Retrotec USACE - Manual (Page 10)

x ENERGY & PROCESS ASSESSMENT PROTOCOL
Figure D61. Condensation and rust on bare pipes connected to fan coil units.
Figure D62. Examples of evaporator coil refrigerant lines freezing and frosting (top left, top
right, bottom left), condenser coil frosting (bottom middle), and ice building up on
the fl oor (bottom right).
Figure D63. Refrigeration equipment used to cool food storage rooms.
Figure D64. Controls on air handling unit.
Figure D65. Heating and cooling the space at the same time.
Figure D66. Flight simulator space maintained at 68 °F when 23.9 °C (75 °F) is satisfac-
tory.
Figure D67. Air handling unit running when space is unoccupied and temperature is con-
trolled by in-room air conditioners.
Figure D68. Repaired leaking pipe segment in underground distribution system.
Figure D69. Water blowdown from boiler is discharged to nearby drain.
Figure D70. Well-maintained condensate receiver with pump to send condensate back to
heating plant.
Figure D71. Steam leak at pipe fi tting.
Figure D72. Steam trap downstream of heat exchanger that requires periodic checking for
proper operation.
Figure D73. Heating plant deaerator.
Figure D74. Overventing of deaerator resulting in ice on heating plant roof.
Figure D75. Patch on heating pipe is indication of problems with water treatment.
Figure D76. Chemical treatment system typically found in heating plants.
Figure D77. Pipes with a damaged insulation.
Figure D78. Looking at burner from inside boiler.
Figure D79. Direct drive induced draft fan on boiler.
Figure D80. Damper in boiler breeching to stop air fl ow when not operating.
Figure D81. Boiler combustion controls of an effi cient boiler.
Figure D82. Inside of boiler, showing heat exchanger tubes.
Figure D83. Damage to housing (left) of boiler (right).
Figure D84. Inside of boiler, showing water tubes and refractory.
Figure D85. Combustion gas monitors located in boiler breeching to analyze products of
combustion.
Figure D86. Steam plumes from vents at a boiler plant.
Figure D87. Steam pressure at boiler plant.
Figure D88. Steam pressure at process in building—1,103.2 kPa (160 psi) lower than boiler
pressure.
Figure D89. Building’s steam pressure reducing station and hot water heat exchangers,
where isolation valves are present.
Figure D90. Construction of underground piping valve pit showing isolation valves.
Figure D91. Combustion gas monitors for sensing the oxygen or carbon dioxide content of
fl ue gases.
Figure D92. Boiler blowdown with no provision to recover heat from hot water.
Figure D93. Boiler economizer installed in stack to preheat boiler water. Note thermometer
before economizer in stack for temperature measurement.
Figure D94. Direct drive fan on boiler that could be easily converted to variable-speed drive.
Figure D95. Damper in boiler breeching for control of fl ow of combustion gases through
boiler.
Figure D96. Uninsulated hot heating pipe poses a safety problem as well as a source of
energy waste.