New heat accumulator system for the network-independent installation under buildings by means of vertical terrestrial heat spiral collectors and an aerated concrete/a water heat accumulator medium

New terrestrial heat spiral collector with aerated concrete/water heat accumulator coat - the advantage this new vertical terrestrial heat spiral collector (EWK) technology in relation to past terrestrial heat probes (EMS) and other compact collector designs consists of the fact that thereby now comparatively effective and more economically decentralized and thus network-independent short and long-term heat accumulator also under covered urban infrastructures, respectable directly under buildings, in according to smaller units and operated can be created, because the new spiral collector

-- simply to insert and maintenance-free operate is,
-- is compromiseless coverable,
-- is surrounded with a solid water/heat accumulator body,
-- Water if necessary additionally controlled to the surrounding soil to deliver can.

Thus up to the owner of single family house in the future a further important component is to the individual building operator for the self-sufficient and enterprise of its own modern warming and refrigeration supply plant independent of large heat suppliers at the disposal.

Knowledge level:

As well known the most regenerativ and sources of environmental waste heat need a quite large heat accumulator for the of them really more efficiently, i.e. as far as possible all-season use to adjust in order to supply procedure and operatingcaused as well as seasonal temperature and power fluctuations and an even individual use meeting demand. This applies in particular also to the use of the solar power. Therefore the heat storage is the technological key to in principle the meaningful development of alternative energies.

In particular it applies to develop the seasonal long-term heat storage in this connection more simply and more efficiently in the purchase even on smaller storage volumes, so that this is available then also network-independent, i.e. decentralized with shortest routings and according to small calorific losses also under individual buildings in the existence. A condition for this is however a modern building building method with smallest possible power requirement. Also the memory technology should be coverable accordingly problem-free and without considerable additional expenditure, so that for this no area needs to be taken in the buildings more in requirement. This applies to in and multi-family houses as also to commercial buildings.

The earth area under buildings can be used in principle very well as sources of energy or long-term energy stores. By the seasonal heating of the cities over the sun irradiation in the summer, the earth layers are loaded under it in our widths with temperatures up to 20 C. And this warmth can flow off in the winter only very slowly, because the soil has a bad heat guidance characteristic, and the earth area upward is locked by covering. On the other hand it is downward infinite and/or at least up to the ground-water level open, and can expand accordingly its storage capacity as required. Each city with its underground represents thus an enormous, so far not yet being entitled used geothermal energy store. Also the there Grundwasserstand lowered itself due to missing rain infiltration mostly quite deeply. That is positive for the natural water regime and a pure terrestrial heat production surely unfavorably, however for the use as heat accumulators rather, because thereby a drain of larger energy quantities is avoided over the groundwater. This presupposes however that such a memory system for use inferred the warmth is also again supplied from the outside. If the seasonal loading is not sufficient over urban covering in this case, additional energies from regenerativ and existing sources of environmental waste heat must be stored. The energies best suitable for this system for feeding are probably the Solarthermie and the waste heat from the building cooling. In the same way naturally also cold weather can be stored and inferred again, what the need becomes by the way increasing, if the buildings receive a ever more closer and better thermal insulated to covering.

For the activation and the enterprise of geothermal energy stores so far earth warming probes were used, which are abgeteuft very deeply and with good reason high expenditure into the earth area, and therefore relative to the usable heat produce quite expensive in the production are. Further this technology is not always applicable on the part of geology and/or regional water-legal regulations, because it damages natural soil layerings perforated and thus lastingly. Permission is lengthy, and the construction period usually at longer term, because the drill companies are overloaded at least at present.

The aforementioned disadvantages calculation basic one has therefore in the meantime more space-saving and more compact, i.e. accordingly also shorter terrestrial heat probes to develop to make applicable in order to reduce primarily the expenditure and the costs of such plants, in addition, around these techniques from the structural side more flexibly and accordingly everywhere. Also this technology is as far as possible released from official regimentation, and/or requires at present only a formal request. Because thus this technology becomes interesting only also for the small building operator.

