{"id":1514,"date":"2025-01-31T09:06:54","date_gmt":"2025-01-31T08:06:54","guid":{"rendered":"https:\/\/www.geowaermewende.de\/?page_id=1514"},"modified":"2025-01-31T11:08:51","modified_gmt":"2025-01-31T10:08:51","slug":"glossar","status":"publish","type":"page","link":"https:\/\/www.geowaermewende.de\/en\/glossar\/","title":{"rendered":"Glossar"},"content":{"rendered":"
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Glossar<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tLow temperature district heating and cooling (LTDHC)<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

A type of heating network that is operated at a low temperature level (approx. 5-15\u00b0C). The system uses uninsulated pipes in the ground and supplies decentralised heat pumps in the connected buildings with environmental heat.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tCold local heating<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Heat supply concept with low distribution temperatures and decentralised temperature increase.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tBrine\/water heat pump<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

A heat pump that absorbs heat from a brine-water mixture (the heat source) and raises it to a higher temperature level for heating and hot water. In the LTDHC, it is installed as a decentralised unit in each building.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tJahresarbeitszahl (JAZ)<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Kennzahl f\u00fcr die Effizienz einer W\u00e4rmepumpe \u00fcber ein ganzes Jahr. Sie gibt an, wie viel W\u00e4rmeenergie pro eingesetzter elektrischer Energie erzeugt wird. Je h\u00f6her die JAZ, desto effizienter arbeitet die W\u00e4rmepumpe.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tGeothermal probe<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t


Vertical borehole (usually 50-200m deep) with an integrated heat exchanger pipe system for utilising geothermal energy. Used in the LTDHC as an additional heat source alongside the collector network.
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tCollector function<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The ability of the uninsulated pipework in the LTDHC to act as a ground heat exchanger itself and to absorb heat from the surrounding ground or release it to it.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tBidirectional operation<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The system's ability to transport heat in both directions - from the ground to the buildings for heating in winter and from the buildings to the ground for cooling in summer.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tSeasonal storage<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The ground around the pipework, which serves as a natural heat store. Heat stored in summer can be partially utilised again in winter.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tFlow temperature<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The temperature of the heat transfer medium (brine) when it enters the heat pump from the network.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tReturn temperature<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The temperature of the heat transfer medium after it has passed through the heat pump and flows back into the network.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHeat transfer medium<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The fluid that circulates in the LTDHC - usually a mixture of water and antifreeze (brine) to ensure safe operation even at temperatures below 0\u00b0C.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHydraulic balancing<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Regulating the network so that all connected buildings are supplied evenly with the required heat source output.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tGeothermal response test<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Measurement method for determining the thermal properties of the subsurface, important for the dimensioning of geothermal probes and the simulation of the overall system.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tLow-temperature heating system<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Heat distribution system in the building (e.g. underfloor heating) that can be operated efficiently with low flow temperatures - ideal for operation with heat pumps.<\/p>

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tLow-temperature heating<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Heating system with flow temperatures below 55\u00b0C.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tSimultaneity factor<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Key figure that indicates the maximum number of heat pumps that are active in the network at the same time. Important for dimensioning the overall system.<\/p>

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHeat load<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The heat demand of a building, which is made up of the heating load and hot water demand.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tPassive cooling<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Direct utilisation of the cool brine from the network to cool the building without active operation of the heat pump, very energy-efficient.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tMains hydraulics<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

The interplay of pressures and volume flows in the pipework system is important for the even distribution of thermal energy.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHouse transfer station<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Technical equipment for the transition from the local heating network to the domestic installation.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tLowEx network<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Heating network with a low exergy level (low temperature), synonymous with cold local heating network.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tSystem temperature<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Temperature level in the distribution network (typically 8-20\u00b0C).<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tTemperature spread<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Temperature difference between flow and return in the network.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tEnvironmental heat<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Thermal energy from the environment (soil, groundwater, air).<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHeat exchanger<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

Technical device for heat transfer between two media without direct mixing.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Glossar Kaltes Nahw\u00e4rmenetz (KNWN) Ein W\u00e4rmenetztyp, der auf niedrigem Temperaturniveau (ca. 5-15\u00b0C) betrieben wird. Das System nutzt unged\u00e4mmte Rohrleitungen im Erdreich und versorgt dezentrale W\u00e4rmepumpen in den angeschlossenen Geb\u00e4uden mit Umweltw\u00e4rme. Kalte Nahw\u00e4rme W\u00e4rmeversorgungskonzept mit niedrigen Verteiltemperaturen und dezentraler Temperaturanhebung. Sole\/Wasser-W\u00e4rmepumpe Eine W\u00e4rmepumpe, die W\u00e4rme aus einem Sole-Wasser-Gemisch (der W\u00e4rmequelle) aufnimmt und auf ein h\u00f6heres […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"folder":[],"class_list":["post-1514","page","type-page","status-publish","hentry"],"yoast_head":"\nGlossar - www.geowaermewende.de<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.geowaermewende.de\/en\/glossar\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Glossar - www.geowaermewende.de\" \/>\n<meta property=\"og:description\" content=\"Glossar Kaltes Nahw\u00e4rmenetz (KNWN) Ein W\u00e4rmenetztyp, der auf niedrigem Temperaturniveau (ca. 5-15\u00b0C) betrieben wird. Das System nutzt unged\u00e4mmte Rohrleitungen im Erdreich und versorgt dezentrale W\u00e4rmepumpen in den angeschlossenen Geb\u00e4uden mit Umweltw\u00e4rme. Kalte Nahw\u00e4rme W\u00e4rmeversorgungskonzept mit niedrigen Verteiltemperaturen und dezentraler Temperaturanhebung. 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