| 1. |
- Nordell, Bo, et al.
(författare)
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Fracturing of a pilot plant for borehole heat storage in rock
- 1986
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Ingår i: Tunnelling and Underground Space Technology. - : Elsevier BV. - 0886-7798 .- 1878-4364. ; 1:2, s. 195-208
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes research on a pilot plant in Luleå, Sweden. The plant consists of 19 boreholes, 52 mm in diameter, for heat supply and extraction; and 10 boreholes for temperature monitoring. All the boreholes are 21 m deep. The report describes in detail the performance and results of rock mass permeability and borehole permeability tests. It also discusses hydraulic fracturing and explosive fracturing in the boreholes. A simulation model of water flow in the test plant is described. The paper includes conclusions from the test results and recommendations for further study.
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| 2. |
- Al-Madhlom, Qais, et al.
(författare)
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Potential use of UTES in Babylon Governorate, Iraq
- 2020
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Ingår i: Groundwater for Sustainable Development. - : Elsevier. - 2352-801X. ; 10
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Tidskriftsartikel (refereegranskat)abstract
- There is a global attention that the future energy systems will be based on renewable energy like solar and wind. The large-scale utilization of renewables in space heating and cooling requires large Thermal Energy Storage TES to overcome the varying supply and demand. The process of producing the best Underground Thermal Energy Storage UTES system pass through two steps: first, finding the best type of UTES system, second, finding the best locations to install UTES system. Both of these two steps depend extremely on the site specific parameters such that the depth to the groundwater, transmissivity, type of soil, the depth to the bedrock, and seepage velocity. The purpose of this paper is to explain some of the site specific parameters that the type of UTES-system depends on and explain the suitable type of UTES systems. This study considers Babylon province (Iraq) as study area. This province has electricity deficiency due to Heating Ventilating and Air Conditioning HVAC applications. The methodology of this study includes reviewing the literature that consider the study area, and using Arc Map/GIS to visualize some of the in-site parameters. The results indicate that the best type of UTES system for the considered region is either aquifer or pit type, due to the type of the soil and the depth to the crystalline bedrock. The hydraulic conductivity and the seepage velocity in the considered region are (0.0023–2.5) m/d and (1.3 × 10−6 – 3.45 × 10−3) m/d respectively. These conditions satisfy the standards which regard aquifer type.
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| 3. |
- Al-Madhlom, Qais, et al.
(författare)
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Site Selection Criteria of UTES Systems in Hot Climate
- 2019
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Ingår i: Proceedings of the XVII ECSMGE-2019. - Iceland : The Icelandic Geotechnical Society (IGS). ; , s. 1-8
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Konferensbidrag (refereegranskat)abstract
- Underground Thermal Energy Storage UTES systems are widely used around the world. The reason is that UTES is essential in utilizing Renewable Energy sources (RE). The efficiency of the energy system relies strongly on the efficiency of the storage system. Therefore, in the installation of a hyper-energy system, a lot of attention is to be paid in improving the storage system. In order to design an efficient storage system, firstly, standard criteria are to be investigated. These explain the process of making high efficiency storage system that must be specified. The criteria, mainly, depends on: best type and best location. These two variables are in high interference with each other. The bond between the two variables is represented by the geological, hydrological, meteorological, soil, hydrogeological properties/factors of the site. These factors are specified by geo-energy mapping. Despite the importance of this type of mapping, there is no specific criteria/formula that defines the choice. This paper aims to: give a brief literature review for UTES systems (types, classification, advantages/disadvantages for each type, and examples of an installed system). In addition, some factors within geo-energy mapping are highlighted and standard criteria to achieve good storage system are suggested. The suggested criterion comprises a process to transfer the quantity values to quality values according to the expert opinion. The suggested criteria are defined through the following stages: selecting the best type of UTES systems according to hydro-geological in site conditions; using the analytical hierarchy process to rank the best location to install the storage system and then using ArcMap (GIS-Software) to provide representative results as maps. Karbala Province (Iraq) is the study area used here
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| 4. |
- Al-Madhlom, Qais, et al.
