Thermal building simulation programs, such as EnergyPlus, approximate solutions of a differential algebraic system of equations. While the theoretical solution is usually continuously differentiable in the building design parameters, the approximate solutions may not even be continuous, due to adaptive variations in solver iterations and the use of adaptive integration meshes. Hence, when a smo...

In this work, the test case 1 of german standard VDI 2078 is used to compare softwares OpenModelica and EnergyPlus. The mentioned provides calculation methods thermal load temperature cases for validation zones’ models. This case’s behavior was evaluated in both softwares, keeping reference values provided by standard. Pearson’s correlation coefficient calculated between obtained EnergyPlus zon...

Despite inter-building longwave radiative exchanges playing an important role in determining building energy and environmental performance, simulation tools (e.g. EnergyPlus) simplify this by assuming the surface temperature of surrounding buildings to be equal air temperature, therefore cause bias. Here we propose a ‘spin-up’ approach update external using either or isolated temperatures. Neig...

Owing to the current challenges in energy and environmental crises, improving buildings, as one of biggest concerns contributors these issues, is increasingly receiving attention from world. Due a variety choices situations for it important review building performance optimization studies find proper solution. In this paper, are reviewed by analyzing all different key parameters involved proces...

The latest attempts in determining the spatiotemporal patterns of energy use building sector have led to development a new set tools referred as “urban models” (UBEMs). Due high level complexity, computation cost UBEMs risks becoming impractically large. As substitution for complex models, this study, using simplified steady-state method calculating performance buildings, more computationally e...

A direct expansion (DX) HVAC system is an efficient way to supply fresh and dehumidified air to a built environment. To improve the efficiency of a conventional DX system in hot and humid regions, fresh air dehumidification and conditioning systems with energy recovery measures are the key equipment to reach such a goal. To achieve this goal an integrated system is proposed. The integrated syst...