SOLAR SOLUTIONS FROM FOR PROPERTY DEVELOPERS By Vickrogers Macharia
SOLAR ENERGY PRINCIPLES Energy emitted by the sun Measure in watts/m 2, at standard testing conditions max solar irradiance = 1000w/m 2 Converted to thermal (e.g solar water heaters) and electrical (e.g. Photovoltaic modules) energy Energy optimised by tracking sun s E-W axis Varies throughout day and year 2
SOLAR ENERGY BASICS Solar Energy Thermal Energy Electric Energy Solar Hot Water Systems Solar Power And Lighting Systems Solar Water Pumping Systems 3
LOCAL EXPERTISE Global Network
DAYLIFF SHW SYSTEM Operating Principle A solar collector heats water which is stored in a close coupled tank. Heating process enhanced by thermosyphon principle which occurs when there is a temperature differential in the system 5
HOT WATER DEMAND CALCULATIONS Type of Building Premises Domestic residential houses Educational Institutions such as colleges and borading schools Health Insitutions such as Hospitals, Health Centres, Clinics and similar medical facilities Hotels, Hostels, Lodges and similar premises providing boarding services Restuarants, Cafeterias and similar eating places Laundries Specific Daily Hot Water Demans (DHWD) in Litres per day at 60 ºC 30 per person 5 per student 50 per bed 40 per bed 5 per meal 5 per kilo of clothe 6
ULTRASUN PREMIUM SOLAR HOT WATER SYSTEMS Manufacturer: Bural, Turkey High specification thermosyphon type Options are available for Open Closed Loop Heavy duty tank which includes a steel powder coated outside casing, steel storage tank internally coated with glazed enamel & fitted with a magnesium sacrificial anode for exceptional corrosion protection, UV resistant plastic end caps and a 2kW heating element with thermostat. Solar collectors that incorporate full area copper absorption plates Available in 150L, 200L & 300L
ULTRASUN SOLAR HOT WATER Manufacturer: Sunrain, China SYSTEMS Economical effective heaters that provide excellent performance, good value and guaranteed long life Open Loop thermosyphon design Heavy duty stainless steel tank with 2kw electric heater, thermostat a sacrificial anode to protect against corrosion Ultra high efficiency solar collectors incorporating capillary copper pipes Galvanised mounting frame Available in 150L, 200L & 300L
DAYLIFF SOLAR HOT WATER SYSTEMS Manufacturer: Collectors from Sunrain, China & Dayliff locally manufactured tanks Open Loop thermosyphon design Heavy duty tank that features a resin insulated totally weather proof GRP casing a heavy duty galvanized cylinder C/W Magnesium Anode An in-built 3kW electric water heater with thermostat Capacity: SWD160S, SWD160L, SWD220S, SWD220L, SWD320S & SWD320L
ULTRASUN VACUUM TUBE HOT WATER SYSTEMS Manufacturer: Sunrain, China Vacuum Tube SHW systems are the most efficient water heating systems available Solar energy is captured in the vacuum sealed glass tube, quickly heating the water in the copper heat pipe The heated water rises to the top of the pipe and collects in the tank. Capacity: Hot water 200litres Vacuum tubes: 20pieces Mounting: Flat roof mounting set
COMMERCIAL SOLAR HOT WATER Long life free standing tanks magnesium anode-rod protection High performance circulator pump advanced programmable controller Commercial Solar Water Heaters Available in 1,000L, 1500L, 2000L Domestic Vertical Solar Hot Water Heaters Available in 150L, 200L, 350L & 500L
E-zinc Electronic Solar Controllers Main Functions: Time and temperature display Timing heating at three time sections Manual heating activation Control thermostat when heating Memory protection on power failure Trouble indication sensor STDC Version 1 3 temperature sensor inputs 1 relay output 230VAC (on/off) 12
NEW GOVERNMENT POLICY Policy Framework on Solar Hot Water Systems (SHW) To enforce usage of SHW in all new buildings To amend building by-laws to make it mandatory in urban areas to include SHW in building designs Regulations for Residential & Commercial Buildings All new and existing buildings where hot water requirements >100litres/day shall incorporate a SHW system 13
