1 - Alaska Energy Data Inventory

Additional stability runs were made for the expected tunnel usingsurge tanks of 6.0 ft diameter and 10.0 ft diameter (recommended surgetank). Plate 82 shows the location of stability runs and Plates 86, B5,and 83 show surge tank water surface elevations versus time for the 6.0 ft,7.3 ft, and 10.0 ft surge tank diameters.(2) Governing Stability:a. Background - For stability runs, the "WHAMO" program bringsinto play various governing equations which require eight coefficients.These coefficients are functions of the following governor settings:promptness (Tg), dashpot relaxation (Tr), permanent speed droop (0") andtemporary speed droop (~). The temporary speed droop is a function of themechanical startup time (Tm), and the water startup time (Tw). When using"WHAMO" on the Harris system here in Anchorage, the user inserts the eightcoefficients into the program. When using "WHAMO" on the AMDAHL system inPortland, the user may insert the four variables (Tg, Tr,O" and (J ), or theeight coefficients as on the Harris system. Because of its convenience, wehave consistently used the Harris system here in Anchorage with theaccompanying eight coefficients.following values:b. Stability Runs - initial stability runs were made with theGovernor SettingsCoefficients used for"WHAMO" Input onHarris SystemTm = 6.33 S AONE = 0.0TW = 0.55 S ATWO = 1.0T9 = O. 15 S ATHREE = 2. 18Tr = 3. 19 S AFOUR = 0.104(5"= 0.05 AFIVE = 0.0)f = 0.23 ASIX = -10.64ASEVEN - - 3.34AEIGHT = 0.0Using the above data, "WHAMO" showed surge tank instability for tanksranging in size from 6 ft to 20 ft diameter. HEDB suggested that weBl-32