Numerical optimization on thermal performance characteristics of interior walls based on air-conditioning intermittent running

Thermal performance optimization of building floors under air-conditioning intermittent operation by numerical simulation

“…However, due to the fact that adding the air space ceiling can increase the thermal resistance of floors, the negative impact was gained under Cases 2 and 4. These rules are in line with Meng et al (2018c).…”

“…In the other research under the same thermal conditions (Meng et al, 2018a, 2018c), the optimization can lead to reducing the cooling load by 7%–19% and 12.7%–26.1% for the exterior and interior walls, respectively. Compared to the reduced daily cooling load of 47.00%–53.27% through the floor optimization, the floor is affirmed as the most vulnerable spot of the room heat preservation.…”

“…However, thermal performance indexes of building interior envelopes are not essential and compulsory provisions in the current energy efficiency design standards of China (MOHURD, JGJ 134-2010, 2010; MOHURD, JGJ268-2010, 2010; MOHURD, JGJ50198-2015, 2015), so interior envelopes may lead to the much heat loss, which would form the large cooling load. For the thermal performance optimization of interior envelops, Meng et al (2018a) built six typically employed interior walls to compare their thermal performance characteristics under air-conditioning intermittent operation. Their numerical results showed that air-conditioning operation behavior in the adjacent room had an observable influence on temperature response rates and heat flow values in inner surfaces.…”

“…From the research of Meng et al (2018a), it can be concluded that the interior envelop can cause much heat loss under air-conditioning intermittent operation. For the thermal performance analysis on building non-transparent envelops under air-conditioning intermittent operation, Table 1 provides a summary.…”

Composition of cooling load formed by non-transparent envelopes of a common office building under air-conditioning intermittent operation

“…Table 1. A summary on the thermal performance analysis on non-transparent envelopes under air-conditioning intermittent operation (Barrios et al, 2012;Hou et al, 2018;Ibrahim et al, 2012;Li et al, 2018;Meng et al, 2018aMeng et al, , 2018bMeng et al, , 2018cRuan et al, 2015;Yan et al, 2015;Yuan et al, 2017;Zhang et al, 2017a) Aimed at this, a common office building was chosen and inner surface heat flows in the studied room were measured under the intermittent different groups of airconditioning in the adjacent rooms. Three typical rooms with the different areas were considered with one and two exterior walls, and combined with envelop areas and heat flow values, the heat transfer capacity through the different envelopes could be gained to analyze the composition characteristic on cooling load formed by non-transparent envelopes of a common office building under air-conditioning intermittent operation.…”