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Dissertations / Theses on the topic 'Borehole pumps'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Razzetti, Elisa. "Potential for Seasonal Electricity Storage in Borehole Thermal Energy Stores with Heat Pumps." Thesis, KTH, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-244451.

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In Sweden, there is a substantial increase in renewable power generation that affects the elec-tricity market. At the residential, PV diffusion spreads in the last years due to price drop, while use of heat pump is consolidated. This thesis aims to evaluate the technological potential and economic value of seasonal storage of electricity in a thermal medium using boreholes and heat pump for a multi-family house in Sweden in a context of high renewable market. An existing GSHP-PV system model is implemented in TRNSYS with the addition of an in-line heater on the boreholes circuit. Its function

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2

Acuña, José. "Improvements of U-pipe Borehole Heat Exchangers." Licentiate thesis, KTH, Applied Thermodynamics and Refrigeration, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12749.

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<p>The sales of Ground Source Heat Pumps in Sweden and many other countries are having a rapid growth in the last decade. Today, there are approximately 360 000 systems installed in Sweden, with a growing rate of about 30 000 installations per year. The most common way to exchange heat with the bedrock in ground source heat pump applications is circulating a secondary fluid through a Borehole Heat Exchanger (BHE), a closed loop in a vertical borehole. The fluid transports the heat from the ground to a certain heating and/or cooling application. A fluid with one degree higher or lower temperatu

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3

Pouloupatis, Panayiotis. "Determination of the thermal characteristic of the ground in Cyprus and their effect on ground heat exchangers." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10982.

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Since the ancient years, human beings were using holes and caves to protect themselves from weather conditions making it the first known form of exploiting ground’s heat, known as Geothermal Energy. Nowadays, geothermal energy is mainly used for electricity production, space heating and cooling, Ground Coupled Heat Pump (GCHP) applications, and many other purposes depending on the morphology of the ground and its temperature. This study presents results of investigations into the evaluation of the thermal properties of the ground in Cyprus. The main objectives were i) to determine the thermal

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4

Каплун, Ігор Петрович, Игорь Петрович Каплун, Ihor Petrovych Kaplun, Михайло Богданович Оприско, Михаил Богданович Опрыско та Mykhailo Bohdanovych Oprysko. "Оцінка засобів регулювання параметрів малогабаритного осьового ступеня". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/31454.

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Аналіз змін за останні роки у параметрах свердловинних насосних агрегатів світових фірм-лідерів вказує на стійку тенденцію до збільшення подач насосів при одночасному зменшенню їх умовного діаметрального габариту. Дана тенденція вочевидь пов'язана з різким підвищенням вартості будівництва та облаштування свердловини з ростом її діаметру. Крім того, використання насосів з відносно високою подачею дозволяє зменшити на 10-12% по відношенню до об'єму видобутої води експлуатаційні затрати, витрати на трубну мережу та амортизацію. При цитуванні документа, використовуйте посилання http://essuir.sumdu

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5

Каплун, Ігор Петрович, Игорь Петрович Каплун, Ihor Petrovych Kaplun, Михайло Богданович Оприско, Михаил Богданович Опрыско та Mykhailo Bohdanovych Oprysko. "Підвищення ефективності осьових ступенів свердловинних насосів для водопостачання". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40440.

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За даними ООН, проблема доступу до водних ресурсів стала настільки болючою, що вимагає радикального переосмислення підходів до її вирішення. За оцінками експертів, до 2050 року потреба в продовольстві зросте на 70%. Глобальне споживання води для потреб сільського господарства зросте щонайменше на 19% і торкнеться майже 90% світових ресурсів прісної води.

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6

Неня, Віктор Григорович, Виктор Григорьевич Неня, Viktor Hryhorovych Nenia та Д. О. Шепеленко. "Стан дослідження прямих граток пластин". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40431.

