Economical heating Part 1 | Satcitananda - Instruction Riki
Prices rechargeable car heater mathematics instruction in mathematics Mind Mapping How to build knowledge of equations and inequalities expressed Graph functions of the crowd Numeric Sequences Vectors higher business rechargeable car heater mathematics and physics rechargeable car heater Lessons Prices are interested in physics instruction tasks in Physics Coursework in physics Flash animation physics measurement units Movement - plonkiči in Physics and Physics Instruction ecology electrical engineering tasks Resolved Electrical Instruction chemistry English English to French French demanding for demanding Slovenian Slovenian demanding German
Lot contributions "Economical heating" contains five articles. Questions to which we want to answer are: How does the thermal energy of the space for the premises wasting heat and how to reduce heat izugube the facility. Last, the fifth article contains calculations of how much we are losing heat by venting and how to minimize these losses.
In the introductory chapter summarizes the basic concepts and equations rechargeable car heater that we will use in the following chapters. Some of the terms will be for reasons of transparency rechargeable car heater and readability of the article in the following contributions again. Heat conduction
Heat to "drain" through the wall must be replaced with a heat (eg radiators), we will have a constant temperature in the room. At a constant temperature difference between the heat flux equal to the required strength of the radiator.
About heat transfer is when heat passes from one medium to another: eg. of solids in a gaseous substance or a liquid or from a liquid to a gaseous substance, and in the opposite direction. Due to heat transfer, for example. winter wall in the house a little cooler than the interior space and the exterior wall a little warmer than the surrounding air.
where h is the coefficient of heat transfer coefficient. The coefficient h is calculated only approximately, since it depends rechargeable car heater on many parameters: the speed of movement of the gas or liquid (forced or natural convection), its thermal conductivity and the contact surface. Example of calculating rechargeable car heater transfer coefficient using the Nusselt numbers in the paper Economical heating, 2 part.
Influence of heat transfer on the thermal conductivity is significantly higher in poor insulation of the walls. In good insulation heat transfer can be neglected and therefore heat dissipation independent of external influences (eg wind).
Convection is heat diffusion due to the natural circulation of gas or liquid. Example: heated air at the radiator has a lower specific gravity than the cold and rises due to buoyancy. During lifting it cools and falls again. The process is repeated circular. Air speeds are dependent on the volume expansion coefficient of gas dynamic viscosity, thermal conductivity gas, etc.. Wind or convection affect, for example. transfer coefficient on the coefficient of the outer wall against rechargeable car heater in surrounding air. Radiation
Heat graduation from inside the rooms on the glass, the glass in the intermediate space again on the glass and in the surrounding air. The main thermal resistance represents a gas between the two panes. It may be air or a noble gas. Noble gases have a 1.4 (argon) to 4.5 times (xenon) lower thermal conductivity than air.
Additional heat losses represent heat radiation. Inside the glass, heated to approximately room temperature, the strain waves of heat back into the room and to the outer glass. Outside the glass partially radiated back to the inner glass and the outer surroundings. The coefficient of radiation window manufacturers reduced by nizkosevalnimi rechargeable car heater spreads on the inside of the outer glass. rechargeable car heater The purpose of these spreads is to reflect the heat radiation of larger wavelength (infrared radiation) and leave as much as possible the visible light.
It is noteworthy that the maximum allowable transfer coefficient of windows regulated by law (COD L. RS, No. 8 of 12 3 1996). Only windows filled with inert gas and nizkoizsevnim coating meets the mentioned law.
Let's take a double window (unframed). Mad are 4 mm wide, the spacing between the two panes is 16 mm. The space between the two panes is filled with an inert gas Argon. Antiemisijski the outer glass coating. Details are as follows:
In the calculation we take into account the heat transfer between rechargeable car heater the glass - gas. Due to the low thermal conductivity of the heat transfer effect of small (see example rechargeable car heater in section Heat transfer). We also did not take into account the multiple reflection of radiation on both windows. This is justified because the external emissivity glass is small.
Since the radiant flux proportional to the fourth power of the absolute temperature and conductivity of the window to the difference of temperature follows that the transition of energy-efficient windows depends on the absolute temperature in the apartment.
