SOLAR THERMAL WATER HEATING SYSTEMS

WATER HEATING PRODUCTION SYSTEM

THIS ONLINE SIMULATION SOFTWARE ALLOWS MAKING PROFITABILITY STUDIES OF SOLAR THERMAL WATER HEATING SYSTEMS (STWH), WHICH IMPLIES THE SIZING OF THE MAIN COMPONENTS IN THIS FACILITIES AND PERFORMING THE SIMULATION IN ORDER TO OBTAIN THE ENERGY PRODUCTION FOR ONE WORKING YEAR. ONCE THE MAIN COMPONENTS ARE KNOWN THE IMPLANTATION COST CAN BE ESTIMATED SO KALKENER WILL BE ABLE TO CALCULATE THE KEY PROFITABILITY INDICATORS. THIS SOFTWARE FOCUSES IN AN ACCURATE SIMULATION OF THE ENERGY PRODUCED STUDYING ONLY THE MOST PROFITABLE CONFIGURATION SO, SHOULD THE PROTITABITITY WERE NOT ENOUGH IN THIS CASE, NEITHER THERE WILL HAVE SENSE TO STUDY OTHER MORE COMPLICATED CONFIGURATIONS NOR TO WASTE TIME AND RESOURCES WRITING UP IMLEMENTATION PROJECTS.

DOWNLOAD THE COMPLETE TUTORIAL FOR THIS CALCULATING MODULE

SOLAR THERMAL WATER HEATING SYSTEMS

WATER HEATING PRODUCTION SYSTEM

EITHER GIVEN HORIZONTAL OR SLOPED ROOFS, THE USER WILL BE ABLE TO:

• TAKING IN ACCOUNT THE SLOPE AND ORIENTATION OF THE ROOF KALKENER CALCULATES THE SOLAR COLLECTORS' OPTIMAL POSITION, REFERENCED TO THE ROOF, IN ORDER TO MAXIMIZE THE RECEIVED SOLAR RADIATION
• SIMILARLY, IN CASE THAT SOLAR COLLECTORS WERE PLACED IN A PARTICULAR POSITION ON THE ROOF, THE ORIENTATION AND TILT LOSSES HAVE TO BE CALCULATED RELATED TO THE OPTIMAL POSITION

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STEP 1

KALKENER DRAWS THE SOLAR CHART ACCORDING TO THE LATITUDE WHERE THE FACILITY IS PLACED. BESIDES:

• YOU CAN SET YOUR OWN VALUES OF SOLAR RADIATION ON THE HORIZONTAL PLANE, COLD WATER INLET TEMPERATURE, AVERAGE DAYTIME TEMPERATURE, THE CUADRATIC YIELD EQUATION, ETC.
• THE PERIOD OF OPERATION OF THE FACILITY: YOU CAN SET THE MONTHS IN WHICH THE CONSUMPTION OF HOT WATER IS EXPECTED

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STEP 2

ONCE THE SOLAR SITE SURVEY (CONTOUR OVER THE SOLAR CHART OF THE SHADOW CAST BY THE OBJECTS THAT SURROUNDS THE FACILITY ) HAS BEEN SET BY THE USER IN CARTESIAN COORDINATES, KALKENER WILL CALCULATE THE ANNUAL SHADING LOSSES

• CLICKING ON THE NEX LINK YOU WILL FIND A TUTORIAL THAT EXPLAINS HOW TO DEFINE THE SOLAR SITE SURVEY
• KALKENER CALCULATES THE SHADING LOSSES THROUGH ANALYTICS METHODS, WITHOUT ANY SUBJECTIVE INTERPRETATION

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STEP 3

NON-CONSTRAINED INPUTS:

• YOU CAN SET THE COEFICIENTES OF THE CUADRATIC YIELD EQUATION ACCORDING TO THE AVERAGE TEMPERATURE IN THE COLLECTOR (remember that the manufacturer provides these values according to homologated tests)
• YOU CAN CHOOSE HOT WATER CONSUMPTION PROFILES CLASSIFIED BY MONTH, WEEK AND DAY (remember that when only the monthly consumption profile is set, then you are assuming the risk of inaccurate calculations)
• YOU CAN SET YOUR OWN HOT WATER CONSUMPTION PROFILES CLASSIFYING THEM BY MONTH, WEEK AND DAY
• KALKENER PERFORMS A DYNAMIC, DETERMINISTIC AND DISCRETE SIMULATION BY ASSUMING THE OPERATION OF THE STWH DURING ONE YEAR

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STEP 4

• THE MANUFACTURER AND MODEL OF SOLAR COLLECTORS CAN BE CHOSEN FROM AN SPECIFIC DATABASE BUT IT IS POSSIBLE TO SET YOUR OWN YIELD COEFICIENTS AS WELL
• SIZING OF SOLAR STORAGE TANK AND POWER OF THE PLATE HEAT EXCHANGER
• FEATURES OF BACK-UP HEATING SUPPLY SYSTEM (POWER, HOT WATER STORAGE TANK AND THE EXPECTED ENERGY-REFILL TIME
• PERCENTAGE SOLUTION OF ANTIFREEZE REQUIRED IN THE PRIMARY LOOP
• KALKENER CALCULATES DE NUMBER OF SOLAR COLLECTORS NEEDED IN ORDER TO REACH THE SOLAR FRACTION DESIRED BY THE USER

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STEP 5

• HYDRAULIC SCHEME USED: COLLECTIVE SOLAR HOT WATER HEATING SYSTEM
• KALKENER GIVES A RECOMMENDED VALUE FOR THE SOLAR FRACTION (the amount of used energy provided by the solar technology divided by the total energy required) BUT THE USER CAN CHOOSE THE DESIRED VALUE
• THE BACK-UP HEATING SUPPLY ENERGY TO GARANTIZE THE TOTAL ENERGY REQUIERED IN ABSENCE OF SOLAR RADIATION IS CALCULATED
• THE ENERGY LOSSES (NON-USED ENERGY) IN CASE OF OVERPRODUCTION ARE CALCULATED
• THE ELECTRICAL CONSUMPTION RELATED TO THE STWH OPERATION IS CALCULATED

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STEP 6

ONCE KALKENER HAS CALCULATED THE COMPONENTS OF THE STWH AND THE USER HAS ENTERED ITS ESTIMATED IMPLEMENTATION COST, KALKENER FIGURES OUT THE KEY PROFITABILITY INDICATORS: ACCORDING TO STATIC (Return of investment) AND DINAMIC (NPV and IRR) CALCULATION METHODS. TO MAKE THIS CALCULATIONS KALKENER TAKES INTO ACCOUNT THAT:

• THE COST OF THE STWH ELECTRICAL CONSUMPTION
• NON-ENERGY EXPENDITURES: MAINTENANCE, INSURANCE, FINANTIAL, ETC.

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STEP 7

IT IS POSSIBLE TO DOWNLOAD A REPORT THAT SUMARIZES THE INPUT DATA AND THE RESULTS CALCULATED BY KALKENER, IN BOTH FORMATS .PDF AND .DOCX (EDITABLE FORMAT)