| Title |
The borehole heat transfer model performance analysis in multi-layer Quaternary sediments and evaluation of thermal conductivity parameters using PSO algorithm / |
| Translation of Title |
Įvairiasluoksnių kvartero nuogulų šilumos perdavimo modelis ir šilumos laidumo parametrų vertinimas vertikaliais šilumos kolektoriais. |
| Authors |
Indriulionis, Audrius |
| Full Text |
|
| Pages |
63 |
| Keywords [eng] |
BHE ; TRT ; g-functions ; PSO |
| Abstract [eng] |
The growing need for low-energy or 'green' buildings and the commitments from the European Union are encouraging the use of renewable energy from 17% to 30% in 2030. The potential of shallow geothermal energy has not been studied by researchers because of no qualitative scientific in-situ thermal response test reference data sets. The qualitative borehole heat exchanger analysis could be performed while the hydrodynamic and thermal parameters of the rocks are determined by the laboratory experiments. The advanced particle swarm optimization algorithm is effectively applied to evaluate the thermal conductivity parameters of rocks. The heat transfer simulation was performed using different analytical g-functions. Stability conditions for the TRT experiment have been established to ensure the accuracy of the thermal parameter estimates. The uncertainty of parameters was performed to obtain the effects on stability and accuracy of thermal parameter estimates. The borehole heat transfer analysis was established for multi-layered Lithuanian Quaternary sediments, incorporating parameters of porosity, groundwater filtration and hydraulic gradient characteristic of the surrounding Visoriai area. An impact analysis was performed on the average temperature of the circulating fluid, changing the hydrodynamic parameters of the multilayer Quaternary sedimentscolumn. The thesis presents an expert analysis of TRT experimental equipment produced in Lithuania following confidentiality agreements. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Summaries of doctoral thesis |
| Language |
English |
| Publication date |
2019 |