References: Bojan Kraaut: rechargeable car heater Mechanical Manual; tehnicke book of Zagreb, 1987; Page 210-221, Sec. Heat transfer Herr Horst: The Science of heat; Tehnikška publisher Slovenia, 1997, page 180-218, Sec. Heat transfer Mića Maric, Duro Maricic: Thermodynamics s heat transfer; izdavač: The first book Commune, Mostar, Belgrade, 1986; Sec. 6: Heat table
Economy 7 heating Economical part og
Prices rechargeable car heater mathematics instruction in mathematics Mind Mapping How to build knowledge of equations and inequalities expressed Graph functions of the crowd Numeric Sequences Vectors higher business rechargeable car heater mathematics and physics rechargeable car heater Lessons Prices are interested in physics instruction tasks in Physics Coursework in physics Flash animation physics measurement units Movement - plonkiči in Physics and Physics Instruction ecology electrical engineering tasks Resolved Electrical Instruction chemistry English English to French French demanding for demanding Slovenian Slovenian demanding German
Lot contributions "Economical heating" contains five articles. Questions to which we want to answer are: How does the thermal energy of the space for the premises wasting heat and how to reduce heat izugube the facility. Last, the fifth article contains calculations of how much we are losing heat by venting and how to minimize these losses.
In the introductory chapter summarizes the basic concepts and equations rechargeable car heater that we will use in the following chapters. Some of the terms will be for reasons of transparency rechargeable car heater and readability of the article in the following contributions again. Heat conduction
Heat to "drain" through the wall must be replaced with a heat (eg radiators), we will have a constant temperature in the room. At a constant temperature difference between the heat flux equal to the required strength of the radiator.
About heat transfer is when heat passes from one medium to another: eg. of solids in a gaseous substance or a liquid or from a liquid to a gaseous substance, and in the opposite direction. Due to heat transfer, for example. winter wall in the house a little cooler than the interior space and the exterior wall a little warmer than the surrounding air.
where h is the coefficient of heat transfer coefficient. The coefficient h is calculated only approximately, since it depends rechargeable car heater on many parameters: the speed of movement of the gas or liquid (forced or natural convection), its thermal conductivity and the contact surface. Example of calculating rechargeable car heater transfer coefficient using the Nusselt numbers in the paper Economical heating, 2 part.
Influence of heat transfer on the thermal conductivity is significantly higher in poor insulation of the walls. In good insulation heat transfer can be neglected and therefore heat dissipation independent of external influences (eg wind).
Convection is heat diffusion due to the natural circulation of gas or liquid. Example: heated air at the radiator has a lower specific gravity than the cold and rises due to buoyancy. During lifting it cools and falls again. The process is repeated circular. Air speeds are dependent on the volume expansion coefficient of gas dynamic viscosity, thermal conductivity gas, etc.. Wind or convection affect, for example. transfer coefficient on the coefficient of the outer wall against rechargeable car heater in surrounding air. Radiation
Heat graduation from inside the rooms on the glass, the glass in the intermediate space again on the glass and in the surrounding air. The main thermal resistance represents a gas between the two panes. It may be air or a noble gas. Noble gases have a 1.4 (argon) to 4.5 times (xenon) lower thermal conductivity than air.
Additional heat losses represent heat radiation. Inside the glass, heated to approximately room temperature, the strain waves of heat back into the room and to the outer glass. Outside the glass partially radiated back to the inner glass and the outer surroundings. The coefficient of radiation window manufacturers reduced by nizkosevalnimi rechargeable car heater spreads on the inside of the outer glass. rechargeable car heater The purpose of these spreads is to reflect the heat radiation of larger wavelength (infrared radiation) and leave as much as possible the visible light.
It is noteworthy that the maximum allowable transfer coefficient of windows regulated by law (COD L. RS, No. 8 of 12 3 1996). Only windows filled with inert gas and nizkoizsevnim coating meets the mentioned law.
Let's take a double window (unframed). Mad are 4 mm wide, the spacing between the two panes is 16 mm. The space between the two panes is filled with an inert gas Argon. Antiemisijski the outer glass coating. Details are as follows:
In the calculation we take into account the heat transfer between rechargeable car heater the glass - gas. Due to the low thermal conductivity of the heat transfer effect of small (see example rechargeable car heater in section Heat transfer). We also did not take into account the multiple reflection of radiation on both windows. This is justified because the external emissivity glass is small.
Since the radiant flux proportional to the fourth power of the absolute temperature and conductivity of the window to the difference of temperature follows that the transition of energy-efficient windows depends on the absolute temperature in the apartment.
References: Bojan Kraaut: rechargeable car heater Mechanical Manual; tehnicke book of Zagreb, 1987; Page 210-221, Sec. Heat transfer Herr Horst: The Science of heat; Tehnikška publisher Slovenia, 1997, page 180-218, Sec. Heat transfer Mića Maric, Duro Maricic: Thermodynamics s heat transfer; izdavač: The first book Commune, Mostar, Belgrade, 1986; Sec. 6: Heat table
Economy 7 heating Economical part og
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