A simplified thermal response model

Abstract

The observed dynamic thermal response of intermittently occupied buildings can usually be described by one or two time constants. This suggests that much of the complexity in detailed computer thermal response models may not always be necessary. Simplified thermal response models may be adequate for many purposes, and ought to have cost advantages, both in setting up and run time. The paper describes the basis of a simplified microcomputer model of building thermal response. Model predictions of internal temperature variation in a working school are shown to agree well with observations. The model is intended for professional use and user interface is being developed in consultation with an architectural practice.

An improved lumped parameter method for building thermal modelling

“… Lumped parameter construction element models from which whole room models may be constructed [1, 2, 3]  Lumped parameter whole room models [4,5,6,7,8] Though the differences between the two approaches are rather subtle (since models of individual constructions elements are almost always used as a basis for grouping or aggregating into whole room models), the treatment of individual elements usually provide greater detail in modelling information such as individual surface temperatures which can be important when dealing with radiant sources, etc.…”

“…Crabb et al [4], Tindale [5] and others [6,7,8] have applied the lumped parameter approach to the formulation of low-order whole room models by casting the capacitance parameter over the higher capacity elements of a room (external walls, solid floors, etc) and using algebraic heat balances for the lower capacity room elements (demountable partitions, etc). Tindale [5] attempted this using a second-order room model but found that it provided unacceptable results for rooms with very high thermal capacity (i.e.…”

Human behaviorchanging based on the simulation of the temperature control of a house

“…Based on the measured and/or estimated information, and based on the information received by the web application, it's expected that the occupant to actuate on the control system of the heating system so that the energy consumption to decrease in conditions of maintaining in acceptable limits the thermal comfort. Of course, exists a large variety of software [2] that permits the obtaining of the thermal model of the household. In the most cases however, the user has to know more data regarding the household features (construction materials, different parameters etc.…”

“…Sometimes, a simple model can also offer good results. In this paper it is used a simplified zone thermal model which was originally introduced in [2]. The model has two dynamic temperature nodes roughly representing the air and a lumped structure node.…”

“…Usually, the thermal model is created based on the characteristics of the building [2]. This model can be used for on-line simulations.…”