The Daikin Module for the Virtual Environment is capable of sizing and simulation of Daikin’s VRV equipment. VRV (Variable Refrigerant Volume) systems are a frequently used renewable air source solution for heating and cooling. VRV is a modular system with very high efficiencies obtainable with considered application.
Pipe Heat Pump Systems
Heat pump systems are able to either cool or heat (but not simultaneously) and are generally used in open plan areas or buildings where simultaneous heating and cooling demands do not exist.
Pipe Heat Recovery Systems
Heat recovery systems can heat and cool simultaneously. These highly efficient systems recover heat (by cooling a space) and moving this energy to area(s) that require heating, for example. A typical comms room generates heat for 24 hours a day can provide the system with effectively a “free” heat source, which can then be used to heat other spaces or provide heat into water to provide DHW, LTHW for air handling units, underfloor heating or door air curtains.
By using this module it is possible to weigh up the advantages of using VRV against other types of heating and cooling technology. With intelligent design applied, this module will enable higher efficiencies than the standard published efficiencies for use within the Part L compliance module of the Virtual Environment.
This module will select a system capable of meeting the needs of the simulated model which includes condensers, fan coils & branch selector boxes (for simultaneous Heat Recovery systems) Accessories like pipework joints, zone controls, centralised control devices or 3rd party controllers are not included, however the effect of controls can be simulated by using profiles to effect setpoints, time schedules, setback temperatures.
The simulation process takes into account the following additional variables:
· Heat Recovery efficiencies
· Pipe length corrections
· Height differences between condenser & fan coils
· Oil return
· Defrost of the outdoor coil
· The power input of condenser, fan coil and auxiliary power consuming components
In order for the module to be used within VE, training on its use should be undertaken by the relevant users in order to assure an adequate level of understanding of the design of VRV systems. On completion of this training the plugin will be provided for use by the trainees. This training can be provided by Daikin as an IES Authorised Training Partner for the VRV module for the Virtual Environment.
This simulation has been specifically written for Daikin VRV systems and is not suitable as a selection or simulation tool for any other similar system. Features like continuous heating during defrost, heat recovery efficiency, pipe length correction (amongst others) are either unique to Daikin or can differ in operational effectiveness which can create significant changes in efficiency for each system.
This manual assumes that the user is already familiar with the Virtual Environment and has a working knowledge of the ApacheSim module including the Building Template Manager, Apache Systems, Apache Profile Manager and has the ability to assign systems and profiles to the model.
