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Parallel and Series Circuits Worksheets document sample
Parallel and Series Circuits Worksheets document sample
Worksheet 1: Daily System Energy Requirement Use this worksheet to calculate the energy which must be supplied by the array each day to power all of the lights and appliances in your system 1. Calculate the total daily load energy demand using the table below Column A Column B Column C Column D Column E Lamp or Appliance Voltage Power Daily Use Daily Energy Use (DC) list below volts watts hours watt hours DC Appliances 0 0 0 0 0 0 0 0 0 0 AC Appliances Centrifuge 240 200 0.5 HIV Testing 240 300 1.5 Laptop computer 240 30 8 Printer 240 20 0.5 Copier 240 600 0.5 Refrigerator 240 60 6 Video/TV 240 120 2 Admin block lights (8 * 10W) 240 80 4 Maternity lights (4 * 15W) 240 60 2 Ward lights (4 * 8W) 240 32 3 Security (4 * 15W) 240 60 6 Cell phone recharging 240 40 8 BOX G: Total Daily DC Energy Demand 0 BOX H: Total Daily AC Energy Demand 2. Estimate system energy losses Box I: DC losses 0 Energy is always lost due to inefficiencies in cables Box J: AC losses modules, batteries, charge controllers and inverters. The extra amount of energy lost must be estimated and added to the daily energy demand. 3. Add AC & DC Demand and AC & DC Losses Box K: Total Daily For DC power multiply Box G by 0.20 System Energy Requirement For AC power multiplyBox H by 0.35 4. Select System Voltage Box L: System Voltage 24 volts 5. Calculate Daily System Charge Require Divide Box K by the system voltage in Box L Box M NB The following shades indicate how cells should be used Enter data in this cell See text for a description of this cell This cell contains a calculation and is locked Worksheet 2: Sizing and Choosing the Modules Use this worhsheet to calculate the size of array in your system Step 1: Obtain your site's insolation value Estimated annua Do you have Column F meteorological data? insolation psh Daily Energy NO Use (AC) watt hours YES Box 2A Solar Records Mean insolation data should be Select the lowest filled below. montly insolation figure Month Peak Sun Hours Jan 4.87 Feb 4.82 Design Month ps Mar 5.19 Apr 5.43 0 May 5.42 100 Jun 5.23 450 Jul 5.19 240 Aug 5.13 10 Sep 5.07 300 Oct 4.71 360 Nov 6.03 240 Dec 5.22 320 AVG 5.19 120 96 Box 2C Box 2D 360 320 164.025 5 Daily System Design Solar Watt-hours Charge Requirement Insolation Value 2916 Wh Amp-hours Peak sun hours From Worksheet 1 Wh BOX M 1020.6 Wh Step 4: Select enough modules Details of Selected Module to produce the design charging current.Company mand and AC & DC Losses Use the manufacture's data Peak watts otal Daily (I-V curve & temperature data). Rated voltage 3936.6 Wh Rated current Step 5: Draw the configuration of Current at NOCT the module array Number of modules required y System Charge Requirement e system voltage in Box L 164.025 Ah Insolation in kWh/m2/day/month w cells should be used ription of this cell calculation and is locked e Modules Worksheet 3: Battery Sizing and Selection Use this worksheet to select your battery and charge controller BOX 2C Step 1: What type of battery will you use? Estimated annual Shop around to get an idea of the batteries available Type of Battery Voltage insolation psh Modified SLI (Portable) Traction Battery Lead Calcium Maintenance Free Captive Electrolyte Gel Cells Absorbed Glass Mat Tubular Plate Batteries Step 2: Select Design Solar Other Insolation Value Step 2: Calculate the capacity required capacity of your battery in amp hours. BOX 2B Box 3A Design Month psh 164.025 5 Daily System Reserve Days Charge Requirement Amp-hours From Worksheet 1 BOX M Step 3: Determine the battery configuration Step 3: Calculate the design Step 4: Does battery charging current require special Box 2E charge control setting? 32.81 Step 5: Determine your battery cycle life and sign Solar System Design maintenance needs. lation Value Charging Current ak sun hours Amps Maintenence needs Topping up YES Cleaning corrosionYES Equalizing YES etails of Selected Modules Check SoC YES BP 790 BP Solar 90 ted voltage 24 ted current 5 Expected rrent at NOCT 5.3 Life Cycle umber of modules required 6.19 attery Sizing and Selection Worksheet 4: Charge o select your battery and charge Use this worksheet to size a controller and inverter of battery will you use? Charge Controller Sizing an idea of the batteries available (see Tabe 4.3) Step 1: Select Charge Co Capacity Recommended Recommended Price Cycle Life @ Daily DoD (%) Max DoD (%) 25% DoD Array Input Rating Box 4A 50% 63.60 Maximum Array Short Circuit Current Amps Step 