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Розроблення методики проектування ступенів осьових насосів для свердловинних насосів передбачає використання у методиці проектування функціональної залежності теоретичного напору від конструктивних та режимних параметрів ступеню. Причому для отримання рекомендацій щодо прийняття проектних рішень доцільно мати таку залежність у явному виді.

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7

Wajman, Michal. "Technical and Economical Analysis of Ground Source Heat Pump Systems with BHE in Poland." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33642.

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Nowadays, Ground Source Heat Pumps (GSHPs) are more frequently acting as a main or the only device covering the building heat/cool demand. The most efficient way to extract/dissipate the low-temperature heat from/to the ground is by means of Borehole Heat Exchanger (BHE). In this Master of Science Thesis various aspects related to this technology are studied, focused on summarizing the possibilities of installing this tech-nology in Poland. Borehole drilling methods used in Poland and Sweden are analyzed and the most proper and economical ones according to Polish geological structure are propo

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8

Liuzzo, Scorpo Alberto. "Heat transfer in borehole heat exchangers and the contribution of groundwater flow." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/10123.

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2012/2013<br>The exploitation of geothermal heat by ground source heat pumps is presently growing throughout Europe and the world. In Italy, at the end of 2010, borehole heat exchangers covered most of the 30% of the total energy used for space conditioning, showing an increase of 50%compared to 2005. The forecasts for 2015 suggest a further increase in the direct uses of the geothermal heat exceeding 50% compared to 2010 and a corresponding increase in the geothermal energy consumption. The possibility to design plants with higher efﬁciency and lower costs of installation and operation is re

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9

Каріх, А. С., Ольга Анатолiївна Матвiєнко, Ольга Анатольевна Матвиенко та Olha Anatoliivna Matviienko. "Дослідження способів зниження осьового зусилля в малогабаритному осьовому ступені". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40557.

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Із розвитком сучасної промисловості особливо актуальною стала проблема забезпечення населення якісною питною водою. Основною причиною неякісної питної води є забруднення поверхневих вод. Традиційно для таких задач використовують заглибні свердловинні насоси типу ЕЦВ, проте середнє значення ККД, яке вони можуть забезпечити не завжди достатнє.

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10

Tinti, Francesco. "Modelli di scambio termico in pozzo sulla base della caratterizzazione geotermica di un reservoir a bassa entalpia: studio di sensitività sulla efficienza dei sistemi di condizionamento a pompa di calore." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amslaurea.unibo.it/24/.

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Tra i temi di attualità, quello del risparmio energetico è tra i più dibattuti negli ultimi anni; tale tema è strettamente correlato al problema del riscaldamento globale, infatti, mentre sul prossimo esaurimento delle risorse energetiche tradizionali non vi sono ancora certezze assolute, per quanto riguarda l’azione nociva dei gas serra, la Comunità Scientifica Internazionale si ritrova d’accordo su una netta presa di posizione contro l’emissione di tali sostanze, provocata in larga parte dall’utilizzo dei combustibili fossili. In questo contesto, l’Unione Europea sta promuovendo la diffusion

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11

Каплун, Ігор Петрович, Игорь Петрович Каплун, Ihor Petrovych Kaplun та Я. С. Підкуйко. "Аналіз параметрів типорозмірних рядів ступенів свердловинних насосів". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/31446.

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В умовах збільшення екологічних ризиків, водопостачання зі свердловин стає в Україні все більш актуальним. Основним обладнанням для підйому води є свердловинні насоси, які мають відповідати певним вимогам до діапазонів робочих параметрів, так як споживач крім випадків створення системи водопостачання з нуля часто має потребу в реновації та модернізації існуючої, якій насос повинен відповідати по ряду критеріїв. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/31446

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12

Penttilä, Jens. "Temperaturzoner för lagring av värmeenergi i cirkulärt borrhålsfält." Thesis, KTH, Energiteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128951.

