Leverkusen, Germany - Bayer MaterialScience is employing its polyurethane technology in an increasing number of cooling applications in the Middle East.
BaySystems Pearl, the PU business of BMS, is supplying two PU spray systems to Dubai-based Ayadam Trading llc to seal and insulate specialist cold water holding tanks for a district cooling network in Nad-Al-Shea-Meydan District, Dubai BMS said 23 Nov. District cooling systems involve a small number of large cooling plants that pump liquid coolant through a network of insulated pipes to buildings needing to be cooled. According to BMS, this process is "far more efficient than running several small, on-site air-conditioning units and thus makes an important contribution to climate protection."
The steel water tanks are insulated on the outside with a spray polyurethane foam (SPF) system Baymer Spray at a low density of 40 kg/cu.m before being sealed with a Baytec spray elastomer to protect the foam from condensation and mechanical loads, the statement said, adding that this method had been applied to tanks with volumes of up to 7500 cu.m.
Ayadam Trading's managing director, Amir Adib said that the innovative insulation concept has impressed water and power engineering contractor, Drake & Scull, and as a result is being implemented in other projects in the United Arab Emirates (UAE) and Saudi Arabia.
Another large project taking place in the Middle East which is utilising PU cooling technology is the construction and expansion of the subway network in Dubai.
The network, which will consist of four lines covering 200 km by 2020, is using rigid polyurethane foam-based insulation from BaySystems Pearl to help district-cooling technology keep the mostly overground network cool in the Middle Eastern heat.
Abu Dhabi-based Tabreed has been appointed to run the district-cooling network while Emirates Preinsultaed Pipes Industries llc (EPPI), also based in Abu Dhabi, was awarded the contract to manufacture the 91 km of piping needed to supply the facilities, BMS said. "We are a pioneer for environmental protection in the UAE and have for many years been using water-based polyurethane insulation systems that do not harm the ozone layer," said Ghassan Sahli, general manager of EPPI.
The pipes, which 12 m in length, consist of a steel inner pipe, a 5-7 cm thick layer of Baytherm PU insulation and a 3-5 mm thick casing made from high-density polyethylene. (RD)