An Environmentally Friendly Idea for Cooling of Water in Water-Cooled Chillers in Urban Areas
Rahim Hassanzadeh1*, Mohammad Shams2, Mohsen Darvishyadegari1
Citation : Rahim Hassanzadeh, Mohammad Shams, Mohsen Darvishyadegari, An Environmentally Friendly Idea for Cooling of Water in Water-Cooled Chillers in Urban AreasInternational Journal of Advanced Research in Physical Science 2018, 6(1) : 7-18.
It is known that wet cooling towers in the air-conditioning systems are the considerable pollutants in urban environments. In addition, they consume significant amount energy in buildings due to large-scale axial or radial fan operation and also pumping systems for circulating the water between the chillers and cooling towers which are normally installed at high elevations. This paper presents a new idea for reducing the initial and ongoing costs along with the clean production of the cooling water requirement in the condensers of the air-conditioning systems. Considerations are restricted for chillers with an actual capacity of less than 50 tons of refrigeration (TR). The idea is the construction of a ground source heat exchanger (GSHE) under the building foundation and integrating the constructed GSHE with a water cooled chiller. For this purpose, conventional polyethylene and also heavy grade galvanized pipes are assessed for GSHE. On the other hand, computations are performed for three various soils such as clay, sandy clay, and siltstone having the thermal conductivities of 0.8, 1.9, and 3.2 W/mK, respectively. It is found that using this new method, the wet cooling tower can be eliminated from the air- conditioning systems and the replaced GSHE can handle safely the cooling water needs.