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The thermal response of a borehole field is often described by non‐dimensional response factors called gfunctions.The g‐function was firstly generated as a numerical solution based on SBM (Superposition BoreholeModel). An analytical approach, the FLS (Finite Line Source), is also accepted for generating the g‐function. In thiswork the potential to numerically produce g‐functions is studied for circular borehole fields using the commercialsoftware COMSOL. The numerical method is flexible and allows the generation of g‐functions for any boreholefield geometry. The approach is partially validated

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13

Erol, Selcuk. "Near Field Investigation of Borehole Heat Exchangers." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/221739.

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As an alternative and renewable energy source, the shallow geothermal energy evolving as one of the most popular energy source due to its easy accessibility and availability worldwide, and the ground source heat pump (GSHP) systems are the most frequent applications for extracting the energy from the shallow subsurface. As the heat extraction capacity of the GSHP system applications arises, the design of the borehole heat exchangers (BHE), which is the connected part of the system in the ground, become more important. The backfilling materials of BHEs, particularly, the grout material must pro

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14

Delattre, Baptiste. "Monitoring of a heat pump system using deep borehole heat exchangers." Thesis, KTH, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-245880.

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Sweden has been one of the first countries in the world to use ground-source heat pumps (GSHP) to supply heating and cooling to its buildings. Today, it is the leading country in Europe and new installations tend to have larger capacities. The use of deeper borehole heat exchangers (BHE) is an opportunity to extract larger amounts of heat over small land areas. However, there are only few case studies on BHE deeper than 300 m, hence such systems may be optimized. This study focuses on a deep GSHP system recently installed in central Stockholm, composed of four 510 m deep BHE. The objectives we

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15

Abu-Adma, Maged Ahmed. "Isolated induction generator, induction motor scheme for borehole pump and other application." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47325.

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16

Derouet, Marc. "Analysis of borehole heat exchanger in an existing ground-source heat pump installation." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148158.

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Ground-source heat pumps systems (GSHP) are commonly used all over Sweden to supply heat and sometimes cool to different kinds of housings or commercial facilities. Many large installations are by now between 10 and 20 years old. Even when the design of such system has been tackled, rare are the studies that have dealt with following their performance throughout time in detail. Based on conductive heat transfer, the heat extraction process makes the ground temperature decrease when installations are only used for heating. This thesis aims at proposing a method to evaluate how the temperature i

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17

Monzó, Patricia. "Comparison of different Line Source Model approaches for analysis of Thermal Response Test in a U-pipe Borehole heat Exchanger." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-72834.

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Ground Source Heat Pumps (GHSPs) is a relevant application and around 3 million installations are setting up at the beginning of 2010 (IEA ECES Annex 21). The improvements in GSHPs are currently focused on the optimization of the system and the reduction of costs installations. The thermal conductivity of the ground and thermal resistance of the Borehole Heat Exchanger (BHE) are important design parameters for Borehole Thermal Energy Storage (BTES) systems. The Thermal Response Test (TRT), which has been used up to now in the GHE design, only allows estimating mean values for thermal conductiv

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Ramanathan, Sriram. "Sensitivity Analysis and Optimization of the Vertical GSHP (Ground source heat pump)." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171867.

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GSHP (Ground source heat pump), uses geothermal energy which is a form of green and sustainable energy. Geothermal energy is also a continuous source of energy, unlike wind energy. The results from this thesis work will be applicable for both GSHP that are being used for space heating, and the ones which have a bottom organic Rankine cycle. The bottom organic Rankine cycle and continuous energy production of GSHP make it a potential source for electricity generation. The GSHP is of various types, in regard to the configuration of the pipe and their setup in the ground and also based on their

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Righi, Alexandro. "Numerical models and simulations of geothermal heat exchangers." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185816.

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Kamarad, Anthony. "Design and construction of a mobile equipment for thermal response test in borehole heat exchangers." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99558.

