Perfect Three Way Valve by International Energy Agency The valve is assumed to be a perfect three-way valve. It has the following hydraulic characteristics: Kv,s = 7.850 m**3/h, Kv,o = .157 m**3/h The valve has a logarithmic characteristic for the direct flow and a linear characteristic for the bypass. t2 < tset < t1 dM1 = dM2*(tset-t2)/(t1-t2) tw = tset tset < t2 dM1 = 0 tw = t2 tset > t1 dM1 = dM2 tw = t1 Ref: IEA ANNEX17: BEMS Synthesis Report Univ. of Stuttgart June 27, 1991 AN17-910627-01 IEA Report AN17-900425-02 RCHAUM 17 May 1991 IEA Report AN17-880725-01 SCHAUM 2