These so-called terrestrial heat spiral or spiral collectors was originally also only for the installation under open surfaces up to a depth from 3-5 m meant, because still another natural regeneration of the soil over the sun exposure and rain infiltration takes place there, and either horizontal in the ditch or in vertical Erdbohrungen is in-feasted. In the USA these collectors are well-known also under the designation SLINKY Collector , and there already belong to the state of the art.

The vertical execution can be inserted due to its relatively short overall length however also very well under covered surfaces, if certain conditions are kept. The for this necessary simple well drillings are simple to manufacture, and impair the firmness of the building ground not considerably, since the drilling is statically stably filled after bringing in the collector again. However there, as already mentioned, no natural regeneration of the soil finds instead of, so that the collector must be laid out both for the heating, and the cooling load enterprise (condition), i.e. for the enterprise of a geothermal energy store is intended. In order to create such a memory, before production of the building a field is equipped by well drillings with such collectors, which can have all a depth and/or a length to scarce over the ground-water level. Since under covered urban infrastructures, as, lowered themselves the groundwater said quite deeply, these drillings can be also deeper than 5 m. Accordingly longer and more efficiently are then also the collectors.
Apart from the fact, such collectors can be set also very effectively consciously into the groundwater, if only a heat extraction and no heat storage are planned.

The further advantage of these spiral collectors is in which they have according to its compactness also a comparatively very high specific heat transfer surface and thus achievement. This achievement can be only effectively used however, even if the ground makes available the appropriate amount of heat in a certain time unit (unloading) and/or also again takes up (loading). And this depends completely on the heat photograph capacity and the heat conductivity of the soil. Accordingly the different condition of the underground is called, differentiated according to soil types and its specific extraction of heat achievement, also source achievement. For example a damp soil has in this connection ever better characteristics as a dry soil. And the latter is found unfortunately with priority under buildings due to the cover and ground-water lowering. - It requires thus a solution, which makes an additional humidification possible of the soil area under buildings, without limiting thereby the establishment of the building statically

Solution - new building material for the water and heat storage:

Orange depot & Exchange of system have for this a new building material developed, which already alone due to its firm structure are statically coverable, and with a greatest possible quantity of water can be satisfied at the same time. The building material is particularly for this purpose modified mortars or concrete, similarly the conventional aerated concrete, however with finest pores and capillaries equipped, which do not only take up the water to the building material structure on their part from ready, but also with own Kraft in it as far as possible to hold can. The tied and/or hardened building material can be coated if necessary still with an outside barrier layer, in order to seal the solidium and/or water reservoir created thereby more or less once again. Because the raw and then building material satisfied with water has to deliver the characteristic over its capillary of this also again outward in very small quantities continuously, which can be very well steered with an outside coating, preferably also a mortar, i.e. braked accordingly or prevented. This gradual Ausschwitzen of water is suitable with in ideal way to dampen the lying close soil thereby easily in order to be improved as initially described, its thermal characteristics without affecting the statics of the building ground unfavorably.

This material is economically and simply in almost any desired arrangement and dimension applicable, and can be made available to the precasting plant prefabrication as supply or local concrete. It has a very low specific dry weight due to its high pore portion. It is processable freshly set also in large quantities, and can after shortest hardening time briskly with water filled, and afterwards with a building to be covered. The building material has an optimal specific heat accumulator capacity and heat conductivity by the high Wasseranteil. The building material is steady to the memory water and the surrounding soil conditions (groundwater, soil) with the given operating conditions. The life span corresponds to the usual requirements in the high and/or foundation engineering. And the pressure strength can be stopped depending upon project requirement. The building material is environmentalcompatible. Chemical and/or biological lining formation or corrosion is not to be expected, since it acts here around a resting and in the soil included storage medium with indirect and unloading over a heat exchanger tubing system.