(författare)
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Site Selection of Aquifer Thermal Energy Storage Systems in Shallow Groundwater Conditions
- 2019
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Ingår i: Water. - Switzerland : MDPI. - 2073-4441. ; 11:7
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Tidskriftsartikel (refereegranskat)abstract
- Underground thermal energy storage (UTES) systems are widely used around the world, due to their relations to heating ventilating and air conditioning (HVAC) applications [1]. To achieve the required objectives of these systems, the best design of these systems should be accessed first. The process of determining the best design for any UTES system has two stages, the type selection stage and the site selection stage. In the type selection stage, the best sort of UTES system is determined. There are six kinds of UTES systems, they are: boreholes, aquifer, bit, tank, tubes in clay, and cavern [2–5]. The selection of a particular type depends on three groups of parameters. They are: Site specific, design, and operation parameters (Figure 1). Apart from site specific parameters, the other two types can be changed through the life time of the system. The site specific parameters, e.g., geological, hydrogeological, and metrological, cannot be changed during the service period of the ystem. Therefore, the design of the best type should depend, at first consideration, on site specific parameters.
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| 5. |
- Elhammeli, Alaaeddin A., et al.
(författare)
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Producing water by condensation of humid air in buried pipe
- 2017
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Ingår i: Proceedings of the International Conference on Industrial Engineering and Operations Management. - : IEOM Society. - 9780985549763 ; , s. 2270-2281
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Konferensbidrag (refereegranskat)abstract
- This study investigates the possibility of using warm humid air for irrigation and drinking water production, by flowing air over the water surface in a solar still with saline or polluted water. Vapor will be saturated during mixing with the warm air in buried pipe. Finite difference method is employed to simulate the flow of the air long the pipe. The amount of water produced and buried pipe length depends upon the flow velocity, humid air properties and buried pipe diameter. The amount of water produced is 0.02525kg/s (0.0909m3/h). The length of the buried pipe needed in this study is 77.36m for a selected air flow velocity 5m/s with the properties of 70°C, 100% relative humidity at pipe inlet, 40°C and 100% relative humidity at pipe outlet of 0.2m pipe diameter. The results agree with a previous study (Gustafsson & Lindblom, 2001) with -4.0% deviation in water production and 7% of required pipe length
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| 6. |
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| 7. |
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| 8. |
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| 9. |
- Altorkmany, Lobna, et al.
(författare)
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Overview of Legionella Bacteria Infection : Control and Treatment Methods
- 2009
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Konferensbidrag (refereegranskat)abstract
- Since the first recognized outbreak of Legionnaires' disease (LD) in 1976, it has become an increasing problem around the world especially in poor countries. Legionella (L) causes an estimated 15,000 annual cases of pneumonia in USA, and leads to death in about 20% of the cases. L is found worldwide in both natural and artificial environments e.g. spa pools, cooling towers. It infects people by inhaled contaminated aerosols that can transmit several km. The optimal temperature for L growth is 20-45C. Control of L is therefore an important health issue. Many treatment methods are used; biocides, ionisation, ozone, UV-radiation, pressure, and thermal treatment. Only thermal treatment can completely eliminate L, which is killed almost instantly at 70C. Current paper gives an overview of the Legionella problem and treatment methods.
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| 10. |
- Amara, S., et al.
(författare)
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Biomass Dry Storage for Capture and Storage of CO2 and Energy
- 2018
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Ingår i: Proceedings of the 2nd International Conference on Vocational Education and Training (ICOVET 2018). - Paris, France : Atlantis Press. ; , s. 188-192
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Konferensbidrag (refereegranskat)abstract
- Carbon dioxide (CO2) and other greenhouse gases (GHG) are considered the main cause of many environmental issues that lead to climate change and global warming. Carbon Capture and Storage (CCS) is a promising sustainable method used for decreasing CO2 emissions. Nevertheless, for the CCS technology to be effectively put into use, some aspects should be taken into account, namely cost, capacity and durability of storage. In this paper, different CCS methods are described and the work proposes an alternative way of storing CO2 (and energy) using large-scale dry storage of biomass. The main advantage of suggested carbon storage system is that has no operation cost, and no need for maintenance and monitoring. By comparing the present project with other advanced and hi-tech projects, it is concluded that the proposed biomass storage is a cost-effective CCS technique. In the future, when the CO2 emissions are not seen as a global problem, this dry storage method enables recovery of stored wood for various purposes.
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