Miloš Kalousek

Electricity Storage in Passive House in Central Europe Region

Paper deals with theoretical electricity storage possibilities. Theoretic electricity storage system is integrated into system of small photovoltaic power plant (32 m²). Panels are located in the roof of the passive house. Paper shows time distribution of energy flows (PV produce, house energy consumption, storage systém energy coverage etc.) during the days and during the years. Paper shows photovoltaic panel geometry influence on fluctuating of electricity produce and whole this system during the year. Paper closes the discussion about suitability of such electricity storage system for Central Europe region.

Comparing Methods for Calculating Thermal Stability of Rooms

The main idea of the article compares methods for the calculation of thermal stability of rooms in wintertime. The article is focused on comparison of an analytical and a numerical method on the sample room and specification of their differences. The main advantage of the analytical method is calculation in arbitrary time from a steady state without calculation of some previous steps. However, the method doesn’t allow a great variability of composition of constructions. The numerical methods depend on previous steps of the calculation, therefore they require many calculations with little time steps. It enables to define of some complex compositions of constructions and complex modelling of an internal state in the room and its changes in time. The determination of difference rate for different methods will verify their suitability for calculation.

Exploitability of Renewable Resources in Administrative Buildings

The evaluation of energy flow measurements in two very special buildings under the name of Open Gardens, located in Brno, resulted in confirming that the resources of renewable energy in the Czech Republic can be sufficiently utilized. This energy is derived from photovoltaic elements and earth heat pumps and, additionally, it gets also accumulated in building structures. The energy from renewable resources is utilized for heating, cooling, warm water preparation, for raising air temperature, and it also partially covers the demand for electricity in the building. During the summer period, if the solar gains are considerable, the buildings need being cooled. This is ensured by an earth heat pump enabling the storage of waste heat in deep earth bore holes, offering the advantage of recuperating the heat for heating the rooms during the winter months. At the same time all electricity produced in the building gets utilized, covering roughly 1/3 of the consumption. A plan of comprehensive measurements aiming at the optimization of the most demanding electric appliances has been conceived for this compound of buildings, in order to ensure the best possible utilization of the produced electricity.

Summer Thermal Stability of a Passive House in Moravany - The Czech Republic and Thermal Storage Mass

The article describes the summer thermal stability of a semidetached passive house in Moravany - Czech Republic. Long-term measurement was carried out on the uninhabited house. The house is divided into two symmetrically identical residential units. Indoor air temperature differences of these symmetrically identical rooms are compared. Comparative numerical simulation was also carried out.

Effect of Ventilation in Protected Escape Ways upon the Thermal Properties of these Spaces

Protected escape routes enable the rescuing of persons to the outside of a building on fire. They are characterized, in particular, by strict requirements relating to the aeration of such spaces. However, the fulfilling of these limits may impact the monitored thermal characteristics of the respective internal areas. The outlined dilemma will be illustrated by way of an example of a protected escape route aerated by positive-pressure ventilation.

Comparison of Modelled Distribution of Thermal Fields at Seasonal Ground Storage Segments

In order to reduce the energy demand leads to the creation of alternative ways, how to store energy for extended time period and cover starting part of winter term with heating. One possibly way is to store solar energy in the soil under and near the building. This article focuses on comparing the distribution and thermal unsteady field in the seasonal distribution elements of the ground storage located under the building. The comparison will occurred change of accumulated material properties and optimal distance distribution pipes or elements, so as to create the most efficient storing systems.

Quasistationary and Dynamic Simulation of Summer Overheating of Passive Timber House

This paper presents simulation results of summer overheating of passive house in Dubňany - Czech Republic. The simulation was performed using the quasistationary method in the program SIMULACE and the dynamic method in the program BSim. Outputs from both programs are then compared. Since the simulation was performed on three structural variants, two timber houses and one brick house, the article also deals with different results from program BSim between these three structual systems.

Linear Thermal Transmittance of Holding Unit of Balcony Slab to External Wall

The balcony is one of the main reasons of the increased heat loss. If the balcony construction is performed of a metal back slab it would be hardly possible to avoid the formation of a powerful thermal bridge that will go along the whole balcony length. This problem could be solved by the thermal isolation of the wall which is the balcony support or by carrying out an integral thermal isolation of both the wall and the balcony. In the article the estimation and comparison of the six possible variants of the construction thermal isolation has been carried out. With the help of the two-dimensional thermal field the linear thermal transmittance and the temperature in distinguished points have been found.

Comparison of the Possibility of Using the Accumulation Underground Storage under Buildings

The article focuses on a comparison of storage of heat energy to the underground soil tank located under the building or in the immediate vicinity. Effective utilization of surplus energy from solar radiation that would be stored in a tank under the buildings and subsequently used for an extended period of time is one of the factors that significantly related to the reduction of environmental burden, and elimination of non-renewable energy sources, especially fossil fuels.