1.9.5.1.The results of simulation
There are few possible form to view results of simulation. They are:
Results overview – annual values of basic parameters
Financial analysis – system calculates economical data like a energy cost savings, payback period, reduction in CO2 emission etc. ,
System results – more detailed analysis, annual and monthly values presented in tabular form and graph;
Components results – detailed analysis of each component of the system;
Tabular evaluation – hour by hour presentation of parameters in tabula form;
Graphical evaluation – an user can prepare his own graphs, fluid overview – the overview of the fluids used in the system;
Energy flow diagram – annual energy balance presented in the form of flow diagram;
Results analysis – the data is presented directly on the system diagram window. With the use of slider the user can preview data for each step of analysis.
Results overview
An example window of “Results overview” is presented on the figure below. The user can see annual values of basic parameters presented in the tabular form. The graph of annual and monthly values is displayed for selected parameter. The user can print displayed window or export results to the text-type file.
Fig.1.9.9 An example window of ‘Results overview’ function.
In details, the parameters presented on the given example are:
SFn - net solar fraction, a solar energy fraction supplied to the system; εsys – the ratio of total energy consumed by load ie. hot water Quse to the total energy consumed by the system Etot, the higher value of εsys means better system; Qsol, Qaux – energy supplied to the system by the solar collector and heat generator respectively; Qdef – deficit of energy (difference between demanded and produced energy).
System results
The function “System results” gives more detailed than “Results Overview” analysis of system parameters. Similarly as above, the user can print displayed window or export data to the text-type file.
Components results
With this function the user can prepare very detailed analysis of each component of designed system.
Tabular evaluation
With this function the user can preview hourly data of chosen parameters. A data presented on the Table is fully editable only on Designer level of POLYSUN. In Educational and Professional version of POLYSUN a data can be only previewed. To export parameter(s) the user can select data by the click (next click for deselect) on desired column and copy data to the clipboard (CTRL+C) and next paste data (CTRL+V) to the spreadsheet or notepad.
Fig.1.9.10 The view of ‘Tabular evaluation’ window (on left). The tree of components. Allows adding of the parameters to the evaluation table (on right).
Graphical evaluation
With the use of “Graphical evaluation” function the user can
create his/her own graph. An example window of that function is
presented in the picture below. The main field of the window is
reserved for the graph (1). The data presented in the graph can be
moved and scaled with the use of buttons (2). To choose a given week
of the year or month the selectors (3) are used. To add or delete a
curve the buttons (4) are used. In area (5) the list of displayed
data is presented. The color and type of line of each curve can be
changed. The graph can be printed
or saved to *.png file
.
Fig.1.9.11 An example window of „Graphical evaluation” function. Hot water demand temperature and collector mean temperature on June are displayed on the graph.
Fluid overview
This view shows in the form of tree which fluid flows throw which
loop. On the example window we can distinguish three loops – heat
generator, user’s circuit and solar circuit. For each loop the type
of the fluid used is shown on the top of branch tree. With the button
the user can change the parameters of the fluid.
Fig.1.9.12 An example window of „Fluid overview” function (on the left). The components of each hydraulic loop are displayed. The parameters of fluid used in system can be changed – see window on the right.
Energy flow diagram
Energy flow diagram shows the annual balance of the energy. The sum of solar energy supplied to the system and total energy consumed by heat generator and other devices (e.g. pumps) to the sum of energy of consumed hot water and inside/outside lost energy.
To check the balance let’s make calculation:
Left side- 2154kWh+2666kWh+10kWh=4830kWh
Right side – 3448kWh+137kWh+1246kWh=4831kWh
The small difference between left and right side of balance is the result of the rounding of numbers.
Simulation analysis
Using the function “Simulation analysis” user can preview the parameters of the system for each step of simulation directly on the diagram window.
Fig.1.9.13 An ex ample window of „Results analysis” function.
Financial analysis
POLYSUN contains a financial calculator. Making a financial analysis the user obtain information about annual energy cost savings, solar energy costs, payback period and present value of the system. The financial calculator takes into account such parameters as a maintenance costs, life span, incentives and energy prices. The calculator is made forecasts on the assumption of inflation, interest rates and energy prices.