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1
Content available remote Evacuated tubular or classical flat plate solar collectors?
100%
Pluta Z.
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tom Vol. 91, nr 3
158-164
EN
Evacuated tubular solar collectors are increasingly used all over the world due to their low coefficients of heat losses to the environment. They are presented as devices that collect much larger quantities of solar energy than are usually obtainable from typical flat collectors. However, they suffer from the poor radiation transmissivity characteristics of the transparent shield covering the absorber. This makes the profits in terms of energy gain in the operating conditions of a typical solar power system in Poland only slightly dependent on the nature of the solar collectors used. This article seeks to explain this phenomenon through theoretical considerations.
2
Mozliwosc wykorzystania natryskowo-wyparnych chlodnic cieczy do bezposredniej klimatyzacji pomieszczen
100%
Pluta Z.
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nr 12
10-14
3
Content available remote Jakie okno i jaki okap
100%
Pluta Z.
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2000
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tom R. 31, nr 1
34-36
PL
Artykuł jest wynikiem dyskusji w gronie specjalistów, zajmujących się wykorzystaniem energii promieniowania słonecznego, wywołanej publikacją dr inż. Doroty Chwieduk pt. "Wybrane przykłady nowoczesnych rozwiązań stosowanych w budownictwie niskoenergetycznym" (COW 7 /99). Odpowiedź Autorki zamieszczona jest w COW 1/2000, str. 37-38
4
Content available remote Klimatyzacja pasywna i wyparna
100%
Pluta Z.
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tom nr 12
57--61
PL
W artykule przedstawiono zagadnienia związane z metodami pasywnego (bez dostarczania energii napędowej) wyparnego chłodzenia strumienia powietrza wykorzystywanego następnie do wentylacji /chłodzenia / klimatyzowania pomieszczeń. Niezbędne przepływy strumienia powietrza mogą być indukowane energią kinetyczną wiatru i wspomagane energią promieniowania słonecznego, zaś schładzanie powietrza następuje w procesie jego nawilżania. Metody takie znane są od blisko 2500 lat, jednak rozwój sprężarkowych i absorpcyjnych urządzeń chłodniczych pomniejszył znaczenie pasywnych instalacji klimatyzacyjnych jako mało wydajnych. Obecnie, w następstwie rosnących cen energii i konieczności ochrony środowiska naturalnego, następuje stopniowy powrót do doświadczeń naszych przodków. Poza tradycyjnym chłodzeniem pomieszczeń, instalacje pasywne umożliwiają klimatyzację otwartych przestrzeni urbanistycznych, takich jak: ciągi uliczne, otwarte miejsca zgromadzeń publicznych itp.
EN
This paper discusses issues related to the methods of passive (without providing a driving power) evaporative cooling of air to be utilised for cooling / air-conditioning of living spaces. The necessary air stream flows can be induced by kinetic energy of wind sometimes assisted with a solar energy. Required air cooling is obtained in the process of its moisturizing. The first installations of this type appeared close to 2,500 years ago. Now, according to the growing energy prices and the needs for the protection of the environment, a gradual return to the experience of our ancestors occurs. In addition to the traditional cooling tasks, passive systems allow air conditioning of urban spaces such as: street sequences, open space public meeting places etc.
5
Słoneczne kolektory próżniowe rurowe czy klasyczne kolektory płaskie?
100%
Pluta Z.
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2002
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tom T. 3, z. 22
919-928
PL
Kolektory słoneczne próżniowe, coraz częściej wykorzystywane w naszym kraju, z uwagi na niskie wartości współczynników strat ciepła do otoczenia, przedstawiane są jako urządzenia pozwalające na gromadzenie znacznie większych ilości energii słonecznej niż zazwyczaj jest to możliwe do uzyskania w kolektorach płaskich. Mają one jednak niekorzystne charakterystyki transmisyjności promieniowania przez osłony przezroczyste absorbera co powoduje, że w typowych warunkach eksploatacji instalacji słonecznych w naszym kraju, zyski energetyczne instalacji w niewielkim tylko stopniu zależą od rodzaju zastosowanych kolektorów.
EN
The vacuum tube solar collectors are considered as an equipment collecting much more of solar energy compared with the flat plate collectors. This opinion is due to the very low heat loss coefficients caused by vacuum. However glass cover of cylindrical shape have unfavourable transmittance characteristics of solar radiation and quantity of solar energy reaching absorber plate is smaller than that for flat transparent cover. So solar energy gains of solar domestic hot water units operating in Polish climatic conditions are weakly dependent on type of collector used.