2: Select Desired CC the capacity required capacity Shop around to get an idea amp hours. Controller Specification Box 3B Box 3C Box 3D Rated Voltage Maximum Array ISC Input 2 0.5 656.1 Maximum Load Output Reserve Days Maximum DoD Required System Self Consumption Minimum 1 Express as decimal Battery Capacity Feature Maximum 4 (ex. 30% is 0.30) Amp-hours High voltage disconnect Low voltage disconnect Make a drawing of battery configuration/voltage Temperature compensation Indicate the voltage and parallel/series connections Load timer Displays Solar charge indicator YES √ SoC indicator (LED) NO ☐ LCD display Amp hour meter Inverter Sizing and Selec Details of Selected Battery Step 1: Is an Inverter N How often Company Trojan Step 2: Inverter/Charge Monthly Model L16RE-2V Step 3: Inverter & Charg Monthly Type Flooded Box 4E Quarterly C20 Capacity Ah 1200 Ah 1602 Weekly Individual Battery Voltage 2V Battery Bank Voltage 12V Watts Number in series 6 Number in parallel 1 Rated Charge Current Cycles Total number of batteries 6 For battery charging (A) (Days) Total battery capacity 1200 Accepts power from: Rated cycle life @ 25% DoD orksheet 4: Charge Controller/Inverter Sizing and Selection e this worksheet to size and select your charge ntroller and inverter harge Controller Sizing and Selection ep 1: Select Charge Controller Size ray Input Rating DC Load Output Current Rating Box 4B Box 4C Box 4D x 1.25 = 79.5 0.0 x 1.25 = 0.0 aximum Array Array Input Rating Maximum DC Load Load Output hort Circuit Current Amps Rating Amps ep 2: Select Desired CC Features op around to get an idea of the charge regulators available (see Table ) ontroller Specification Rating Protection YES/NO ted Voltage V See Box L Short circuit protection (array) aximum Array ISC Input A See Box 4B Short circuit protection (load) aximum Load Output A See Box 4D Reverse polarity (array) lf Consumption mA Reverse polarity (load & battery) YES/NO Lightning protection gh voltage disconnect Open circuit battery w voltage disconnect Sealed battery charge settings mperature compensation YES/NO Desired Charging Type YES/NO lar charge indicator Pulse Width Modulation C indicator (LED) Equalization MPPT mp hour meter Other verter Sizing and Selection YES/NO ep 1: Is an Inverter Needed? YES Only if 230/110 VAC appliances are used. ep 2: Inverter/Charger? YES Only if a charging source is available ep 3: Inverter & Charger Rating Step 4: Select Desired Inverter Features Box 4F Details of Desired Inverter x 1.25 2002.5 Continuous Power (W) Inverter Rating Peak Surge Power (W) Watts Input DC Volts Output AC Volts ated Charge Current Box 4G Wave shape r battery charging (A) Efficiency cepts power from: Genset/wind/solar Self-Consumption (A) Select appropriate choice Low Voltage Disconnect (V) Worksheet 5: Wiring, Voltage Drop and Fuses Use this worksheet to size and select your electrical accessories Step 1: Map the Site and Estimated Cable Runs Draw a scale map of the site and estimate the distance of all cable runs, including from the modules to the control, the control to battery and the circuits. Note the locations of each lamp, socket, switch, junction box, and fuses. Note the voltage of major circuits. Step 2: Determine the proper cable sizes to avoid voltage drop See Chapter 7 for instructions on the use of the table below. Column A Column B Column C Column D Column E Column F Cable Run (List Circuits) Distance of Maximum K Value of Total Voltage Drop Cable (m) Current (A) wire Resistance (V) (ohms/m) (ohms) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Make sure all voltage drops are less than 2%! Step 3: Sizing Fuses and Circuit Breakers Step 4. List all electrical See Chapter 7 for detailed instructions on sizing fuses accessies required. • List circuits to be protected in Column A • Cables (all sizes & types) • Write each circuit's maximum power drawn (W) in Column B • Conduit • Calculate each circuits' maximum current (A) in Column C • Switches • Increase the figure by 20% in Column D • Sockets This is the minimum size of the fuse required. • Fuses Column A Column B Column C Column D • Junction boxes Cable Run (List Circuits) Max Rated Maximum Fuse Size (A) Power (W) Current (A) • Connector strips • Lightening protection 0 0 • Grounding/earthing 0 0 • Bolts, screws, nuts, etc. 0 0 0 0 Use the list of electrical accessories to 0 0 make sure you have everything you need before going to site! 0 0 0 0 Column G Voltage Drop (%) 0% 0% 0% 0% 0% 0% 0% 0% 0% than 2%! electrical ectrical accessories to have everything you ng to site!
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