Lamma Power Station Solar Power System

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Lamma Power Station Solar Power System. Content. Project Background Site Selection Amorphous Silicon Thin Film Photovoltaic System Environmental Benefits Challenges Project Schedule Summary and Way Forward. Project Background. - PowerPoint PPT Presentation

Text of Lamma Power Station Solar Power System

  • Lamma Power Station Solar Power System

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    ContentProject BackgroundSite SelectionAmorphous Silicon Thin Film Photovoltaic SystemEnvironmental Benefits ChallengesProject ScheduleSummary and Way Forward

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    Project Background To widen the use of renewable energy in HK Electrics power generation system in support of government policy.

    To explore the introduction of commercial scale solar energy project following the success of commissioning the first wind turbine in providing green electricity.

    To partner with DuPont Apollo Limited in studying the feasibility of installing large scale PV System in Lamma Power Station.

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    Site Selection - ConsiderationsLarge flat area for solar PV installation on ground or roof topThe total weight of solar panels and supports against allowable roof loadingOrientation of solar panels facing south and tilted at 22Full utilization of sunlight with no shadingVisual impactEase of grid connectionAccessibility for operation & maintenance

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    Site Selection - Installation Locations5 groups on rooftops of Main Station Building & 1 group near C.W. Intake no. 2

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    Amorphous silicon photovoltaic module 5,500 piecesTotal Area of PV modules 8470 mMaximum output of each PV module 100 WTotal installed Capacity 550 kWCapacity Factor 12.9%Anticipated power output 620,000 kWhDesign life 20 yearsProject Cost HK$23 millionAmorphous Silicon Thin Film PV System Technical Information

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    Amorphous Silicon Thin Film PV System Characteristics and Benefits1.Use less energy for productionThe more silicon is used for production of PV panels, the more energy is required. Thin film PV technology uses less silicon. Thickness is only about 1/200 of that for crystalline PV module. 2.More suitable in tropical environmentThin film PV maintains better power output level at high temperature than crystalline PV.3.Better weak light performanceThin film PV modules are able to effectively produce power at low irradiance conditions.

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    Amorphous Silicon Thin Film PV System Power output in response to solar irradiance variation Power Output: 18/7/2010 (Sunny) 3,582 kWh, 22/7/2010 (Cloudy & Rainy) 1,258 kWh

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    Fully Automatic OperationWith solar irradiance of 100 W/m and the output voltage of PV string at 360V, the system connects to the grid automatically.

    Simple MaintenanceGeneral cleaning required under normal circumstances.Power output not affected even with minor cracks on surface of PV modules.Amorphous Silicon Thin Film PV System Operation & Maintenance

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    Environmental BenefitsReduce 520 tonnes of CO2 emission per annumReduce 2.9 tonnes of SO2 emission per annumReduce 1.4 tonnes of NOx emission per annum

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    Challenges1.Retrofitting large scale solar power system in existing power plant locating large flat areas without any shade to set up PV modules, while not affecting plant operations.

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    Challenges2.Mounting the PV panels firmly at the selected sites without damaging water-proofing layers on rooftops and wind pressure on PV panels.

    TypicalHK Electrics Solar Power SystemMounting of modulesMetal structure fixed by anchored boltsConcrete blocks freely stand on the roof to avoid damage to water-proofing layersWind Pressure2.4 kPa / m

    (No stiffeners)5.6 kPa / m(Stiffeners added)

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    Challenges3.Delivering large quantities of equipment and materials to rooftops.11,000 concrete blocks for fixing of PV modules5,500 Solar Panels47 PV inverters, 47 combiner boxes, 25 Electrical and instrument panels100,000 metres of cables and cable supports 21,888 angle steel brackets for fixing of PV modules onto the concrete blocks250 Ton crane for lifting of materials to EL+80.15 roof areas

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    4 9/2009Site investigation and study

    10 & 11/2009Tendering

    12/2009 3/2010Design

    4 6/2010Construction, testing & commissioning

    End 6/2010Project Completion

    Project Schedule

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    Summary and Way ForwardIt is the largest solar energy system in Hong Kong.More solar panels are planned to be installed on the rooftops of the New Store Building and existing 275 kV Switching Station. The long term target is to expand the total capacity of the system to 1 MW.

    550 kWLamma Power StationCompleted in 2010Amorphous Silicon Thin Film350 kWEMSD HeadquarterCompleted in 2005Crystalline Silicon 198 kWHong Kong Science ParkCompleted in 2005Crystalline Silicon

  • Thank You

    *Content of the presentation fileTo brief background of the PV projectTo brief the selection criteria of suitable site for the PV SystemTo brief the selected locations in Lamma Power Station for the PV SystemTo point out the performance of the PV SystemHaving reviewed the pros and cons of crystalline and thin film together with their derivatives, amorphous silicon thin film PV modules are selected as they are considered more environmentally friendly in production and are the more cost competitive for application especially in tropical areas due to an anticipated better performance in electricity production per year.To indicate annual emission reduction.To brief the major differences in design of the PV System in Lamma Power Station with typical PV SystemTo show the time line of the PV project and project cost.To mention that the PV System in Lamma Power Station becomes the largest PV System in Hong Kong. The 2nd and 3rd largest system in Hong Kong also included for comparison.