The invention relates to a method for optimizing a district heating network (1) comprising outgoing supply pipes and incoming return pipes, wherein a heat carrying fluid is circulated to be utilized for residential and commercial heating requirements. For storing excess thermal energy available at the district heating network, the method involves the steps of implementing more than one ground-based borehole thermal energy storage (4) as distributed heat storages at different locations of or along the district heating network (1). Each heat storage (4) is adapted to receive thermal energy from various forms of heat sources, which heat sources may be found at different locations of or along the district heating network (1) such, that the heat sources and the heat storages forming nodes in the district heating network (1). Excess thermal energy available to one node of the district heating network (1) is used to charge a borehole thermal energy storage (4) at one or several nodes, and thermal energy available from the borehole thermal energy storages (4) is at disposal to be used to heat the heat carrying fluid circulated in the supply pipes of the district heating network.
The present invention comprises an arrangement in a borehole. Such an arrangement comprises two tubes, an outer tube and an inner tube being arranged within each other having essentially parallel longitudinal axes. Said outer and inner tubes are connected to incoming and outgoing tubes respectively. The cross sectional area of the inner tube is less than half of the cross sectional area of the outer tube, whereby the outer tube and/or the incoming and outgoing tubes arranged in the borehole are insulated until they reach below a freezing depth of the surrounding media. Said the inner tube is also arranged to end before reaching the bottom end of the outer tube when inserted in the borehole, thus forming a fluid passage between the both tubes at the bottom end of said borehole.
F24T 10/17 - Collecteurs géothermiques avec circulation des fluides vecteurs dans des conduits souterrains, les fluides vecteurs n’entrant pas en contact direct avec le sol utilisant des assemblages de conduits adéquats pour l’insertion dans des trous forés dans le sol, p. ex. sondes géothermiques utilisant des conduits fermés à une extrémité, c.-à-d. du type à retour
F28D 7/12 - Appareils échangeurs de chaleur comportant des ensembles de canalisations tubulaires fixes pour les deux sources de potentiel calorifique, ces sources étant en contact chacune avec un côté de la paroi d'une canalisation les canalisations étant disposées l'une dans l'autre, p. ex. concentriquement le tube extérieur étant fermé à une extrémité, c.-à-d. du type à retour
The present invention comprises an arrangement in a borehole (13). Such an arrangement comprises two tubes, an outer tube (11) and an inner tube (12) being arranged within each other having essentially parallel longitudinal axes. Said outer and inner tubes are connected to incoming and out-going tubes (15, 16) respectively. The cross sectional area of the inner tube (12) is less than half of the cross sectional area of the outer tube (11), whereby the outer tube (11) and/or the incoming and outgoing tubes (15, 16) arranged in the borehole (13) are insulated until they reach below a freezing depth of the surrounding media. Said the inner tube (12) is also arranged to end before reaching the bottom end of the outer tube (11) when inserted in the borehole (13), thus forming a fluid passage (14) between the both tubes at the bottom end of said borehole.
F24T 10/17 - Collecteurs géothermiques avec circulation des fluides vecteurs dans des conduits souterrains, les fluides vecteurs n’entrant pas en contact direct avec le sol utilisant des assemblages de conduits adéquats pour l’insertion dans des trous forés dans le sol, p. ex. sondes géothermiques utilisant des conduits fermés à une extrémité, c.-à-d. du type à retour
4.
ARRANGEMENT AND METHOD FOR OPTIMAL ENERGY STORAGE AND RECAPTURING OF THERMAL WELLS
The present invention relates to an arrangement and method for optimal energy storage and recapturing of thermal wells. Such an arrangement consists of an underground centre storage (2, 12) and bore wells (3) surrounding it in a substantially concentric and circular manner, there being two or more of such circles (4). The centre storage and bore wells are arranged to be in flow communication with each other by means of a pipe line (6) and with one or more heat sources (9) leading thermal energy to the system, the circles being provided with valves (8) to lead fluid transfer fluid to one circle of part thereof at a time.
F24T 10/13 - Collecteurs géothermiques avec circulation des fluides vecteurs dans des conduits souterrains, les fluides vecteurs n’entrant pas en contact direct avec le sol utilisant des assemblages de conduits adéquats pour l’insertion dans des trous forés dans le sol, p. ex. sondes géothermiques
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
F24T 10/30 - Collecteurs géothermiques utilisant des réservoirs souterrains pour l’accumulation des fluides vecteurs ou des fluides intermédiaires
A solar collector arrangement (1) comprises at least two solar collectors (2), each solar collector (2) comprising at least one collector element (3) with at least one flow channel for receiving heat transfer medium to be heated in the solar collector (2). The at least two solar collectors (2) are arranged in parallel connection relative to each other and the heat transfer medium to be heated in the solar collectors (2) and the heat transfer medium heated in the solar collectors (2) are arranged to flow into the solar collectors (2) and out of the solar collectors (2) in turns one or some solar collectors (2) of the solar collector arrangement (1) at a time.
