Appliance

appliance - General residential appliance model

Synopsis
module residential; object appliance { // inherited from residential_enduse durations "duration-array"; transitions "transition-array|transition-matrix"; impedances "impedance-array"; currents "current-array"; powers "power-array"; heatgains "heatgain-array''"; }

Remarks
The appliance model implement a general purpose state-based residential appliance model. The model implements a N state model where N is the length of the durations array. As the appliance changes states, the corresponding values from the impedances, currents, powers, and heatgains are copied to the residential_enduse properties.

The transitions matrix specified the probability of a state change during the time interval of the state specified in the durations array. If the transitions matrix is a 1xN matrix, the state transitions are linear from state 0 to state N-1 and back to state 0 during the time interval. If the transitions matrix is a NxN matrix, the state transitions are from any given state to any other state with the corresponding probability during the time interval. A transition value of 0 is used to indicate that no transition will occur in the interval.

durations
A 1xN array of doubles specifying the time duration of each state. The size of the durations array determines the number of states.

transitions
A 1xN or NxN matrix of doubles specifying the transition probability to the next state (for 1xN) or any state (for NxN) during the time interval. The value of N is determined by the size of the durations array.

impedances
A 1xN array of complex values specifying the impedance of the appliance when in each state. The value of N is determined by the size of the durations array.

current
A 1xN array of complex values specifying the currents of the appliance when in each state. The value of N is determined by the size of the durations array.

powers
A 1xN array of complex values specifying the powers of the appliance when in each state. The value of N is determined by the size of the durations array.

heatgains
A 1xN array of doubles specifying the heat gains fraction to the interior air of the appliance when in each state. The value of N is determined by the size of the durations array.

Example
The following example illustrates a simple linear-state appliance model:

module residential; object appliance { //          daily,  pump,   agitate,  pump,   spin durations  "86400   60      300       60      300"; transitions "0.25   0.0     0.0       0.0     0.0"; powers     "0       1+0.1j  1+0.2j    1+0.1j  2+0.2j"; };

The state machine starts roughly once daily with a 1/4 probability. The first state lasts 1 minute with a 1kW+0.1kVAR load. The second state lasts 5 minutes with a 1kW+0.2kVAR load. The third state lasts 1 minute with a 1kW+0.1kVAR load. The last state last 5 minutes with 2kW+0.2kVAR load.

Version
The general appliance model was introduced in.