Thermal parameter identification of simplified building model with electric appliance

Abstract

In order to reduce heat energy demand in residential building, thermal insulation and indoor air tightness become more important. However, in a well-insulated environment, internal heat gain caused by solar radiation, metabolism and losses of home electric appliance (i.e. refrigerator, lamp, television, etc.) can be dominant to home global energy management. To quantify and to modelize the heat gain due to home appliances, we begin experimental measurements in a wellinsulated room. The first step in this work is the identification of the room. In this paper we suggest a 1R1C lumped parameter circuit which presents a building thermal model using thermalelectric analogy. Then, we identify the circuit components (the global thermal resistor and the global thermal capacitor) from the heat balance equation and experimental results. Based on the model and the obtained parameters, we simulate the indoor temperature of the model using Matlab/Simulink. To check its accuracy we compare the measured data and simulation results and calculate their error ratio.

A hybrid model approach for forecasting future residential electricity consumption

“…The lowest order network, such as 1R-1C, is limited to a well-insulated room with fewer heat sources [29]. The higher order network, such as 4R-3C, does not provide significant improvement on temperature response prediction [30].…”

A review on modeling and simulation of building energy systems

“…Park et al [80] developed a 1R1C lumped parameter network to model heat gain due to home appliances in a well-insulated room. The test room was equipped with a temperature acquisition device and a number of thermocouples, two in the outer side of the room to measure outside air and wall temperature and sixteen inside the room to estimate the indoor temperature.…”

Modeling of a Building System and its Parameter Identification

“…Two thermocouples are positioned beyond the electric heater for measuring T ap (t) during the test. Eighteen thermocouples are positioned for measuring T i (t) and T e (t) and the details of the position of these thermocouples are described in [3]. Each quantity is measured each 60 [s] and stored into a host computer.…”

“…Since reinforcing thermal insulation prevents loosing heat through the building envelopes, the auxiliary heat gains, such as solar radiation, occupant's metabolic heat, and heat dissipation of electrical equipment and appliances, and light can influence dominantly to the building's indoor thermal condition. It is related to the building energy consumption and the indoor thermal comfort of occupants [3].…”