Wyniki wyszukiwania - BazTech

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Monitoring temperatury w pionowym odwiercie pompy ciepła

Fidorów N., Szulgowska-Zgrzywa M.

Rynek Instalacyjny

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2015

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Nr 4

36--40

PL

Artykuł zawiera wybrane wyniki obserwacji poczynionych w trakcie monitoringu pracy pompy ciepła solanka/woda wytwarzającej ciepło na potrzeby instalacji ogrzewania podłogowego w Centrum Technologii Energetycznych w Świdnicy. Zaprezentowano profil bazowy temperatury gruntu oraz zmiany temperatury w jednym z odwiertów dolnego źródła w trakcie sezonu grzewczego. Dla okresu od 1 do 14 marca 2013 r. przedstawiono szczegółowe wyniki monitoringu temperatury solanki i odwiertu oraz energii pobieranej z odwiertu. Wyznaczono wartości rzeczywistej jednostkowej mocy cieplnej pobieranej z odwiertu i porównano je z wartościami obliczonymi na podstawie danych literaturowych.

EN

The paper contains selected results of the observations made during whole year monitoring of the brine-to-water heat pump installation system that produces heat for the floor heating system in Energy Technology Center building in Świdnica. The measurements showing work conditions for one of the boreholes has been chosen. The base temperature profile and temperature changes during heating season has been presented. Detailed monitoring results of brine and borehole temperature as well as amounts of energy drawn from borehole for period from 1st to 14th March 2013 has been given. The unit values of borehole thermal power per meter have been established and compared with calculated ones.

2

Wpływ sprawności promienników podczerwieni na koszt zużycia energii

Dudkiewicz E., Fidorów N., Jeżowiecki J.

Rocznik Ochrona Środowiska

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2013

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Tom 15, cz. 2

1804--1817

EN

Gas-fired infrared radiators become more widely used in large-space buildings. This is due to the way of use of the hall, distribution of work stations and the heat upward lifting in convection heating. Despite the advantages of gas-fired radiators and significant savings in comparison to other heating systems, the breach of thermal conditions and thermal discomfort of workers is often observed as the result of the incorrect selected number and power of the devices. Majority of designers take into consideration a heat power of radiators not the power of radiation send towards occupied zone. Efficiency of radiators without or with poor radiating screen insulation equals 45 to 55%. As the result the installed heating power should be twice greater than calculated heating load. Unfortunately most producers do not provide the radiation efficiency of devices. This results from the necessity of execution of expensive examinations according to the PN-EN 419-2 standard, that are not conducted in Poland. Some radiators with radiation efficiency as high as 80% appeared on the market. Their price is over twice higher than low efficient radiators. Three types of radiators, taking in account radiation efficiency, have been selected for calculation example. Their gas consumption during heating season have been compared. Cumulative cost analysis have been performed for those systems for two fuel tariffs. The analysis showed that the choice of tariff influence the heating costs for chosen type of radiators. The investment with high initial cost, because of high price of more efficient system starts to pay back after three years. Moreover in the article the rules for selection of ceramic gas-fired radiators and definitions of efficiencies have been given and the methodology of the radiation efficiency examination, according to the PN-EN 419-2 standard, have been described.

3

Analiza zużycia energii dla grzewczych systemów promieniujących

Dudkiewicz E., Fidorów N., Jeżowiecki J.

Rocznik Ochrona Środowiska

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2013

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Tom 15, cz. 3

2293--2308

EN

Infrared radiators are more and more commonly applied economical heating system that is recommended for the warehouses production or sport halls and other buildings that have large cubature. Among the radiant systems, gas-fired ceramic and water radiators are most often used. In the article the most important features, advantages, disadvantages and main rules for design of infrared radiator used in the halls of large cubature have been described. In order to perform energetic analysis four conception heating systems have been designed for the production hall, assuming the same thermal conditions inside. Tree radiant systems, one with water radiators and two with gas-fired radiators – installed parallel and at angle to the floor; have been compared among each other and with fourth convective system. It has been designated that in literature there is no guidance for calculation of the fuel demand for radiant systems, as well as lack of data concerning the efficiency of systems and other coefficients influencing the calculation of projected fuel consumption. The new formula for seasonal fuel demand, taking into account the character of radiant heating, have been given. Seasonal heat and fuel demand have been calculated for three radiant systems. The outcomes have been compared with calculation made for convection system. Energy demand analysis showed that implementing various radiant heating systems gives from 11% to 43% of savings in comparison to convection system. Moreover it turned out that application of the gas-fired radiators gives about 10% of savings in comparison to the water radiant system and installing radiators at angle to the floor gives further savings in comparison to other solutions.

4

Efektywność energetyczna pompy ciepła powietrze-woda pracującej w funkcji krzywej regulacji

Fidorów N., Bartnicki G.

Rynek Energii

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2012

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Nr 5

38--40

PL

W Instytucie Klimatyzacji i Ogrzewnictwa Politechniki Wrocławskiej przeprowadzono badania energetycznej efektywności pompy ciepła powietrze-woda przygotowującej czynnik grzewczy o temperaturze ustalanej w funkcji krzywej regulacji, w zależności od temperatury zewnętrznej. Celem tych badań było określenie wpływu takich warunków regulacji na efektywność energetyczną pompy ciepła w porównaniu z pracą ze stałą w sezonie wartością temperatury zasilania. Statystyczną analizę wyników uzyskanych na podstawie danych pomiarowych przeprowadzono przy wykorzystaniu narzędzi dostępnych w programie Statistica. Zbudowano modele regresji współczynnika efektywności energetycznej w zależności od temperatury powietrza zasilającego parownik oraz od temperatury wody grzewczej w układzie badawczym. Charakterystykę wyznaczoną dla pracy w oparciu o krzywą regulacji porównano z charakterystykami przy utrzymywaniu stałych temperatur zasilania. Uzyskane wyniki potwierdzają, że praca pompy ciepła w oparciu o krzywą regulacji pozwala na osiągnięcie wyższej efektywności energetycznej i lepsze wykorzystanie potencjału pompy ciepła powietrze-woda podczas sezonu grzewczego niż przy pracy stałotemperaturowej.

EN

The research concerning energy efficiency of an air-to-water heat pump, by which a temperature of heating agent is determined in regulation curve in function of outdoor temperature, have been performed in Institute of Air Conditioning and District Heating in Wrocław University of Technology. The scope of research was to determine the influence of such regulation conditions on the heat pump coefficient of performance in comparison to the work with constant flow temperature during heating season. The statistical analysis of the results gained from measurement data have been performed by means of the tools available in Statistica computer programme. The regression models of the coefficient of performance in function of the temperature of the air supplied to the evaporator and in function of the flow temperature of the system. The characteristics determined for the labour mode based on heating curve have been compared with characteristics of heat pump working with constant flow temperature. The obtained results confirm that the heat pump working along heating curve, let achieve higher energy performance and better use of heat pump potential during the heating season, than while working with constant flow temperature.