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In 2010, the Ground Source Heat Pumps (GSHPs) market in the European Union went up over one million (1 014 436 units at the end of 2010 according to EUROBSERV’ER 2011). In 2011, it was estimated around 1.25 million according to Bayer et al. (2012). With more than 378 000 units installed in 2010, according to the Swedish heat pump association (SVEP), the Swedish GSHPs market was the first in the EU. As for the French GSHPs market, it was estimated to 151 938 units in service in 2010, which propelled France at the third rank in the EU. However, despite a relatively important number of GSHPs inst

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Cazorla, Marín Antonio. "MODELLING AND EXPERIMENTAL VALIDATION OF AN INNOVATIVE COAXIAL HELICAL BOREHOLE HEAT EXCHANGER FOR A DUAL SOURCE HEAT PUMP SYSTEM." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/125696.

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[ES] La energía geotérmica de baja entalpía es una alternativa eficiente y renovable a los sistemas convencionales para proporcionar calefacción, refrigeración y producir agua caliente sanitaria (ACS) de forma sostenible. El proyecto GEOTeCH plantea el desarrollo de sistemas con bomba de calor geotérmica más eficientes y con un coste menor en comparación con el mercado. Para ello, se ha desarrollado un nuevo tipo de intercambiador enterrado coaxial con flujo helicoidal en el tubo externo que presenta una mayor eficiencia y permite reducir la longitud de intercambiador a instalar, así como una

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Aljabr, Ahmad. "Numerical Modeling of the Effects of Micro-Encapsulated Phase Change Materials Intermixed with Grout in Vertical Borehole Heat Exchangers." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1625487538913629.

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23

CASASSO, ALESSANDRO. "Low enthalpy geothermal systems: coupled flow and heat transport modelling of the long-term performances of Borehole Heat Exchangers." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2496975.

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The Ground Source Heat Pump (GSHP) is a promising technology for the heating and cooling of buildings with renewable energy sources. Borehole Heat Exchangers, in which heat is exchanged by circulating a heat carrier fluid into a pipe closed loop, are the most used typology. The energy performances of these plants depend from the properties of the BHE and of the soil. In this work, the operation of BHE for a period of 30 years has been simulated, using a finite-element subsurface flow and heat transport modelling code (FEFLOW). The relative influence of each BHE, hydrogeological and thermal soi

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Badenes, Badenes Borja. "Optimización teórico-experimental de sondas de calor para intercambio geotérmico (SGE) según condiciones hidrogeológicas, características geométricas y propiedades de sus materiales." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/160477.

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[ES] Uno de los mayores retos para el mercado de bombas de calor geotérmicas es el alto coste asociado a la perforación de los intercambiadores de calor geotérmicos. Conseguir unos intercambiadores de calor geotérmicos más eficientes reduciría dicho coste, ya que sería necesaria una menor longitud de intercambiador para obtener las mismas temperaturas de trabajo en él (misma eficiencia de la bomba de calor). La eficiencia térmica de un intercambiador de calor geotérmico está caracterizada por su resistencia térmica. Dicha resistencia térmica depende de una serie de elementos entre los que s

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Clauss, John. "Feasibility study for upgrading the current heat distribution network of an existing building complex to a Smart Thermal Grid." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173741.

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A feasibility study on upgrading an existing heat distribution network to a low-temperature distribution grid has been carried out during this project. The integration of a solar thermal system combined with a borehole thermal energy storage (BTES) for covering the space heating demand of the buildings as well as the application of CO2 heat pumps and water storage tanks for domestic hot water (DHW) production were investigated in order to apply more renewable energy sources. The energy analysis included several measures, such as modeling the energy demand of the buildings, finding a reasonable

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Westin, Rasmus. "Värmeöverföring i bergvärmesystem : En numerisk analys av den ringformade koaxiala borrhålsvärmeväxlaren." Thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176915.