6
Content available Vertical Fall of a Body Under Free Motion
63%
Pluta Z. , Hryniewicz T.
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tom Vol. 4
56-72
EN
The paper aims at the kinetics of a body under free fall, especially free body motion, the motion occurring in the Earth environs space, that is in the range of the gravity action. A new adequate theory of such a motion, opening new not known kinetic magnitudes, has been elaborated. This theory has its source, which is the dependence of the way length on time. That is the way characteristics created in this work. The worked out theory has been verified by experiment, referred to two different realities. One of them was the body motion in the air environment of the Earth environs space, with the second one occurring in a determined machining space-time. The adequate earth acceleration/gravity has been calculated taking advantage of the theory elaborated; and its value, as indicated, is equal 3.85 mźs-2. Two kinds of accelerations have been separated: inertial and gravitational. The relations occurring between their values on the neighbouring potential fields, unstable, and stable, have been discovered. That discovery indicates on the existence of quantum nature of gravitation.
7
Content available Kinetics, Dynamics and Energy of Solid on the Example of a Tool Fixed Flexibly: Part 1 – Kinetics
63%
Pluta Z. , Hryniewicz T.
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2013
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tom Vol. 10, iss. 1
35-47
EN
This work investigates kinetics, dynamics and energy of solid on the example of a tool fixed flexibly under the process of cutting. The original approach to the tool kinetics was considered by the Authors earlier. This work consists with three parts referred to the kinetics, dynamics, and energy of solid. Present work is concerned on the development of kinetics problems of a solid represented by a tool fixed flexibly and is a continuation of the problem. Part 1 covers the definition and characteristics of the machining space-time and is referred generally to the kinetics. Then the kinetic and dynamic magnitudes characterizing tool in the space-time are described. The set of these magnitudes has been extended by introducing the properly understood impulse and time-effect. Part 2 of the work is to consider the dynamics of tool in the machining space-time. In Part 3, types of works in the machining space-time and energy of the tool fixed flexibly will be considered; the focus is to be put on an essential difference between work and energy.
8
Content available Adequate theory of oscillator: a prelude to verification of classical mechanics. Part 2
63%
Pluta Z. , Hryniewicz T.
|
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tom Vol. 3
1-10
EN
In the paper, the adequate theory of oscillator is presented, being a sort of prelude to verification of the classical theory of mechanics. In the first part of the paper the principle of energy conservation was considered. This second part of the paper is to present the energetic aspects of oscillator motion. Here also an exemplary real system corresponding with the existent differential equation of oscillator is given. They are to develop the kinetics of a body in the harmonic motion, to be presented in the next Part of the work.
9
Content available Adequate theory of oscillator : a prelude to verification of classical mechanics. Part 4
63%
Pluta Z. , Hryniewicz T.
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tom Vol. 4
1-7
EN
In the paper, the adequate theory of oscillator is presented, being a sort of prelude to verification of the classical theory of mechanics. The developed theory is based on a properly understood notion of energy, quantum value changes of its determined measures (potentials), as well as of such chan ges types of sites of full energetic states which presents the essence of the true principle of the energy conservation. In the first part of the paper the principle of energy conservation was considered. Then the energetic aspects of the oscillator motion, with an exemplary real system motion was presented. The third part was a development of kinetics of a body in the harmonic motion and verification of the adequate theory of the oscillator. At the end, this Part 4 is devoted to the determination of the gravity acceleration by means of the mathematical pendulum to confirm the previously presented findings.
10
Content available Adequate theory of oscillator: a prelude to verification of classical mechanics. Part 3
63%
Pluta Z. , Hryniewicz T.
|
|
tom Vol. 3
11-23
EN
In the paper, the adequate theory of oscillator is presented, being a sort of prelude to verification of the classical theory of mechanics. The developed theory is based on a properly understood notion of energy, quantum value changes of its determined measures (potentials), as well as of such chan ges types of sites of full energetic states which presents the essence of the true principle of the energy conservation. In the first part of the paper the principle of energy conservation was considered. Then the energetic aspects of the oscillator motion, with an exemplary real system motion, were presented in the second Part. This part of the paper is devoted to the kinetics of a body in harmonic motion and verification of the adequate theory of oscillator. At the end, the determination of the gravity acceleration by means of mathematical pendulum is performed to confirm the presented findings.
11
Content available On the fictional and real lost gravitation force
63%
Pluta Z. , Hryniewicz T.
