AS Toftani tootmisliini seadmete energiakasutus
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Kuupäev
2014
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Autorid
Ajakirja pealkiri
Ajakirja ISSN
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Abstrakt
AS Toftan on tootmud toormaterjalist saematerjali ligi 20 aastat. Aastas lõigatakse 350 000 m3 toormaterjalist üle 200 000 m3 saematerjali. AS Toftan on tootmismahu suuruselt teine saeveski. Ettevõtte tootmisprotsess koosneb 5 etapist: toormaterjali sorteerimine, saematerjali lõikamine, märja materjali sorteerimine, kuivatamine ja kuivamaterjali sorteerimine. Ettevõtte aastane energiatarbimine on 12 803 MW, võimsustegur umbes 0,90.
Ettevõttes teostati tootmisliini osad elektrimõõtmised. Mõõdeti käivitusmomendid saegrupi mootoritel, tootmisliini osad koormus- ja tühijooksu olukorrad. Palgisorteeri nimivõimsuseks 73 kW, keskmine võimsus töö olukorras 45 kW, elektritarbimine oli 151,8 kWh. Kraana ja koorija elektritarbimine oli 19,4 kWh. Esimese saegrupi võimsus koormusel oli 153,5 kW. Elektritarbimine töö olukorras oli 505 kWh ja käivitamisel 248,8 kWh. Teise saegrupi võimsus koormusel oli 133 kW. Elektritarbimine töö olukorras oli 454 kWh ja käivitamisel 97 kWh. Kolmanda saegrupi kahe mootori võimsus koormusel oli 66,4 kW. Elektritarbimine töö olukorras oli 217 kWh ja käivitamisel 230 kWh Seimri 90 kW mootori keskmine võimsus oli mõõtmise hetkel 17,8 kW, mootori elektritarbimine oli 61 kWh. Mõõdetud seadmete võimsus koormusel oli kokku 424 kW ja elektritarbimine 1417 kWh.
Ettevõtte energiakasutust tuleks kindlasti rohkem uurida, et vältida tulevikus võimalike probleeme ja leida võimalusi energiasäästmisele.
AS Toftan is sawmill which produces lumber in different size. Lumber is used for building houses, window frames, furniture etc. Sawmill produces over 200 000 cubicmeters lumber in one year. The purpose of this thesis is to study the technology of AS Toftan and make conclusions and suggestions in order to save electric power exploitation in the future. Electrical measurements were performed on timber assort line, crane hydraulic and timber peeler electric motors, timber bandsaw electric motors individually and timber edger electric motors. Electric motors were measured at current, voltage, power and energy consumption at load, no load and at the starting point of motors. The sawmill has 12 bandsaws in three different groups, each group has four electric motors in different power. First group is equiped with 90 kW, second group has 75 kW and third group has 55 kW electric motors. The average timber assort line load power was 45 kW and energy consumption 151,8 kWh. First saw group average load power was 153,5 kW and energy consumption 505 kW. The average power of second saw group was 133 kW and energy consuption 454 kW. The average load power in third saw group was 66,4 kW and energy consumption 217 kW. Timber edger energy consumption was 61 kWh. The total load power of AS Toftan measured production line was 424 kW and energy consumption 1417 kWh. In order to save energy in the future the company should change the 90 kW motors for 75 kW in first sawgroup. If there is standstill in the production over 10 minutes, they should turn off the motors to avoid extra power usage.
AS Toftan is sawmill which produces lumber in different size. Lumber is used for building houses, window frames, furniture etc. Sawmill produces over 200 000 cubicmeters lumber in one year. The purpose of this thesis is to study the technology of AS Toftan and make conclusions and suggestions in order to save electric power exploitation in the future. Electrical measurements were performed on timber assort line, crane hydraulic and timber peeler electric motors, timber bandsaw electric motors individually and timber edger electric motors. Electric motors were measured at current, voltage, power and energy consumption at load, no load and at the starting point of motors. The sawmill has 12 bandsaws in three different groups, each group has four electric motors in different power. First group is equiped with 90 kW, second group has 75 kW and third group has 55 kW electric motors. The average timber assort line load power was 45 kW and energy consumption 151,8 kWh. First saw group average load power was 153,5 kW and energy consumption 505 kW. The average power of second saw group was 133 kW and energy consuption 454 kW. The average load power in third saw group was 66,4 kW and energy consumption 217 kW. Timber edger energy consumption was 61 kWh. The total load power of AS Toftan measured production line was 424 kW and energy consumption 1417 kWh. In order to save energy in the future the company should change the 90 kW motors for 75 kW in first sawgroup. If there is standstill in the production over 10 minutes, they should turn off the motors to avoid extra power usage.
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