WATERPROOF MEMBRANES | MATERIALS
Waterproof membranes, which are commonly used in applications like mining, are finding use in new areas such as renewable energy – as well as being more efficiently recycled
Soil improvement: latest in waterproof membranes
Geomembranes are used in a host of well-estab- lished applications, including mining and reser- voirs. In mining, the waterproof membrane typically ensures that contaminated water is contained – and does not leach into the surrounding environment. In reservoirs, it helps to retain as much water as possible. Emerging industries also create new uses for this
type of membrane – such as a recent example involving a district heating system. VEKS, a district heating supplier based in Denmark, stores excess heat from combined heat and power plants and waste incineration plants in a new type of pit thermal energy storage – which is lined with a high-temperature-resistant geomem- brane from Agru of Austria. Storage systems are necessary for the integra-
tion of renewable energy sources. Buffer storage tanks can cover peak loads at short notice and at the same time optimize the operation of heat
www.filmandsheet.com
generation economically. Storing hot water generated with solar thermal energy could reduce CO2 emissions – but buffer storage systems with weekly cycles are also important to optimise district heating networks. Pit thermal energy storage (PTES) represents a
revolutionary approach to energy storage. Thermal energy – bound in water – is temporarily stored in a pit in the ground, such as in the VEKS project in Høje Taastrup in Denmark. This actually goes a step further, by also temporarily storing heat from four biomass-fired CHP plants and three waste incinera- tion plants. This makes it possible to use the system in Høje Taastrup as a buffer storage tank with 25 to 30 charge and discharge cycles per year. As a result, peak loads can be covered, and peak load systems saved. The pit in Høje Taastrup has a capacity of 70,000 cubic meters of water. An essential part of the PTES system is its geomembrane. A water temperature of
Main images: Solmax has recycled geotextiles from a temporary road back into
pellets to make new products
May 2024 | FILM & SHEET EXTRUSION 13
IMAGES: SOLMAX
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46
