3 Not recommended on any variable flow system 4 Use if "free," such as floor piping loops 5 Use on 24/7 chilled water systems and campus distribution systems 6 Use on high head systems ([greater than or equal to]90 ft) for valves near pumps TABLE 2 Partial reheat coil
Because both the supply fan and reheat coil
will not add or remove the moisture, the supply air sa condition after the reheat coil
of the TB can be expressed as
They added refrigeration equipment with reheat coils
to solve the problems.
Most of the time, at least one of the suites will be conditioned without reheat, while the remainder of the suites may require local reheat coils
to maintain space dry-bulb temperature at the appropriate level.
As previously discussed, a VAV box with reheat coil
has capabilities to control supply air flow rate and supply air temperature through modulations of the on-board damper and reheat coil
valve to maintain the room air temperature setpoint.
An important benefit of the cycle variant and equipment modifications is augmented dehumidification capability, due to lower evaporation temperatures, that could be used in humid climate zones to replace the reheat coil
methodology, giving further energy savings and equipment cost reduction.
Figure 3a and 3b show the excitation signals for supply air flow setpoint and reheat coil
valve position, respectively.
Consider placing a single strainer for reheat systems in a location that is easily accessible as opposed to placing strainers on each reheat coil
in the ceiling space.
This system uses a central DX cooling system with modulating hot gas reheat providing full condensing at an indoor reheat coil
Each air-handling unit was modified with a reheat coil
supplied with 80[degrees]F (27[degrees]C) process water waste heat to reheat air from 60[degrees]F (15.
A discussion of the minimum outside air portion of the two fan dual duct system, the function of the air-handling unit warm deck heating coil and terminal reheat coil
will follow later after the establishment of the energy use advantages of the system.
Major Equipment Used in Building 26 Equipment Number Duct free split system 1 Air cooled screw chiller 1 Variable volume air handler unit 2 Hydronic unit heater 4 Electric unit heater 2 Electric baseboard 4 VAV box with hot water reheat coil
38 Pumps 6