduce energy consumption of water They reduce energy consumption of water

pressure pumps.pressure pumps.

They reduce water pumping from boreholes. They reduce water pumping from boreholes.

They reduce consumption of precious clean They reduce consumption of precious clean water.water.

They enable escalating and decent water They enable escalating and decent water consumption invoicing of water utilities, as cost consumption invoicing of water utilities, as cost per capita is reduced.per capita is reduced.

Thank youThank you!!

Stavros VolasStavros VolasBEng, MSc, Env AuditorBEng, MSc, Env Auditor