PSI - Issue 54

E.S. Gonçalves et al. / Procedia Structural Integrity 54 (2024) 91–98 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

96 6

Table 8 - Boundary conditions for each simulation

^ŝŵƵůĂƚŝŽŶ ϭ :ĂŶƵĂƌLJ ( ∞ = −5° ) ϲϰ͘ ϲ

^ŝŵƵůĂƚŝŽŶ Ϯ :ƵůLJ ( ∞ = 35° ) ϭϲ͘ ϯ Ͳϱϱ͘ ϱ

^ŝŵƵůĂƚŝŽŶ ϯ ^ĞƉƚĞŵďĞƌ ( ∞ = 25° ) ϲϱ͘ ϳ ͲϯϬ͘ ϭ

hŶĞ ůĂƚĞƌĂů ƐƵƌĨĂĐĞ ŽĨ ƚŚĞ ĐŽůƵŵŶ ;ŐůŽďĂů ƌĂĚ͘ Ăƚ ϵϬΣͿ [ / 2 ] dŚƌĞĞ ůĂƚĞƌĂů ƐƵƌĨĂĐĞƐ ŽĨ ƚŚĞ ĐŽůƵŵŶ ;ĚŝĨĨƵƐĞ ƌĂĚ͘ Ăƚ ϵϬΣͿ [ / 2 ] Ͳϴ͘ Ϭ ŽůƵŵŶ ĂŶĚ ĨůĂŶŐĞ ƚŽƉ ƐƵƌĨĂĐĞ ;ŐůŽďĂů ƌĂĚ͘ Ăƚ ϬΣͿ [ / 2 ] ϯϭ͘ ϭ ŽŶĐƌĞƚĞ ƐƵƌĨĂĐĞ ;ŐůŽďĂů ƌĂĚ͘ Ăƚ ϬΣͿ [ / 2 ] ϰϵ͘ ϳ ^ŝĚĞǁĂůŬ ƐƵƌĨĂĐĞ ;ŐůŽďĂů ƌĂĚ͘ Ăƚ ϬΣͿ [ / 2 ] Ͳϱ͘ ϭ >ĂƚĞƌĂů ƐƵƌĨĂĐĞƐ ŽĨ ƚŚĞ ĐŽůƵŵŶ [ / 2 ] Ϯ͘ ϲ &ůĂŶŐĞ ƐƵƌĨĂĐĞ [ / 2 ] ϰ͘ ϰ dŽƉ ƐƵƌĨĂĐĞ ŽĨ ƚŚĞ ĐŽůƵŵŶ [ / 2 ] ϱ͘ Ϭ ŽŶĐƌĞƚĞ ƐƵƌĨĂĐĞ [ / 2 ] ϰ͘ Ϭ ^ŝĚĞǁĂůŬ ƐƵƌĨĂĐĞ [ / 2 ] Ϯ͘ ϳ dĞŵƉĞƌĂƚƵƌĞ Ăƚ Ă ĚĞƉƚŚ ŽĨ ƚŚƌĞĞ ŵĞƚĞƌƐ [° ] ϭϱ͘ Ϭ dĞŵƉĞƌĂƚƵƌĞ ŽŶ ƚŚĞ ůĂƚĞƌĂůƐ ŽĨ ƚŚĞ ƐŽŝů ĐŽŶƚƌŽů ǀŽůƵŵĞ [° ] ϲ͘ Ϭ WŽǁĞƌ ĚŝƐƐŝƉĂƚĞĚ ďLJ ŽŶĞ ďĂƚƚĞƌLJΎ [ ] Ϭ͘ ϱ ŽŶǀĞĐƚŝŽŶ ZĂĚŝĂƚŝŽŶ

ϭϬϰ͘ ϳ ϮϬϱ͘ ϴ ϱϭ͘ ϰ

ϴϯ͘ ϯ ϭϲϴ͘ ϵ ϰϵ͘ ϵ

Ϯ͘ Ϯ ϰ͘ ϭ ϰ͘ ϲ ϯ͘ ϳ Ϯ͘ ϱ

Ϯ͘ ϯ ϰ͘ Ϯ ϰ͘ ϳ ϯ͘ ϳ Ϯ͘ ϱ

ϭϲ͘ Ϭ Ϯϰ͘ Ϭ

ϭϵ͘ Ϭ Ϯϭ͘ Ϭ

Ϭ͘ ϱ

Ϭ͘ ϱ

* For the calculation of the power dissipated, the Ultracell battery model UCG75-12 was considered, with an internal resistance of 6.6 m Ω . Admitting an operating voltage equal to 12V and an electric current requested equal to 8.75 A, a power dissipation of 0.5W per battery was obtained. 3. Results and Discussion As already mentioned, the thermal conditions inside the battery storage compartment were analyzed in the months of January, July, and September, but due to space limitations only the heat transfer simulation images for July will be presented in this section. Still, the results for the three months are compared in the conclusions. 3.1. Temperature variation Figure 2 shows the temperature variation inside the foundation on a typical day in July, where the maximum global solar irradiance is at 0°. In this analysis an ambient temperature of 35°C was considered.

ĂͿ

ďͿ

Fig. 2 - Temperature variation inside the foundation: a) steady state analysis; b) transient analysis after temperature stabilization (time=60min)