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The borehole heat exchangers of today suffer from poor thermal and hydrodynamic performance. The purpose of this thesis is to improve the performance of ground source heat pump systems and thermal energy storages by increasing the energy efficiency of the borehole heat exchangers. For this reason, the annular coaxial borehole heat exchanger (CBHE) has been analyzed. This type of heat exchanger is interesting in terms of both thermal and hydrodynamic performance. A model has been set up in the program Comsol Multiphysics in order to investigate the heat transfer characteristics along the boreho

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Hein, Philipp Sebastian. "On the efficient and sustainable utilisation of shallow geothermal energy by using borehole heat exchangers." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232226.

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In the context of energy transition, geothermics play an important role for the heating and cooling supply of both residential and commercial buildings. Thereby, the increasingly and intensive utilisation of shallow geothermal resources bears the risk of over-exploitation and thus poses a future challenge to ensure the sustainability and safety of such systems. Particularly, the well-established technology of borehole heat exchanger-coupled ground source heat pumps is applied for the thermal exploitation of the shallow subsurface. Due to the complexity of the involved physical processes, numer

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Simondon, Camille. "Optimization of thermal response test equipment and evaluation tools." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147764.

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Nowadays Ground Source Heat Pumps (GSHP) are widely used to provide heating and/or cooling as well as domestic hot water in commercial and residential buildings. The Swedish GSHPs market is the first one in the European Union with more than 378,000 units installed until 2010 according to the Swedish Heat Pump Association (SVEP). This thesis focuses on the improvement of a Thermal Response Test (TRT) apparatus available at KTH Royal Institute of Technology – Energy Technology Department. This equipment aims at improving Borehole Heat Exchanger (BHE) design in terms of size. Its key purpose is t

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Denker, Richard. "Dimensioning and control for heat pump systems using a combination of vertical and horizontal ground-coupled heat exchangers." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36475.

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A model has been developed which simulates a system consisting of a horizontal and vertical ground-coupled heat exchanger connected in parallel to the same heat pump. The model was used in computer simulations to investigate how the annual minimum and mean fluid temperatures at the heat pump varied as several parameters of the combined system were changed. A comparison was also made between different control settings for fluid flow rate distribution between the two exchangers. For the case when the flow rate distribution was not controlled, the effect of viscosity differences between a colder

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Ilisei, Gheorghe. "Numerical analysis using simulations for a geothermal heat pump system. : Case study: modelling an energy efficient house." Thesis, Högskolan i Gävle, Energisystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29101.

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The ground source resources are becoming more and more popular and now the ground source heat pumps are frequently used for heating and cooling different types of buildings. This thesis aims at giving a contribution in the development of the thermal modelling of borehole heat storage systems. Furthermore, its objective is to investigate the possibility of implementing of a GSHP (ground source heat pump) with vertical boreholes, in order to deliver the heating and cooling demand for a passive house and to emphasize some certain advantages of this equipment even in the case of a small building (

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Naicker, Selvaraj Soosaiappa. "Performance analysis of a large-scale ground source heat pump system." Thesis, De Montfort University, 2015. http://hdl.handle.net/2086/12265.

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The UK government’s Carbon Plan-2011 aims for 80% carbon emission reduction by 2050, and the 2009 UK National Renewable Energy Action Plan has set a target of delivering 15% of total energy demand by renewable energy sources by 2020. Ground Source Heat Pump (GSHP) systems can play a critical role in reaching these goals within the building sector. Achieving such benefits relies on proper design, integration, installation, commissioning, and operation of these systems. This work seeks to provide evidence to improve the practices in design, installation and operations of large GSHP systems. This

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Tamošaitis, Donatas. "Geoterminio šildymo ekonominis ir techninis įvertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110224_091359-85043.

