W/(m 2 K) Btu/(ft 2 o F h) Tubular, heating or cooling Gas at atmospheric pressure inside and outside tubes 5 - 35 1 - 6 Gas at high pressure inside and outside tubes 150 - 500 25 - 90 Liquid outside (inside) and gas at atmospheric pressure inside (outside) tubes
SYS-APM001-EN Chiller System Design and Control 1 Primary System Components Chilled-water systems consist of these functional parts: † Chillers that cool the water or fluid † Loads, often satisfied by coils, that transfer heat from air to water † Chilled-water
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Relay symbols and device numbers; selection from IEC 617-, IEEE C37.2-1991 and IEEE C37.2-1979 1MRK 590 006-BEN Page 3 Test switch contacts 1. Break-contact (voltage supply circuit), late opening and early closing upon insertion and withdrawal
4-1 Designing Planar Magnetics Lloyd Dixon, Texas Instruments ABSTRACT Planar magnetic devices offer several advantages over their conventional counterparts. This paper dis-cusses the magnetic fields within the planar structure and their effects on the
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2016/10/28 · Figure 1 – Typical Control Transformer Magnetic field from primary winding induces voltage in the secondary winding.Applying AC voltage to the primary winding of the transformer causes alternating current (AC) to flow in the winding.This produces a magnetic field that extends outside the winding, in the shape of concentric loops as shown in Figure 2.
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T – Transformer Electrical Basics Sample Drawing Index Basics 1 Overall Plant 1-Line Basics 2 7.2 kV Bus 1-Line Basics 3 4.16 kV Bus 1-Line Basics 4 600 V 1-Line Basics 5 480 V MCC 1-Line Basics 6 7.2 kV 3-Line Diagram Basics 7 4.16 kV 3-Line
EMF Equation of Transformer N 1 – number of turns in primary. N 2 – number of turns in secondary. Φ m – maximum flux in weber (Wb). T – time period. Time is taken for 1 cycle. The flux formed is a sinusoidal wave. It rises to a maximum value Φ m m. So, flux
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Transformers and Long-Distance Power Transmission. Transformers are devices which use mutual induction to change the voltage and current of an AC circuit. A transformer with primary coil of Np turns and secondary coil of Ns turns will have ratios of voltage and current. Vs Ns Ip ---- = ---- = ---- Vp Np Is.