{"id":3989,"date":"2025-11-21T13:10:06","date_gmt":"2025-11-21T12:10:06","guid":{"rendered":"https:\/\/cieplowent.pl\/in-issue-11-2025\/"},"modified":"2026-01-16T13:34:05","modified_gmt":"2026-01-16T12:34:05","slug":"in-issue-11-2025","status":"publish","type":"post","link":"https:\/\/cieplowent.pl\/en\/in-issue-11-2025\/","title":{"rendered":"In issue 11\/2025"},"content":{"rendered":"
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\u2794 KAMIL SKWIRUT:<\/strong>\n Municipal Thermal Power Company in Rzeszow - outline of history<\/a>\n <\/p>\n\n

On October 24, 2025, a ceremony was held to mark the 60th anniversary of MPEC-Rzeszow, which brought together representatives of state and local authorities, rectors of universities, departments and institutions operating in the city, as well as friendly organizations and heating companies from all over Poland. During the ceremony, Subcarpathian Governor Ms. Teresa Kubas-Hul handed over state medals awarded by the President of the Republic of Poland to deserving employees of MPEC- -Rzeszow. 60 years of service to the residents of the city of Rzeszow were also congratulated by the Mayor of the city, Mr. Konrad Fijo\u0142ek. President of the Company's Management Board Mr. Dariusz Kotowicz thanked for their daily, extremely important work all MPEC-Rzeszow employees: current and retired, who built the strength and reputation of the Rzesz\u00f3w heating industry. He also directed words of thanks to all system heat consumers, for whom MPEC-Rzeszow operates, develops and improves the quality of its services. On the occasion of such a noble jubilee, it is worth giving a brief history of the establishment and activities of our company and outline its plans for the future. Beginnings of the Rzeszow district heating sector The year 1957, or more precisely December 22 of that year, should be considered as the beginning of the district heating sector in Rzeszow, i.e. aimed at the collective supply of heat to multi-family residential buildings. On that day, a high-pressure boiler of the company's combined heat and power plant was started up for the first time on the premises of the Rzeszow Communication Equipment Plant. The event was preceded by a three-day trial run. A number of auxiliary facilities were also put into operation for the first time: a water softening plant, water pumps, water and steam pipelines and a coal conveyor belt. It was a very important moment not only for the entire WSK plant, but especially in the perspective of several years for the city of Rzeszow. [Open Access] <\/div>\n \n
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\u2794 MACIEJ BESLER:<\/strong>\n Effects of deep thermomodernization of a single-family residential building - a case study<\/a>\n <\/p>\n\n \n

\n DOI: 10.15199\/9.2025.11.1<\/span>\n \n
\n Zobacz streszczenie<\/a>\n
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S\u0142owa kluczowe:<\/strong> thermomodernization, energy audit, energy savings, heat loss<\/p>\n

Streszczenie:<\/strong>
The article presents the effects of a deep thermo-modernization of a single-family building, which consisted of modernizing the heat source, improving the control of the operation of the heating system and reducing the amount of heat penetrating into the environment during the winter season by insulating the external envelope and replacing windows and doors. Additional measures included the installation of a PV system. The work was carried out in stages. The results obtained after the various stages are shown in the charts. An energy audit was also prepared for the initial and final states. The results indicate that the building has achieved a significant improvement in the reduction of energy consumed and has achieved a B-class in the EPBD classification from the initial G-class. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n

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\u2794 MAREK BADURA:<\/strong>\n Use of gas-hydrogen mixtures in domestic gas installations<\/a>\n <\/p>\n\n \n

\n DOI: 10.15199\/9.2025.11.2<\/span>\n \n
\n Zobacz streszczenie<\/a>\n
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S\u0142owa kluczowe:<\/strong> Hydrogen fuels, alternative, decarbonization, gas appliances<\/p>\n

Streszczenie:<\/strong>
Introduction: The problems of environmental pollution, climate change and ensuring energy security have generated interest in recent years in producing renewable hydrogen and using it in various industries. Hydrogen is considered not only as an energy carrier and storage, but also as an alternative fuel, the combustion of which in a mixture with natural gas can reduce carbon dioxide emissions. Purpose: The purpose of this article is to present the current state of knowledge regarding the properties of hydrogen and hydrogen-gas mixtures and the hydrogen concentration levels that ensure the safe operation of gas plant components. Methods: The article includes a review of the literature in the subject of the effects of the addition of hydrogen to natural gas on the tightness of pipes, the operation of gas appliances used in households, the functioning of gas meters and pressure regulators. Conclusions and reference to practical applications: Adding hydrogen to natural gas reduces the quality parameters of this fuel. Meeting the criteria related to caloricity is possible for hydrogen concentrations in the mixture reaching more than 20%, but is highly dependent on the gas group and its composition. An analysis of available literature studies indicates that hydrogen content up to the level of 15% should not cause technical difficulties or deterioration in the safety of operation of domestic gas installations and appliances. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n

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\u2794 KATARZYNA PIEKARSKA:<\/strong>\n HVAC systems a source of secondary microbiological and chemical contamination of indoor air<\/a>\n <\/p>\n\n \n

\n DOI: 10.15199\/9.2025.11.3<\/span>\n \n
\n Zobacz streszczenie<\/a>\n
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S\u0142owa kluczowe:<\/strong> indoor air quality, sick building syndrome, HVA, CHEPA, microorganisms, VOC, MLZO<\/p>\n

