Baterries for different applications require different voltage. What conditions determine the voltage for given application and what voltages are specific for concrete battery technologies?

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

The main topic of this paper was to count the price for 1 kWh of electric energy in a different battery systems. The prices were determined from the datasheets of the manufacturers. The stationary lead acid batteries and LiFeYPO4 batteries are recommended because of their great properties.

What are the requirements for stationary battery storage? What technologies can we use and what we can expect from them?

The paper presents an analysis of PV system usage without a battery storage to cover electricity consumption for single family house with 4 persons and heat pump as a heat source for heating and preparation of domestic hot water. The result of the analysis shows the importance of using a sufficiently short time step of load profiles for correct assessment of solar fraction of PV system. Simplifying chart for fast estimation of solar fraction in a given application (heat pump, user energy) has been developed.

The paper deals with simulation analysis of solar system for domestic hot water preparation for apartment building. The analysis shows the influence of climatic conditions on solar system gains. The aim is to verify whether the level of solar gains can be guaranteed in the Czech Republic's climatic conditions. In discussions over the efforts to guarantee the benefits of a designed and installed solar system, another question arises as to how the total solar radiation changes year-on-year and whether its annual fluctuations can be simply passed on to the solar system's profit.

The authors answer the question how to choose a heat source for a family house built with respect to the current thermal technical requirements. An example is new building of a two-storey family house approximately 20 km south of Brno with a residential part of the house with a square plan of 11 × 11 meters. The evaluation results are compared according to five different criteria.

Photovoltaics has been known for decades, and there have been many discussions about whether and where a power plant with fixed panels or panels with automatic winding to the sun is more economical. While falling panel prices and the latest technical breakthroughs have been progressively sending solar trackers to history, let us try to offer one more idea to the photovoltaic team, who continue to consider trackers as perspective.

The second part of the article on renewable energy sources (RES) in context of the energy balance focuses on the transformation process and final consumption and follows the first part, where RES were introduced as primary energy sources.

The article focuses on the introduction of renewable energy sources (RES) in the energy balance as primary energy sources, during the transformation process and their use for final consumption. The first part is devoted to basic terminology and primary energy sources, the second part focuses on the transformation process and final consumption.

The article describes currently used types of lithium based accumulators. Basic principles, parameters, advantages and disadvantages are listed in the article.

The paper presents results of a study on potential reduction of CO₂ emissions of the Czech national building stock until 2075. The calculations were based on datasets provided by Chance for Buildings that modeled five different scenarios of energy savings in the Czech building stock that varied by the depth of the energy retrofitting measures and by the pace of their application. The results were compared to the carbon budget that was set in line with the objectives of the Paris agreement.

Houses equipped with photovoltaics are more and more common. What are the conditions for sale and purchase of a house with solar powerplant?

The paper deals with the problem of optimal sizing of battery-powered hybrid power systems for HV extraction installations, where electricity consumption diagrams are available and it can be assumed that the nature of the operation will not change when photovoltaic technology is installed with battery storage. This is a difficult task, as each installation is specific to its nature of consumption, energy prices, location and investor requirements. The article outlines how to solve this problem by using the numerical optimization methods implemented in MicrOpt Design, the use of which is shown in a specific example.

The current era is favorable for the expansion of renewable energy sources and their integration into the energy economy of buildings for residential or commercial use. According to the long-term statistics, buildings consume about 40 % of all energy produced. At the same time, the buildings together with the industry provide a huge potential for the installation of renewable energy sources. The article presents advantages and disadvantages of particular types of the most commonly used photovoltaic systems integrated in buildings. It describes the ways to maximize the use of the installed renewable sources, the assessment of the rate of return of the particular types of photovoltaic systems, not counting the subsidy support, and evaluation of the installation complexity (both financial and technical).

Reports on drought in the Czech Republic, as presented in the media and in news releases of government institutions, are overstated. Natural course of climate is not accepted and data on groundwater are distorted. Nobody but ourselves should be blamed for some of the effects of “drought”, which result from a misconduct in drilling and casing installation in wells and boreholes for heat pumps as well as from anthropogenic interventions in landscape. landscape.