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  • Users: Techcitizen
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  1. Techcitizen

    Cooling Tower operation at a lower load?

    If I run a Natural Draft Cooling Tower at a heat load lower than its capability, keeping the hot water inlet temperature same for given ambient conditions, what will be the effect on the water outlet temperature?
  2. Techcitizen

    VFD and Minimum Flow Valve

    We are looking into installing a Variable Frequency Drive for a Boiler Feed Pump. One of the issue is what to do with the minimum flow valve at the pump discharge. With VFD the pump may run at less than the discharge pr setting of the minimum flow valve in case of very low flow requirement, and...
  3. Techcitizen

    Alternative to direct Chlorination in a Cooling Water System ?

    Can somebody suggest an alternative (other than NaOCl) to direct Chlorination (which is done by mixing gaseous chlorine in water thru a ejector) for a large Cooling Water System (circulating flow of approx. 36000 cu.m/hr) ? What is your experience with such a system ?
  4. Techcitizen

    BS970/72 - 015A03 equivalent ?

    Can anybody suggest the latest equivalent in BS or ASTM for the old BS970/72 - 015A03 low carbon steel ? Will any of the EN grades match this ?
  5. Techcitizen

    Corrosion resistance of PVD coatings ?

    Can somebody tell how corrosion resistance is a PVD coating ? Can it withstand a salt spray resistance test (ASTM B117) of 2000 hours ? Which PVD coating (TiN, CrN, AlTiN, etc.) is best suited for a good corrosion resistance and what should be the coating thickness ?
  6. Techcitizen

    Coatings on aeroengine compressor blades ?

    What coatings are used on the aeroengine (commercial jets or military jets) compressor blades to guard against corrosion and erosion ? Have PVD coatings been tried ? Are they successful ?

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