Refrigerator
[Residential loads (residential)]

Detailed Description

The refrigerator model is based on performance profile that can specified by a tape and using a method developed by Ross T.

Guttromson

Original ODE:

$ \frac{C_f}{UA_r + UA_f} \frac{dT_{air}}{dt} + T_{air} = T_{out} + \frac{Q_r}{UA_r} $

where

$ T_{air} $ is the temperature of the water

$ T_{out} $ is the ambient temperature around the refrigerator

$ UA_r $ is the UA of the refrigerator itself

$ UA_f $ is the UA of the food-air

$ C_f $ is the heat capacity of the food

$ Q_r $ is the heat rate from the cooling system

General form:

$ T_t = (T_o - C_2)e^{\frac{-t}{C_1}} + C_2 $

where

t is the elapsed time

$ T_o $ is the initial temperature

$ T_t$ is the temperature at time t

$ C_1 = \frac{C_f}{UA_r + UA_f} $

$ C_2 = T_out + \frac{Q_r}{UA_f} $

Time solution

$ t = -ln\frac{T_t - C_2}{T_o - C_2}*C_1 $


Classes

class  refrigerator

Functions

int refrigerator::create ()
EXPORT int create_refrigerator (OBJECT **obj, OBJECT *parent)
int refrigerator::init (OBJECT *parent)
EXPORT int init_refrigerator (OBJECT *obj)
 refrigerator::refrigerator (MODULE *module)
TIMESTAMP refrigerator::sync (TIMESTAMP t0, TIMESTAMP t1)
EXPORT TIMESTAMP sync_refrigerator (OBJECT *obj, TIMESTAMP t0)
 refrigerator::~refrigerator ()

Variables

static refrigerator * refrigerator::defaults = NULL
static CLASS * refrigerator::oclass = NULL

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