When it is very warm outside, the air conditioning system takes care of a consistently cool room climate inside the house. The water paraffin mixture CryoSol®Plus could make the purchasing of an air conditioning system for office buildings superfluous in the future and at the same time considerably unburden the power grids. Fraunhofer UMSICHT is researching areas of use for phase change slurries (PCS).
Cryosol®Plus looks like milk. But don't even think about drinking it. While the composition made of paraffins and water is non-poisonous, it still isn't all that tasty. Paraffin is known as wax or as maintenance oil in Vaseline. In CryoSol®Plus, the paraffins serve – finely dispersed – as phase change material (PCM) for heat and hold storage.
The principle: When the dispersion absorbs heat, the solid tiny paraffin balls "melt" into paraffin droplets and store the heat. Once the solution cools down, the droplets become solid again. In CryoSol®Plus, the paraffin exists finely dispersed in water as a heterogeneous blend of substances.
CryoSol®Plus – two to three times the energy density of water
Jointly with the RWTH Aachen university, Fraunhofer UMSICHT has researched the utilization of CryoSol®Plus in supply systems. In principle, the blend can serve as heat transfer fluid, as storage medium for thermal systems, and for cooling. "In a temperature range from 5 to 20 degrees Celsius it is a good alternative to cold water, since it features a two to three times higher energy density", explains Dipl.-Ing. Tobias Kappels, researcher in the Thermal Energy Storage and Systems group.
In the project, the dispersion was utilized for the storage of nocturnal cold to then dissipate it during the day on a room-by-room basis via capillary tube mats in the ceiling. The idea for constructing the capillary tube mats originates from nature and corresponds to the network of fine nervous system under our skin which not only provides us with nutrition but also serves to regulate body heat. In buildings, the capillary tube mats in ceilings, walls, or floors are utilized for combined area heating or cooling.
Higher transport capacity, better storage
In the project, the dispersion was manufactured, characterized, and tested in a heating/cooling system, and the substance properties of the dispersions were modeled. The utilization of CryoSol®Plus could significantly increase the transport capacity and storage capability of a distribution network.
The utilization of the dispersion is of interest especially to the manufacturing industry, air conditioning, chemical and automotive industry as well as for cooling devices in the foodstuffs industry.
The project was funded for four years in the context of the framework program EnEff: Wärme (Energy Efficiency: Heat) by the German Federal Ministry of Economics and Technology (funding ID 0327471A).
Iris Kumpmann | Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
Further reports about: > Air > Economics > Energietechnik > Energy > Thermal > UMSICHT > air conditioning > automotive industry > body heat > capacity > cooling devices > cooling system > distribution network > energy density > heat transfer > manufacturing industry > nervous system > phase change material
Concrete from wood
05.07.2017 | Schweizerischer Nationalfonds SNF
Modular storage tank for tight spaces
16.03.2017 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
21.08.2017 | Materials Sciences
21.08.2017 | Health and Medicine
21.08.2017 | Materials Sciences