Note that for both sizing modes, although coil contact factor is specific or determined at the design point, in the simulation contact factor will vary as coil operating conditions change. In the second mode, Manual sizing, the user specifies both airsidewaterside conditions (and the coil Contact factor is determined from these parameters). To provide user flexibility two sizing methods (modes) are available: Autosizing and Manual. With these design point characteristics, the cooling coil can then be more accurately modeled at both design and off-design operating conditions. In this context, size refers to determining the coil heat transfer characteristics at a design point. The Advanced model uses more detailed coil design parameter specification and enhanced heat transfer modeling capability. See the section on DX Cooling for further description of this. The Simple coil is useful early in the design and modeling process when detailed coil data or performance is not required. This facilitates more accurate determination coil design and off-design performance.Īn HVAC system configuration can contain both Simple and Advanced models, however, individual multiplex layer instances of a coil occupying a particular location must all be of the same coil model type (i.e., all Simple OR all Advanced models).Īdvanced cooling coil models can be served only by a Chilled Water Loop. The Advanced model also provides more detailed coil specification methods so that coils may be better sized or selected from manufacturer data for specific HVAC system configurations. The Advanced model provides the necessary modeling detail to support explicit waterside modeling contained in Chilled Water Loop configurations. This includes modeling the coil in for dry (sensible), wet (latent), and partial drywet conditions. Dream xxi p softwareĪgain, if for example, the cooling capacity is too low, the user might input a higher air mass flow.Īn Advanced model more explicitly models both airside and waterside heat transfer providing a more detailed and accurate calculation of coil heat transfer and corresponding airsidewaterside properties. If you continue to use this site we will assume that you are happy with it. We have pre-built DLLs for psychrometrics, NEC electrical, DX cooling, heat pumps, water coils, steam coils, valves, piping, lighting, and other products.
We develop stand-alone selection programs or integrate with our cloud eRep CPQ for a fully-integrated solution.
It can also be used as a guide to unit specifications multizone systems.
Alternatively, a different pricing criteria can be specified by the manufacturer and stored in the module.
0 kommentar(er)
