1. Comparative analysis of insulations located horizontal on the floor and/or vertical beside the foundation both winter and summer conditions
Péter MEDGYASSZAY
Budapest University of Technology and Economics - Faculty of Civil Engineering
Department of Construction Materials and Technologies -

2. Objectives Floor on the ground Background: Climate Change …
Optimization of envelope
Reduction of COeq2 emission
Reduction of primer energy consumption
mitigation
Floor on the ground
with vertical and/or horizontal insulation
Background:
Climate Change
Provide the appropriate indoor climate
Cooling
Passive cooling by thermal mass …
adaptation

3. Methods 1: Energy calculation according to the Hungarian standards
(detailed method)
to calculate the delivered energy and the primer energy consumption.
2: Dynamic building simulation
to calculate the net energy need and the „number of uncomfortable hours” (PMV>1,08).
3: Heat-transfer simulation
(2D, steady-state and transient)
to calculate the lineal thermal transmittance and to understand the effect of different seasons.
4: On site measurement
to validate the results.

4. Results
1: According to the steady-state heat transfer simulation the horizontal insulation was cca. 30% more effective to reduce the heat losses, than the vertical one.
2: According to the dynamic building simulation the vertical insulation was much more effective to provide the appropriate indoor climate in summer period than the horizontal one.
3: According to the on site measures the energy consumption were both case lower than the worse case energy calculation.
4: The transient heat transfer might show that the vertical insulation do not cat the internal space from the ground which can activate a huge thermal mass to balance the indoor temperature in summer period.