Abstract: The neat and nanoclay polyurethane syntactic foams were prepared to investigate the effects of microballoons and nanoclay on their properties. The desired densities of all syntactic foams were 0.6 g/cc. The microballoon loadings filled in the neat syntactic foams were 3, 5, 7 and 9 wt%. All nanoclay syntactic foams contained 7 wt% microballoons. The nanoclay loadings used to produce the nanoclay syntactic foams were 0, 0.5, 1, 2, and 3 wt%. The compressive properties and hardness of the syntactic foams were examined. It was found that the hardness and compressive strength of the neat syntactic foams significantly enhanced as increasing the microballoon contents. For the nanoclay syntactic foams, the compressive strength decreased with the incorporation of the nanoclay. Specific hardness of the syntactic foams was, however, enhanced by the addition of nanoclay.

• Publication Date: 04-May-2014
• DOI: 10.15224/978-1-63248-013-2-32
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Abstract: Construction of new power plants and regulatory process for permit issuance take a long lead time and sometimes do not match the demand of electricity. Therefore, an efficiency improvement with minor modifications on existing power plants can be an attractive option for taking less time and investment. Power plants with higher efficiency consume less energy or gain more power output generation, and inevitably require more investment. Performance enhancement options must be economically retrofitted to increase power output and efficiency. In practice, cost effectiveness is used for the justification of the different modifications.

• Publication Date: 04-May-2014
• DOI: 10.15224/978-1-63248-013-2-33
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