Research on thermal performance of external thermal insulation composite concrete wall block

Abstract

For the defects of temperature control performance and thermal property of existing concrete building walls, a new composite concrete wall block is proposed, and the thermal property of the block is calculated and analyzed. The transverse hole of designed H-shaped concrete block can be embedded with thermal insulation materials, and the vertical ribs are added to the traditional brick wall, which effectively increases the stability and thermal performance of the wall. The selected PCM concrete has better functions of heat storage and temperature regulation. The thermal performance test results show that the thermal insulation performance of H-shaped wall block is the best, which is due to the H-shaped wall block can effectively block the transverse thermal bridge effect of the wall, and the heat flow increases remarkably. The results of practical environmental monitoring on H-shaped concrete block show that there is a large temperature difference between the external wall and the internal wall, and the wall has better thermal insulation performance.

Desenvolvimento de novo modelo para bloco de concreto estrutural com foco no comportamento térmico

“…A esse respeito, Zhang et al (2018) propuseram dois modelos de bloco utilizando concreto PCM: um deles em forma de H e o outro com aparência quadrada. O concreto PCM apresentou uma melhor regulação de temperatura, o que contribuiu para o isolamento térmico e a parede em H demonstrou melhor desempenho em relação ao outro modelo, podendo comportar outros materiais isolantes térmicos.…”

Simulation of historical buildings and plant system. La Montagnola primary school in Florence

“…For intermittently heated spaces and for no heating conditions, the better position of insulation material for energy consumption reduction and indoor thermal comfort is on the interior wall surface [11]. It has been widely demonstrated that plant and regulation system retrofitting interventions are preferable because they are effective and with much lower overall costs than any intervention on the building envelope, especially if the building belongs to historical heritage [11][12]. Other studies show that the use of PMV as a parameter for the control strategy of a plant system leads to a considerable energy saving in comparison with the use of a fixed set-point range of indoor air temperature [13].…”