Rainwater Harvesting

In the neighborhood where I grew up as a kid, many of the houses have metal barrels that collected water off the gutter from the roof to be used for bathing, washing and laundry. These days many facilities use the same principles to collect rainwater to augment their water supply from rooftops, land surfaces and rock catchments.

AEMAS National Conference

The ASEAN Energy Management Scheme (AEMAS) recently conducted a National Conference at the Oakwood Premiere Hotel in Ortigas Center, Pasig City, M.M. through the Philippine Society of Mechanical Engineers (PSME) last January 27, 2014.

Cooling Water Treatment Chemistry Control & Monitoring

The second law of thermodynamics says that to produce work in a cyclic process, waste heat have to be rejected to the external surroundings. One equipment normally used to release heat back to the environment is through a closed loop cooling water system using a tower and a heat exchanger.
Waterside fouling and/or scaling can seriously affect the heat transfer efficiency and increase operating costs. Scaling can result when the dissolved solids reached saturation in the water. In cooling tower, water is evaporated to cool its temperature when latent heat is absorbed by the water when it changes state. The solids are left behind during this process. With the addition of make-up water to replenish the amount evaporated, the amount of dissolved solids increases. Blowdown helps control excess dissolved solid buildup. However, blowdown by itself is not the solution to scaling problem as several compounds in solution will have exceeded saturation level and precipitate out of solution on the heat exchange surfaces.