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Žemės šilumos siurblių sistemos surenka žemės šilumą, dažniausiai vertikaliu U formos gręžinio šilumokaičiu. U formos gręžinio šilumokaičio našumas priklauso nuo šiluminių žemės savybių, taip pat nuo gręžinyje naudojamo skiedinio ar užpildo. Siekiant, kad Žemės šilumos siurblių sistemos pasiteisintų, projektuojant reikia atsižvelgti į geologinių struktūrų šiluminį laidumą ir gręžinio šilumokaičio šiluminę varžą. Šio darbo tikslas buvo nustatyti šilumos siurblio, naudojančio grunto šilumą, pritaikymo individualioje sodyboje siurblio techninis ir ekonominis įvertinimas. Nustatyta, kad investicij

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BÖRJESSON, MARCUS. "Performance evaluation of ground source heat pump heating systems in Stockholm." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286000.

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GSHP systems are common in Sweden but there are few evaluations quantifying the performance of the systems and highlighting problem that occurs during operations. The research project Annex 52 Long-term performance measurement of GSHP systems serving commercial, institutional and multifamily building part of IEA HPT TCP proves the need to systematically be able to evaluate GSHP systems. This thesis aims to expand the knowledge of how to evaluate GSHP systems and provide case studies for Annex 52. Three residential ground source heating systems used for heating has been evaluated and analyzed i

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Raschke, Marcus, and Victor Peterson. "Termisk energilagring i borrhål : En studie av borrhålets temperaturinverkan på värmepumpens värmefaktor." Thesis, KTH, Byggteknik och design, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147305.

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Sverige har en hög andel installerade bergvärmepumpar, som är en typ av vätska-vatten värmepump. Ett problem som finns för befintliga bergvärmesystem är att berget med tiden kyls ned då returslangen till borrhålet konstant levererar kyla till berget. Till följd av detta mister systemet en betydande del av sin verkningsgrad samtidigt som det i extrema fall kan leda till permanent isbildning i borrhålet. Ett sätt att motverka detta problem är att tillämpa termisk energilagring i bergvärmesystemets borrhål. Den internationella benämningen för denna teknik är ”Borehole Thermal Energy Storage, BTES

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Kovářík, Tomáš. "Tepelná čerpadla země - voda." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226841.

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Master’s thesis deals with the theme in three parts theoretical, practical and experimental. Project deals with heating nursery school and experiment deals with capacity reduction borehole heating exchanger for ground – source heat pump.

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Fuentes, Cristopher, and Christopher Peralta. "Miljövänlig kyla : En studie för framtagning av verktyg för att underlätta val av olika kylsystem." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36112.

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The study compared four different cooling systems and analyzed the competitiveness in those systems regarding electricity consumption, environmental impact and life cycle cost analysis. The assignment was given from the consultant company Ramböll who believed in these systems design as a solution to minimize the energy consumption in cooling systems. The purpose of the study was to facilitate the selection of cooling system by finding a key ratio for profitability in terms of energy consumption. This makes it easier to select one of these systems in project planning. A representative building

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Perez, Gonzalez Jesus Angel. "Understanding numerically generated g-functions: A study case for a 6x6 borehole field." Thesis, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-126017.

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The Ground Source Heat Pump systems (GSHP) are an emerging technology used to exchange heat with the ground through the use of some buried heat exchangers. The thermal response of a borehole field can be characterized by its g-function. It is a non-dimensional temperature response factor, which can be calculated using either numerical or analytical solutions. Eskilson developed the first study made for the calculation of these g-functionts. Lamarche and Beauchamp proposed another analytical approach based on the Finite Line Source (FLS). Generally, both solutions present similar results with s

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Оприско, Михайло Богданович, Михаил Богданович Опрыско, Mykhailo Bohdanovych Oprysko, Ігор Петрович Каплун, Игорь Петрович Каплун та Ihor Petrovych Kaplun. "Закрутка потоку на вході в робоче колесо як засіб регулювання параметрів малогабаритного осьового ступеня". Thesis, 2013. http://essuir.sumdu.edu.ua/handle/123456789/42810.

