Soojussalvesti energiabilanss
Laen...
Kuupäev
2015
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Soojussalvestussüsteemides, kus soojusenergiat tootvaid ja kasutavaid seadmeid on palju ning
soovitakse ülevaadet kogu energiabilansist, tuleb paigaldada mõõteseadmed kõikidele
akumulaatori sisenditele ja väljunditele. Alternatiiviks on soojussalvesti pinna keskmise
temperatuuri mõõtmine. Kõige lihtsam on seda teha akumulaatorile kleebitud peenikese
vasktraadi abil. Antud mõõtmisviis muudab energiabilansi leidmise lihtsaks ja mugavaks.
Käesoleva magistritöö eesmärk on selgitada välja, kas soojussalvesti energiabilanssi saab
leida akumulaatorile kleebitud peenikese vasktraadi abil ning milline on selle meetodi täpsus
ja tulemuste kasutusvõimalused.
Tulemuseni jõudmiseks katsetatakse patenteeritud mõõtesüsteemidel põhinevat
mõõtelahendust, kus ühe peenikese vasktraadi abil mõõdetakse akumulaatori keskmine
temperatuur ning selle muutuse kaudu ajas arvutatakse sisenev ja väljuv soojusenergia. Katse
teostati käesoleva magistritöö autori kodus ja Eesti Maaülikooli katelseadmete laboris
vesitüüpi akumulatsioonipaagi näitel.
Magistritöö tulemusel selgus, et katseobjektiks oleva 1400 l akumulatsioonipaagi
pinnatemperatuuri leidmiseks piisab 0,7 mm läbimõõduga vasktraadi kasutamisest.
Mõõtetäpsus võimaldab jälgida 0,16 kW∙h energia muutust süsteemis. Mõõtetulemusi saab
edukalt rakendada soojussalvesti energiabilansi leidmisel.
If there’s a number of the thermal energy producing and using equipment and an overview of the entire energy balance is requested, then the measuring equipment should be installed for all inputs and outputs of an accumulator. The alternative is to measure the average surface temperature of an accumulator. The average temperature of the heat storage tank can be measured by using a thin copper wire on an accumulator surface. This measuring method would make it easy to find the accumulator’s energy balance using the average temperature of the tank. The aim of the thesis was to find out whether the energy balance of the accumulator can be measured by using a thin copper wire on an accumulator surface, and what is the accuracy of the method and which are the possibilities to use the results. In experiment there were used measuring systems which are based on patented measuring systems, where the average temperature of the heat storage tank is measured by using a thin copper wire and incoming and outgoing heat energy can be calculated by the change in the average temperature in the time. The experiment was carried out the thesis author’s home and in the Estonian University of Life Sciences boiler equipment laboratory, based on water-type accumulator. The result of the thesis revealed that for average temperature measurement of the heat storage tank, capacity of 1400 l, it is sufficient to measure the average temperature with the copper wire which diameter is 0,75 mm. Accuracy of measurement allows to track 0,16 kW∙h change in the energy system. The results of measurements can be successfully applied to find out the energy balance of the heat storage tank.
If there’s a number of the thermal energy producing and using equipment and an overview of the entire energy balance is requested, then the measuring equipment should be installed for all inputs and outputs of an accumulator. The alternative is to measure the average surface temperature of an accumulator. The average temperature of the heat storage tank can be measured by using a thin copper wire on an accumulator surface. This measuring method would make it easy to find the accumulator’s energy balance using the average temperature of the tank. The aim of the thesis was to find out whether the energy balance of the accumulator can be measured by using a thin copper wire on an accumulator surface, and what is the accuracy of the method and which are the possibilities to use the results. In experiment there were used measuring systems which are based on patented measuring systems, where the average temperature of the heat storage tank is measured by using a thin copper wire and incoming and outgoing heat energy can be calculated by the change in the average temperature in the time. The experiment was carried out the thesis author’s home and in the Estonian University of Life Sciences boiler equipment laboratory, based on water-type accumulator. The result of the thesis revealed that for average temperature measurement of the heat storage tank, capacity of 1400 l, it is sufficient to measure the average temperature with the copper wire which diameter is 0,75 mm. Accuracy of measurement allows to track 0,16 kW∙h change in the energy system. The results of measurements can be successfully applied to find out the energy balance of the heat storage tank.
Kirjeldus
Märksõnad
magistritööd