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
Smart buildings through innovative membrane roofs and façades
31.08.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Concrete from wood
05.07.2017 | Schweizerischer Nationalfonds SNF
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
23.10.2017 | Event News
17.10.2017 | Event News
10.10.2017 | Event News
23.10.2017 | Physics and Astronomy
23.10.2017 | Earth Sciences
23.10.2017 | Health and Medicine