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Використання підземних вод з артезіанських свердловин стає все більш перспективним в Україні завдяки їх максимальній наближеності до споживача, зручності облаштування та експлуатації водозаборів, порівняної чистоти води і економічності у порівнянні з відкритими поверхневими водозаборами. За деякими оцінками в загальному об'ємі водопостачання в Україні вода із свердловин займає зараз близько 32%, і в майбутньому, ця частка, очевидно, буде тільки збільшуватися. Варто зазначити, що за оцінками експертів до 84% вартості життєвого циклу насосного обладнання, яке є найбільш енергозатратним у таких с

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Thorén, Åsa. "Practical evaluation of borehole heat exchanger models in TRNSYS." Thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183784.

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Vertical ground source heat pumps are established and still growing on the global market. The modelling of these systems is important for system design and optimization. This is an active field of research, and many models are often built into system simulation software such as TRNSYS. With the intention of having a better sensibility for existing TRNSYS tools, three different cases are simulated with several TRNSYS tools, so called Types. A Thermal Response Test, a large borehole field of an IKEA building complex in Sweden, as well as the Marine Corps Logistic Base in Albany, USA. The vertica

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Casellato, Francesco. "Heat exchange phenomena and COP evaluation in heat pump systems coupled to single borehole heat exchangers." Thesis, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-137234.

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In recent years a growing interest in Borehole Heat Exchangers (BHEs) has been shown in Europe thanks to the increase of installations in systems connected to Ground Source Heat Pumps (GSHPs) used for heating and cooling needs. Different geometries and technical solutions have been de- veloped in order to improve heat exchange with the ground, accompanied by several descriptive models. Recently, innovative technologies as optical fiber for a new Distributed Thermal Response Test (DTRT) have been proposed. This method allows the quantification of the BHE local perfor- mances, so that a more acc

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Lai, Kam-Pang, and 黎錦鵬. "Analysis of Multi-U type Borehole Heat Exchangers for Ground Source Heat Pump System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/xh3ya5.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>107<br>Ground Source Heat Pump(GSHP) System used Shallow Geothermal Energy to cool down or heat up of buildings, so the heat exchanging between Heat Pump and Shallow Geothermal Energy is important to GSHP’s performance. Here, a multi-U type borehole heat exchanger which uses groundwater as backfilled material and has similar operation mode to the shell-and-tube heat exchanger was designed. This heat exchanger has forced convection of groundwater through shell side to enhances heat exchanging. This study analyze the performance of GSHP combined with multi-U type bore

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Olfman, Maeir Zalman. "Characterization of the Ground Thermal Response to Heating by a Deep Vertical Borehole Heat Exchanger." 2012. http://hdl.handle.net/1993/5086.

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This thesis presents an experiment and an analysis that evaluates some of the long-standing assumptions in deep vertical borehole ground heat exchanger (GHX) theory. These assumptions neglect ground heterogeneity and depth variations in GHX output and the ground temperature response (GTR). This thesis describes an apparatus and an experiment that measured the GTR at several depths, times, and at two different horizontal distances from a GHX both during and immediately after its operation. This thesis also reports the temperature response data, which may not be available from other sources in s

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Hein, Philipp Sebastian. "On the efficient and sustainable utilisation of shallow geothermal energy by using borehole heat exchangers." Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A30732.

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In the context of energy transition, geothermics play an important role for the heating and cooling supply of both residential and commercial buildings. Thereby, the increasingly and intensive utilisation of shallow geothermal resources bears the risk of over-exploitation and thus poses a future challenge to ensure the sustainability and safety of such systems. Particularly, the well-established technology of borehole heat exchanger-coupled ground source heat pumps is applied for the thermal exploitation of the shallow subsurface. Due to the complexity of the involved physical processes, numer

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Dias, Julio Cesar Goncalves. "Sistema de climatização de edifícios com uma bomba de calor geotérmica de alto rendimento." Master's thesis, 2013. http://hdl.handle.net/10316/40420.

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