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tom Vol. 4
8-16
EN
The paper covers a critical approach to the natural reality study which is the method of scientific cognition. The existent so called d`Alembert's rule is the link of reality on which the specific attention is focused. The critics is directed to the fictional inertia force covered in the mentioned rule. The necessity for its elimination from the reality description has been presented. Instead, it is proved that a real inertia force occurs. A proper exemplification material has been delivered with two examples of force equilibrium of the system. One of them refers to a rigid system being both under stable and unstable states. The second one covers also these two states but it is referred to a mass-flexible system. Finally, the discussed solution of the problem has been explained on the example of mathematic pendulum and a mass-string system.
12
Content available Quantum theory of gravitation
63%
Pluta Z. , Hryniewicz T.
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tom Vol. 5
35-45
EN
In the paper, the outline of a new quantum theory of gravitation is presented. The energetic states of a material body, stable and unstable, are described. Characteristics of a body motion in a gravitation-inertia space-time has been given. It has been proved that all the time both gravitation and inertia are co-existent, independent on the position of a moving object. This is the reason of that twolink name of the space-time. A thorough in-depth analysis of the problem made it possible to state that so called the law of common gravity is a hyperbolic approximation of a proper course of inertia force. Therefore the mentioned courses have only two common points. One of them, the initial point belongs also to the course line of the gravity force, constant on the whole length of space-time. This theory is adequate in character and thus generally does not corresponds with the existent classical theory of gravitation.
13
Content available Analytical dependence of substance solubility measure on temperature
63%
Pluta Z. , Hryniewicz T.
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tom Vol. 5
20-34
EN
The work covers an adequate analytical dependence of solubility measure of the chemical substances on the water/aqueous solution temperature. The solubility was defined and new, more readable solubility measure was introduced; the coefficient of solubility has been proposed instead. Then the source differential equation was introduced as the basis for the derivation of a final analytical form of dependence of the solubility coefficient on temperature. That characteristics has been developed by determining the dependence of the solubility coefficient variability intensity on temperature. An example of the use of presented theory has been delivered by referring it to the phenomenon of dissolution of AgNO3 silver nitrate in the aqueous environment. In the summary, quite a developed use of the source differential equation has been underlined with some more examples revealed.
14
Content available Adequate theory of oscillator: a prelude to verification of classical mechanics. Part 1
63%
Pluta Z. , Hryniewicz T.
|
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tom Vol. 2
28-34
EN
In the paper, the adequate theory of oscillator is presented, being a sort of prelude to verification of the classical theory of mechanics. The developed theory is based on properly understood the notion of energy, on quantum value changes of its determined measures (potentials), as well as of such chan ges types of sites of the total energetic states which present the essence of the true principle of energy conservation. General characteristics of classical mechanics is presented by exemplification of artifacts of classical theory of oscillator, energetic aspects of its motion, kinetics of the body In harmonic motion, and finely a new adequate theory of oscillator. This is the first part of the theory.
15
Badania dynamiczne kolektorów słonecznych z wykorzystaniem symulatora promieniowania słonecznego
63%
Pluta Z. , Wnuk R.
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2002
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tom T. 3, z. 22
929-938
PL
Dynamiczne metody badań kolektorów pozwalają na określenie podstawowych charakterystyk cieplnych kolektorów słonecznych na podstawcie krótkoterminowych badań w warunkach naturalnych lub symulacyjnych przy braku stanów ustalonych zarówno samego kolektora (parametrów czynnika przepływającego przez kolektor), jak i warunków otoczenia (gęstości i kierunku strumienia promieniowania słonecznego, udziału promieniowania dyfuzyjnego oraz temperatury otoczenia). Zwyczajowo charakterystyki takie uzyskuje się z badań kolektorów prowadzonych dla stanów ustalonych, co może być niezwykle kłopotliwe przy badaniach w warunkach naturalnych. W referacie przedstawiono próbę uzyskania charakterystyki z pomiarów prowadzonych w stanach nieustalonych. Uzysiwne wyniki porównano z pomiarami prowadzonymi statyczną metodą normową.
EN
Solar collector performance characteristics can be obtained from relatively short-term experiments employed dynamics test methods. These investigations can be conducted both in outdoor or simulated environments assuming transient states of collector and weather parameters (temperature, solar energy flux etc.). Traditional measurement procedures for collector characteristics require certain strict limits for weather and operating condition during tests, so test carried out in outdoor conditions are very laborious. This communication presents example of integral dynamic method applied to measurements conducted in laboratory equipped -with solar radiation simulator.
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