The storage of thermal energy within the ground serves as a method to balance irregular consumption for heating throughout year. This principle revolves around accumulation during summer months, allowing its utilization buildings winter months. paper focuses on technique storing heat in ground, known borehole (BTES), via exchangers (BHE), which are designed harness shallow geothermal and cooling purposes. model regenerating rocks, after subcooling could be conducted by solar using panel...

Aquifer Thermal Energy Storage (ATES) systems are a promising solution for sustainable energy storage, leveraging underground aquifers to store and retrieve thermal heating cooling. As the global sector faces rising demands, climate change, depletion of fossil fuels, transitioning renewable sources is imperative. ATES contribute these efforts by reducing greenhouse gas (GHG) emissions improving efficiency. This review uses PRISMA (Preferred Reporting Items Systematic Reviews Meta-Analysis)...

With ambitious targets set by the EU for reduction of emissions from energy sector 2030, there is a need to design and develop more building projects using renewable sources. Even though in Europe, heating cooling share resources increasing, 2021, total this Croatia was at 38%, heat production pumps rather low. One possibility increase install piles when constructing building, which becoming an increasingly common practice. This case study focuses on such system designed large,...

The aim of our research is to use abandoned deep-hydrocarbon reservoirs and dry wells in the Croatian part Pannonian Basin as a geothermal energy source. Croatia has been exploring exploiting hydrocarbon reserves from mid-20th century. Therefore, many oil gas are reaching end their production phase already abandoned. These could be considered for through coaxial heat exchanger principle, which usually used shallow extraction. Using deep well Pčelić located Drava subbasin case study, we have...

Large scale development of tight oil resources in the USA started after 2010 with a following fi ve-year period favourable steady increase crude price.During this relatively short expansion cycle, operating and capital expenses changed drastically for main plays due to technological improvements both well drilling completion, service sector as loose government monetary policy which allowed nancing.This paper analysed trends costs during period, correlation price number rigs production...

On practical example of building being heated and cooled with shallow geothermal resource; via heat pump system; influence undisturbed ground temperature gradient on size borehole exchanger is going to be presented. Sizing was calculated commercial software Ground Loop Designer (GLD); which uses modified line source cylinder solutions conduction in solids.

The theory of Thermal Response Testing (TRT) is a well-known part the sizing process geothermal exchange system. Multiple parameters influence accuracy effective ground thermal conductivity measurement; like testing time, variable power, climate interferences, groundwater effect, etc. To improve TRT, we introduced procedure to additionally analyze falloff temperature decline after power test. method based on premise analogy between TRT and petroleum well testing, since origin both procedures...

Classic and extended step thermal response test were conducted on three diff erent locations in Zagreb.Measurements with the classical used to determine thermogeological properties of ground resistance borehole for each location.Diff values conductivity are result erences geological profi le depth sites.In addition, experimental research steady-state (SSTRST) was carried out heat rejection rates passive active cooling a steady state regime.Results showed that rate is only between 8-11 W/m,...

The utilization of shallow geothermal energy is well known in several European countries.Even though large parts the Republic Croatia show signifi cant potential for its use, installation ground source heat pump systems (heat and exchangers) slowly progressing.Therefore, a short overview research published thus far concerning assessments was done.In Croatia, there no agency or government department charge collecting publishing data installations exchangers.Therefore, study done to collect...

One of the important sources renewable energy is geothermal heat. Its special feature being independent 24/7 ensures stability and security system, either for electricity or heat production. Geothermal has a local character limited by geological characteristics each state. In Republic Croatia, development closely related to oil industry, as deposits were discovered during gas exploration. Considering established temperature gradients in there greater possibility using energy, this, it...

The present work focuses on the determination of absolute permeability in a hydrocarbon reservoir whose pressure is under bubble point.The simulation homogenic and well with simultaneous ow oil gas performed using Eclipse100 software.The main purpose to obtain build-up tests for two simulated systems, since testing technology requires shut-in period, which increases costs real production cycle.In rst it presumed that not damaged, having skin e ect equal zero, while second one, same 9.44.The...

Based on the statistical analysis of time series data, infl uence change Sava River temperature changes groundwater Zagreb and Samobor-Zaprešić aquifers is described.In analysis, data was used from daily measurements quarterly temperature.Statistical methods correlation linear regression were applied maximum, mean minimum temperatures analysed.The obtained results are presented in form parameters, diagrams maps isotherms.This da ta indispensable for development shallow geothermal...