The actual heat exchanger tubing system is made of plastic (preferably PEX) and positively into the concrete mass concretes. This can take place in two execution variants (to A or B, see attached picture):

On the one hand the spiral collector can be integrated in the work completely into the concrete body, and be delivered as finished system part to the building site (A 1). The system part is then inserted directly into the prepared Erdbohrung, and in-feasted in it concisely with the building ground (a2).
On the other hand the actual spiral collector can be inserted directly into the Erdbohrung, and be poured then only in it with the building material positively (B).
The work prefabrication has the advantage that the concrete body bedarfsweise can be equipped still with an additional outside barrier layer, and in the long run a reproducible and quality-secured complete system represents. On the other hand locally no additional outside coating is possible with the production, so that no complete sealing can be achieved. However always surplus bonding agent suspension penetrates into the adjacent soil with this manufacture way, so that with the soil a concrete bowl forms there, which encases and up to a certain degree seals and stabilizes the concrete body additionally.

The main advantage in relation to the past installation way of spiral collectors consists of it that this execution is surrounded as protective shell now additionally with a defined concrete body, at the same time as water reservoir for the more effective heat transfer and additional heat storage functioned. In addition the bedarfsweise heat transfer surface and the heat accumulator capacity can be increased at will over the organization of the concrete body. The concrete body ties up the spiral collector absolutely positively to the grown soil of the earth area and/or geothermal energy store, and at the same time the surrounding soil is additionally dampened.
If the concrete body is completely satisfied with water, the building mat foundation is concreted over it. Of course still another a suitable Feuchtigkeitssperrschicht and thermal insulation must be planned between the mat foundation and the appropriate collector field and/or the geothermal energy store created thereby. It is advisable to set if necessary the collector head in still additionally with a simple concrete ring concisely.

The necessary pipe connections for the collector, consist of the advance and return for the heat exchanger fluid (water glycol mixture) and the filling mechanism for the memory water. These are at the collector head, and can be shifted from there on the shortest way under the mat foundation into the building present over it.

Appropriate arrangements of such terrestrial heat spiral collectors can serve for it both a certain earth area under a building and geothermal energy store to open form and a larger buffer memory let in under the building in the soil which does not need to be accommodated then in the building. Even a hybrid memory system can be created by combination of both variants. This execution form represents so far the innovativste in this area, because in this case of the buffer memories become no longer thermal insulated needs.

Are not suitable particularly favourably for this made a cellar under buildings and/or also or local flat and hall constructions commercial in particular (resound, purchase markets, swimming pools, sport and meeting resounding etc.), which have changes relative to the area a large reason and roof area, and mostly also still are equipped with larger park surfaces. Over these collectors now each building knows its surplus energy from solar collectors, which building waste heat etc. on shortest distance, i.e. with smallest calorific losses, into its own independent geothermal energy store to store. This makes an extremely economic optimization possible of such plants. However in order to be able to operate this quite complex overall system perfectly, it requires an appropriate energy management system (EMS) depending upon requirement, which depending upon plant concept bi or multivalente boilers (heat pump, Brennwertkessel, BHKW, biomass boiler etc.) supplementing to be provided to be able

The technology is in the prototype phase. For the locking development to ready for the market one and the following common international marketing look for orange depot & Exchange of system at present for suitable partners.

TEC MANAGEMENT
Dipl. - engineer Michael Henze
Orange depot & Exchange of system
Main ring 10
D-63500 blessed city
Germany

Tel: +49 (0) 6182/897967
Fax: +49 (0) 6182/897968
Email: tec-management@t-online.de

TEC MANAGEMENT is an engineer's office for environmental technology in the range of underground infrastructures, and among other things specializes in earthcoupled decentralized heat accumulator and earth heat exchanger systems.
Under the name orange depot & Exchange system become the products in this connection developed, procedures, and systems publicised and at given time markets.

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