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| I used Gabi to model small scale thermal energy production in Helsinki Metropolitan Area. | | I used Gabi to model small scale thermal energy production in Helsinki Metropolitan Area. |
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| When you open Gabi, you will see databases which are on use. Databases include all the balances, plans, processes, flows, quantities, units, projects and indicators, which are used in analyzes. You can activate an old database or make a new one.
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| Here's a picture of just activated database and all the variables that can be modified.
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| [[Image:Gabi.JPG]]
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| After activating database it is best to create or activate exiting project. Activating project will save all the changes to plans and other processes to the database. Without project activation you would have to close and activate the database everytime you make changes to variables.
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| Project usually starts up by creating plan, which is basically one part or whole chain of singular processes of the project. Plans can also contain sub plans. Sub plans are used for making the model simpler and understandable. Result of these linked processes and plans, whole production chain should be modeled and every flow in the chain should be in it.
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| When the whole model is ready the program will calculate balance for the model, which tells what kind of inputs and output the whole process has. The results are as reliable as every singular process is, so every single process has to modeled as good as possible to match the real process.
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| I started my assessment for small scale thermal energy production in Helsinki Metropolitan Area project by making Main plan folder for Helsinki Metropolitan Area an in it I put four sub plans for each city in the area (Helsinki, Vantaa, Espoo and Kauniainen). These sub plans consist singular processes as heat demand in the particular area, which determines the heating need for district heating and single-family heating. Because I concentrated in small scale district heating plants and single-family heating, I created single process for over 50 MW district heating plants, which did not have any other outputs than the energy, so they did not have any affect on emissions which are in balance of the model. The only emissions are caused by the small scale district heating plants and single-family heating methods. In addition I added 6th possible nuclear plant process which might come to Loviisa when its thermal heat might be joined to district heating network and thus reducing the heat produced by combustion plants. Heres a pictures of my model, fist picture of main plan, second is Vantaas district heating network plan and third is less than 50 MW plants in Vantaa plan.
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| [[Image:Mainplan.PNG]]
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| [[Image:Vantaaplan.JPG]]
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| [[Image:Under50MWplantsVantaa.JPG]]
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| Helsinki, Espoo and Kauniainen plans have also similar of sub plans, only the amounts of plants and heat production distribution are different. All the variables are bound to heat demand in each area by global parameters. So global when global parameters are changed will also emissions and heat loads change according to the change. Global parameters can be added in the start list global parameters section. I created global parameters for each city in the area. Heres a list of all global parameters I made.
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| [[Image:Globals.PNG]]
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| Balance of the plan will tell how much outputs and inputs the plan has. In other words how much resources and fuel is used to create energy and emissions. For calculating balance, you need to press balance button which is over each plan in the icon row. Heres picture of my main plan.
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| [[Image:Balancebutton.JPG]] ->
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| [[Image:Balance.PNG]]
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| For comparing different scenarios, you need to press Gabi Analyst button which is over the balance sheet in the icon row. Here you can modify parameters and in my project this would allow to handle every possible case for less than 50 MW Helsinki Metropolitan Area district heating plants to year 2020.
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| [[Image:Gabianalystbutton.JPG]] ->
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| [[Image:Gabianalyst.JPG]]
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| ==See also== | | ==See also== |
Gabi 4.3 software is versatile program which can be used for life cycle assessment, cost analysis, efficiency analysis, Global Reporting Initiative-reports (GRI) and companies annual reports. Basic idea is to model all the processes, which are needed to create a product. These processes include all the flows, which are needed for manufacturing the product or which are formed because of manufacturing. Flows are determined in the process, so the can be physical or nonphysical.
I used Gabi to model small scale thermal energy production in Helsinki Metropolitan Area.
See also