| Abstract | The central focus of this paper is the operation and control
of a total energy recovery device, or enthalpy wheel (EW),
during the heating and intermediate seasons when the outside
dew-point temperature (DPT) is below the desired supply air
DPT. For the most part, control of the EW during hot and humid
conditions is being executed properly. On the other hand, experience
has shown that the heating season operation is an
important and frequently ignored aspect of the energy recovery
operation. Consequently, the benefits that are available with
proper EW control and operation during the “noncooling”
season have been overlooked. So there are no simple and
universally accepted EW humidification performance control
sequences currently in existence for low DPT, outdoor air
conditions (i.e., dry outdoor air conditions). After providing an
overview of EW fundamentals, a simple binary EW control is
introduced and evaluated in a university campus facility for
humidification under dry outdoor air conditions. It was found
that use of an EW can reduce the energy consumption for
humidification but does not eliminate the potential need for an
auxiliary humidifier. Finally, binary control of the EW for
supply air temperature control is also addressed. |
|---|
