MT 518 HW 6 Prob. Solutions

MT 518 HW 6 Prob. Solutions - Page 1 of 3 MT 518 Homework...

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MT 518 Homework Problem Solutions – Lecture #6 6.1 What should you be considering when selecting a heat transfer fluid for a solar hot water heating system in the New York City area. The following design parameters should be considered in selecting an optimum solar heat transfer fluid: A liquid range of -50ºF to 400ºF with a flat temperature/viscosity slope, avoiding freeze damage and minimizing flow rate variations. A non-ionic, high-dielectric, non-aqueous, non-reactive, stable fluid which does not corrode copper, aluminum, or steel. A flash and firepoint exceeding 400ºF. A low vapor pressure at 400ºF. A material which is non-corroding, non-dissolving and non-staining to wood, concrete, paint, plastic and asphaltic materials of house construction. A fluid stability of 10 years or longer at operating temperatures of 150º-200ºF and able to withstand extended static temperature exposure up to 400ºF without degradation. A non-toxic material having no adverse environmental or biological
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MT 518 HW 6 Prob. Solutions - Page 1 of 3 MT 518 Homework...

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