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The impact of diatomite on the thermal conductivity of solidified grout 硅藻土对固化浆液导热性的影响

AGH Drilling,Oil,Gas Pub Date : 1900-01-01 DOI: 10.7494/DRILL.2017.34.3.691

S. Dubiel, T. Śliwa, T. Kowalski, S. Stryczek, D. Wiśniowski, Anna Bieda, S. Piwowarczyk, J. Beszłej, M. Naklicki

{"title":"The impact of diatomite on the thermal conductivity of solidified grout","authors":"S. Dubiel, T. Śliwa, T. Kowalski, S. Stryczek, D. Wiśniowski, Anna Bieda, S. Piwowarczyk, J. Beszłej, M. Naklicki","doi":"10.7494/DRILL.2017.34.3.691","DOIUrl":"https://doi.org/10.7494/DRILL.2017.34.3.691","url":null,"abstract":"The development of geothermal energy in Poland is related to the high demand for renewable energy. This requires solving problems such as, for example, modifying ways of acquiring the Earth’s heat and the selection of appropriate systems providing boreholes, as well as the thermal energy of thermal water layers and layers of rock (including salt domes), incorporating modern design solutions in borehole heat exchangers. Sealing grout is an important part of the installation as it can guarantee the proper functioning of the borehole heat exchanger. The main task of the grout is to tightly fill the space between the walls of the well and heat exchanger [3]. The grout used to install a borehole heat exchanger should be easily pumpable and have good workability. It should have increased thermal conductivity paired with a low permeability [7]. What is more the grout should be able to isolate aquifers to prevent them from pollution [13]. The grout used in boreholes or holes which are geothermal should have good pump-ability for a specified duration of the treatment, cementing at a wide range of pressures and temperatures. In addition, solidified grout should be corrosion resistant, have a low permeability and high adhesion to rock and casing. It should also be characterized by certain strength parameters [14]. In geothermal wells the goal is to minimize heat loss while water is flowing to the surface. This can be achieved by the use of grouts with reduced thermal conductivity. Such grouts are also recommended in the upper part of the deep borehole heat exchangers (Fig. 1) and the upper part of the energy piles. However, at the bottom of deep borehole heat exchangers and typical borehole heat exchangers (usually at a depth of 200 m) it is recommended to","PeriodicalId":201856,"journal":{"name":"AGH Drilling,Oil,Gas","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114686641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}