Prediction of the heat gain of external walls: An innovative approach for full-featured excitations based on the simplified method of Mackey-and-Wright

Simple thermal evaluation of building envelopes containing phase change materials using a modified admittance method

“…Methods that estimate the thermal load through a building envelope include (i) the response factor, (ii) the total equivalent temperature difference/time-averaging (TETD-TA), (iii) the transfer function (TF), (iv) the cooling load temperature difference (CLTD), (v) the heat balance (HB), (vi) the radiant time series (RTS), and (vii) the admittance methods [21,23].…”

“…Note that T ET D(t) can also be written in terms of f AM [31]. Ruivo Overall, the TETD and admittance methods have been successfully applied to complex wall constructions subjected to realistic weather conditions [22,23]. However, previous studies were considering construction materials with constant thermal properties.…”

“…Instead of finite element methods, HEED [19] employs the admittance method [20] and the total equivalent temperature difference/time-averaging (TETD-TA) method [21] to assess the thermal load through building walls. However, the admittance and TETD-TA methods were derived for wall materials with constant thermal properties subjected to sinusoidal sol-air temperatures [22,23]. Thus, they cannot be used for PCM-composite walls, in their present form.…”

“…et al[23] compared T ET D(t) predicted numerically and analytically for several multilayer wall constructions subjected to a constant indoor temperature and to a realistic (i.e., non-sinusoidal) sol-air temperature. The authors illustrated that T ET D(t) calculated using Equation(8) agreedfairly well with numerical predictions for wall constructions with small thermal mass but agreed poorly for walls with large thermal mass.…”

Experimental Evaluation of Shape Factor of Axis Symmetric Sunken Structures

“…Shape fators of three different desgine and its optimization using RSM and validation with P test for the steady state heat transfer between swimming pool water and surrounding ground has been reported by Somwanshi et al [16]. Utilistion of shape factor of device/ equipement for the analysis of heat transfer from surface to ambient or ambient to surface have been reported by various researchers [17][18][19][20][21][22]. Evaluation of heat transfer from fully sunken structure to the surrounding ground or surrounding ground to sunken structure is a comples phenomena.…”