SUCCESSFUL SWD PROJECTS Morello Girls High School: 10No. SWD320L Solar Hot Water Installations 14
SUCCESSFUL SHW PROJECTS Parklands Apartments :24No. 320L SWD systems 15
SUCCESSFUL COMMERCIAL SOLAR HOTWATER PROJECTS 6,000Litres Commercial Solar Hot Water System, Human Needs Project, Kibera 16
ADVANTAGES OF SHW SYSTEMS Huge Energy Savings Payback of less than 2years Uses abundant free solar energy Abundant Hot Water 24 hours a day Huge Environmental benefits Long lifespan over 20years Maintenance-free System 17
Basic Components of PV System
SOLAR PV CELL PRICING Average global PV module price < 1$/Watt in 2014, D&S pricing at KShs115/watt Reduction in production costs Increased competition & production New technologies, growth of production capacity and better production processes Improve the cell conversion efficiencies. 19
PV BUSINESS OPPORTUNITIES PV Applications Grid feed-in Off-grid Water Supply Public grid Diesel grid Street lighting Telecom power supply Solar Home Systems Water pumping Water desalination etc. Backup systems village power supply 20
SUCCESSFUL PROJECTS 8KW solar lighting system in Turkana 21
WRIGLEY SOLAR POWER SYSTEM 22
GRID CONNECT PV SYSTEMS Two configurations are possible: Grid Connect: Connection of PV and loads via an AC Bus for utility connected systems Connection of PV Array and load via an AC Bus with battery back-up PV PV String inverter e.g. SMA Sunny Boy AC load AC-bus Bidirectional battery inverter e.g. SMA Sunny Island Back up Generator Battery Bank Solar battery 23
24 GRID CONNECT PV SYSTEMS
CALCULATING INTERNAL CONSUMPTION Base load
SMA GRID TIED INVERTERS 1. Sunny Boy Series: SB2500 SB5000 (2.5kW 5.0kW) single phase 2. Sunny Tri Power: STP5000TL STP25,000TL (5kW 25kW) 3 phase Features: Easy installation Easy setup to on/off grid mode Multiple MPPT capability (depending on model) Plant monitoring capable via RS485/Bluetooth 26
OFF GRID INVERTERS/BACK UP SYSTEMS 1.Sunny Island: SI 6.0H & SI 8.0H 6kW & 8kW Features: Integrated data logging Grid/Generator back up connection possible Bi-directional inverting Frequency control MPPT controller 27
SMA GRID CONNECT INVERTERS 28
DATA LOGGING SMA provides various methods to monitor the status of your plant in the comfort of your office/home. Various methods of connection: - Bluetooth - RS485 - Ethernet - GSM Capability of making system changes via webbox 29
HO 5KW GRID CONNECT SYSTEM 1. Sunny Boy: 5048, 5kW 2. 20No. 250W SolarWorld Modules 3.Webbox for monitoring and making system changes Hourly Performance Daily Performance 30
HO 5KW GRID CONNECT SYSTEM Monthly Performance Yearly Performance 31
POWER BACKUP SYSTEMS 32
POWER BACKUP SYSTEMS OPTI Inverter/Charger Batteries Change Over switch AVS
ADVANTAGES OF P.B.S Standby power in event of mains power failure Alternative to a generator Instantaneous & automatic changeover when the mains power fails Totally silent and non-polluting operation Very low running costs just the power to charge a battery 34
MODULAR SOLAR STREET LIGHTS Separate components as follows:- High brightness Dayliff Nande 40/60W LED lamp unit mounted IP65 aluminum housing. Dayliff Crystalline PV modules. Champion VRLA sealed solar battery. Lockable waterproof battery box Controller to regulate system operation and automatically switch the lamp at dusk and dawn. Rigid steel 6m high x 2½ mounting pole that incorporates panel mounting frame, lamp mounting arm, necessary wiring and mounting plates.
COMPACT ALL-IN-ONE SOLAR STREET LIGHTS All-in-One units incorporate all components of the lighting system into one complete assembly Provides many advantages in terms of simplicity of installation, reliability and security The assembly includes:- LED lamp, crystalline PV module, 12V Lithium battery, Intelligent multi-function controller that provides compact regulation and automatic lamp switching at dusk and dawn Assembly mounted on a 6m high x 2½ PI pipe to which the lamp assembly is simply bolted.
SUCCESSFUL PROJECTS Dayliff Solar Street Lights in a gated estate in Karen Nairobi, 37
Questions?