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<br />0') <br />,. <br />.... <br />~ <br />('J <br /> <br />~. <br /> <br />CONTENTS <br /> <br />XIII <br /> <br />CHAPTER IX-LAYOUT AND OPERATION OF THE <br />HOOVER DAM COOLING SYSTEM <br />SectiGfl Pag~ <br />87. Layout of cooling system__u___n______~n_n________n________ 163 <br /> <br />COOUNG PLANT EQUIPMENT <br /> <br />88. Required ca.pacity of cooling plant____________________________ 164 <br />89. General description_ _ _ _ _ __ _ __ _ ___ n_ ___ h_ _ __ _ _ _ __ ____ h____ ___ 166 <br />90. Cornpressors__________________________________________________ 168 <br />91. High-pressure oil sepa.ra.tor________________________________u___ 169 <br />92. Condensers___________________________________________________ 169 <br />93. Receivers___ ____ ____ _ ____ _ _ __ ___ _ _ _ ___ _ _ __ _ _ ____ _ _ ____ ___ __h 169 <br />94. Purging regenerator _ __ ___ _ _ __ ________ _ _ __ _ _ __ _ ___ _ _ __ _ _ _ _ _____ 170 <br />95. AccuInulator_________________________________________________ 170 <br />96. Coolers______________________________________________________ 170 <br />97. Pipes and fittings_____________________________________________ 170 <br />98. Alarm and control devices______________________________________ 171 <br />99. Purnps_________________________________,_____________________ 172 <br />100. Cooling tower _ _ _ _ ___ ____ __ _ _ __ _ _ ______ __ ___ _ _ ____ ____________ 173 <br /> <br />COST OF COQUNG CONCRETE <br /> <br />101. Estimated and actual costs_____________________________________ 174 <br /> <br />CHAPTER X-COMMENTS ON THE DESIGN AND <br />OPERATION OF A COOLING SYSTEM <br /> <br />GENERAL CONSlDERATIONS <br /> <br />102. Possibility of converting air compressors to refrigeration machines___ 177 <br />103. Determination of temperature schedule__________________________ 177 <br />104. Measurement of temperatures attained by cooling_ __ __ _ __ __ __ __ _ __ 178 <br /> <br />CONTROL OF THE COOLlNG RATE <br /> <br />105. Possible means of controlling cooling rate _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 180 <br />106. Effect of varying the pip~ spacmg_____________________u________ 180 <br />107. Effect of va.rying the quantity of water supplied__________________ 181 <br />108. Effect of varying the length of pipe coils_________________________ 183 <br />109. Effect of varying the size of cooling pipe_________________________ 183 <br /> <br />THE COOUNG SYSTEM <br /> <br />110. General a.rrangement of cooling pipe_____________________________ 184 <br />111. Cross connecting of headers______________-.___________..,._________ 187 <br />112. Insulation of headers__________________________________________ 190 <br />113. Control of water supply to coils_________________________________ 191 <br />114. Protection against leakage of water______________________________ 191 <br />115. Protection of plant against loss of refrigerant_____________________ 192 <br />116. Closed and open pumping systems______________________________ 192 <br />117. Thermal stresses around cooling pipes___________________________ 193 <br />118. Cooling tower performance_____________________________________ 195 <br />