F24S 50/00 - Agencements pour commander les collecteurs de chaleur solaire
F24S 50/40 - Agencements pour commander les collecteurs de chaleur solaire sensibles à la température
F24S 10/00 - Collecteurs de chaleur solaire utilisant des fluides vecteurs
F24S 80/30 - Agencements pour connecter les circuits de fluides des collecteurs de chaleur solaire entre eux ou avec d’autres composantes, p. ex. connections de conduitsMoyens pour la répartition du fluide p. ex. boîtes de distribution
A collector element for collecting solar energy. The collector element is made of metal and comprises at least one elongated central ridge comprising at least one internal flow channel for a heat transfer medium, first and second elongated side ridges at opposite sides of the at least one central ridge and an elongated depression between each two adjacent ridges. At least one side ridge comprises at least one fastening element by means of which at least one substantially solar radiation permeable covering element is to be fastened to the collector element for covering at least the at least one elongated central ridge of the collector element.
E04D 13/18 - Aspects de la couverture de toit relatifs aux dispositifs collecteurs d'énergie, p. ex. contenant des panneaux solaires
F24S 20/67 - Collecteurs de chaleur solaire intégrés dans des constructions fixes, p. ex. des bâtiments sous forme de structure de toit
F24S 20/25 - Collecteurs de chaleur solaire pour recevoir de l’énergie solaire concentrée, p. ex. récepteurs pour centrales électriques solaires utilisant la radiation solaire directe combinée avec la radiation solaire concentrée
The invention relates to a collector element for collecting solar energy, a solar collector for collecting solar energy, a building comprising a roof and a method for transferring heat from a collector element collecting solar radiation. The collector element (1) is made of metal and comprises at least one elongated central ridge (2) comprising at least one internal flow channel (9) for a heat transfer medium, first and second elongated side ridges (3, 5) at opposite sides of the at least one central ridge (2) and an elongated depression (4,6) between each two adjacent ridges (2,3; 2,5). At least one side ridge (3) comprises at least one fastening groove by means of which at least one substantially solar radiation permeable covering element (11) is to be fastened to the collector element (1 ) for covering at least the at least one elongated central ridge (2) of the collector element (1). The collector element (2) may comprise a layer of photovoltaic material at least at a portion of an upper surface of the collector element to be arranged to the face of the sun.
F24S 10/70 - Collecteurs de chaleur solaire utilisant des fluides vecteurs le fluide vecteur circulant à travers des tubes absorbeurs
F24S 25/65 - Moyens de fixation, p. ex. moyens d’assemblage, spécialement adaptés pour supporter des modules de collecteurs de chaleur solaire pour coupler des éléments de support adjacents, p. ex. pour joindre des connecteurs profilés ensemble
F24S 10/40 - Collecteurs de chaleur solaire utilisant des fluides vecteurs dans des éléments absorbeurs entourés d'une enveloppe transparente, p. ex. collecteurs de chaleur solaire sous vide
F24S 25/40 - Agencement de montages ou de supports fixes pour des modules de collecteurs de chaleur solaire utilisant des éléments de fixation en forme de plaque, p. ex. des plaques profilées ou onduléesCadres de modules en forme de plaque
E04C 2/52 - Éléments de construction de relativement faible épaisseur pour la construction de parties de bâtiments, p. ex. matériaux en feuilles, dalles ou panneaux caractérisés par la forme ou la structure avec adaptations particulières pour usages auxiliaires, p. ex. servant au logement de conduits
E04D 3/35 - Plaques ou feuilles rigides de couverture comportant plusieurs couches, p. ex. pour l’isolation
8.
Solar collector, collector element, building roof, building, and solar energy recovery system
The invention relates to a solar collector (1) comprising a collector element plane comprising a set of parallel metallic collector elements (2) for collecting solar energy. The collector element plane, on its side to be arranged to face the sun, comprises a set of parallel, elongated ridges (R, r) formed by the metallic collector elements (2), and elongated depressions (v) between the ridges (R, r), and that at least some of the ridges (R, r) comprise therein a channel (3) for a heat transfer medium. The invention also relates to a collector element. The invention further relates to a building roof, a building, and a solar energy recovery system comprising said solar collector (1).
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