Streszczenie:<\/strong>
The accumulation of pollutants in enclosed spaces adversely affects human comfort and health and leads to the so-called "Sick Building Syndrome" (SBS). For this reason, Indoor Air Quality (IAQ) in residential spaces and in buildings and public places has become an important determinant of the health and well-being of occupants. In 1987. The World Health Organization (WHO) published a list of symptoms associated with SBS: 1. Typically allergic complaints: mucositis, bronchial asthma, chronic laryngitis and bronchitis; 2. Non-allergic illnesses: migraines, irritability, concentration disorders; 3. Others: legionnaires' disease (caused by infection with the Legionella bacterium), air conditioning fever (humidifier fever), cancer, resulting from exposure to carcinogens such as tobacco smoke, asbestos and radon. According to the WHO and the U.S. National Institute for Occupational Safety and Health (NIOSH), these symptoms are related to indoor environmental problems, such as unfavorable room temperature, humidity, building moisture, ventilation flow, building materials, noise, lighting, exposure to microorganisms such as molds and bacteria, house dust mite allergens and volatile organic compounds; VOCs (Volatile Organic Compounds; VOCs) and microbial volatile organic compounds; MLZOs (Microbial Volatile Organic Compounds; MVOCs). The development of modern building technologies, global climate change and the drive for energy efficiency have led to a shift from natural (passive) ventilation systems to mechanical ventilation systems (Heating, Ventilation and Air Conditioning; HVAC) with different operating principles to ensure adequate indoor air exchange. A growing number of studies in recent years have indicated that air handling units can be a source of microorganisms and chemicals that cause secondary indoor contamination. This article presents a literature review on biological and chemical contaminants floating in indoor air. Particular attention was paid to volatile organic compounds, especially of microbial origin. The sources and causes of contaminants are discussed, as well as the possibility of chemical reactions in the air and on filters leading to the formation of secondary organic contaminants. Attention was given to the role of HVAC systems in managing microbial and chemical contaminants in indoor environments. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n

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\u2794 ANNA ARKUSZEWSKA-GOMULAK, ROBERT CICHOWICZ:<\/strong>\n Review of existing regulations on "Renewable Energy Sources" and "Air Quality" in light of information from the electronic legal database <\/a>\n <\/p>\n\n \n

\n DOI: 10.15199\/9.2025.11.4<\/span>\n \n
\n Zobacz streszczenie<\/a>\n
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S\u0142owa kluczowe:<\/strong> renewable energy sources, air quality<\/p>\n

Streszczenie:<\/strong>
The issues of "Renewable Energy Sources" and "Air Quality" are currently of interest to the scientific community, as well as to policy makers, local governments, social organizations and various individuals, due to their direct impact on public health and ecosystem functioning. For this reason, the authors of the article decided to analyze the "scale" of this impact and indicate the frequencies of such terms as: "Renewable Energy Sources" and "Air Quality" in the LEX Legal Information System - Wolters Kluwer. As a result, a quantitative assessment of the status of legal acts, court and administrative rulings, as well as related fields of law and administration with selected issues was carried out. As a result, an analysis of the differences and similarities for both passwords in Polish legislation was carried out. The results presented can provide a foundation for the identification of so-called "legislative gaps" and support the sustainable development of the environment with the use of new technologies. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n

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\u2794 RE Commodities:<\/strong>\n Biomass - a stable pillar of clean energy. ResInvest Commodities (formerly EP Resources) supports energy transition in Poland <\/a>\n <\/p>\n\n

At a time when Europe is intensifying its decarbonization and energy security efforts, biomass is increasingly seen not just as an alternative, but as a strategic component of a sustainable energy mix. Its potential is particularly evident in Central Europe, a region that has both the raw material resources and the experience in exploiting solid fuels. Why biomass? Biomass does not increase the amount of carbon dioxide in the atmosphere - it is a fuel with neutral [Open Access]. <\/div>\n \n
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\u2794 Robert Cichowicz:<\/strong>\n XXIX Forum of Polish Heating Engineers<\/a>\n <\/p>\n\n

Mi\u0119dzyzdroje September 15-17, 2025. On September 15-17, 2025, the XXIX Forum of Polish District Heating Engineers organized by the Economic Chamber of Polish District Heating took place in Mi\u0119dzyzdroje. It was another meeting for the exchange of knowledge and experience, attended by 840 people from all over the country and abroad, including former representatives from industry companies, manufacturers and suppliers of materials, equipment and technology, as well as people from government and local government administration, science and the media. The forum was held under the theme \"Transformation of the district heating sector taking into account the current geopolitical situation.\" The Forum was held under the honorary patronage of the Ministry of Climate and Environment and the Energy Regulatory Office, and the main Partners were: ECO, FORTUM, GPEC Group, PEC Gliwice, SEC, Veolia, UNISOFT, ORLEN TERMIKA. In addition, the Partner was the company: PGNiG GROUP ORLEN. On the other hand, industry media patrons were: CIRE, COW, INSTALL, NEW ENERGY, ENERGY DIRECTION, ENERGY AND RECYCLING. The forum began with the opening of EXPO MDK 2025 at the International Cultural Center Miedzyzdroje, during which 42 exhibitors presented technologies and solutions to support the transformation of the heating sector (Photo 1). Then, in the \"Inaugural Session\" the invited guests were welcomed and the proceedings of the XXIX Forum of Polish District Heating Engineers began (photo 2). The first item of the Session was the presentation of the \"LAUR of the district heating industry\" awards, which were given in the following categories: [...] <\/div>\n \n
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