heat loss
... The seasonal heat requirement of a house is 54GJ, which is to be supplied by a heating system with an overall house efficiency of 67%. The solid fuel used has a calorific value of 31MJ/kg. calculate the mass of fuel required for one heating ...
... The seasonal heat requirement of a house is 54GJ, which is to be supplied by a heating system with an overall house efficiency of 67%. The solid fuel used has a calorific value of 31MJ/kg. calculate the mass of fuel required for one heating ...
Energy, Heat and Temperature What is energy?
... Which of the two factors, mass or velocity, will have a greater effect on kinetic energy? • Velocity, because it is squared ...
... Which of the two factors, mass or velocity, will have a greater effect on kinetic energy? • Velocity, because it is squared ...
WS- Specific heat
... 1. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC) 2. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC) ...
... 1. How many calories of heat are required to raise the temperature of 550 g of water from 12.0 oC to 18.0 oC? (remember the specific heat of water is 1.00 cal/g x oC) 2. How much heat is lost when a 640 g piece of copper cools from 375 oC, to 26 oC? (The specific heat of copper is 0.38452 J/g x oC) ...
Ch 16 Thermal Energy and Heat
... Thermodynamics is the study of conversions between thermal energy and other forms of energy 1. First law of Thermodynamics o Energy cannot be created or destroyed but id can be converted into different forms. o The first law of thermodynamics stats that energy is conserved o If energy is added to ...
... Thermodynamics is the study of conversions between thermal energy and other forms of energy 1. First law of Thermodynamics o Energy cannot be created or destroyed but id can be converted into different forms. o The first law of thermodynamics stats that energy is conserved o If energy is added to ...
Lecture 36.Thermodyn..
... The baseball field, with the lower specific heat, will change temperature more readily, so it will cool off faster. The high specific heat of concrete allows it to “retain heat” better and so it will not cool off so quickly—it has a higher “thermal inertia.” ...
... The baseball field, with the lower specific heat, will change temperature more readily, so it will cool off faster. The high specific heat of concrete allows it to “retain heat” better and so it will not cool off so quickly—it has a higher “thermal inertia.” ...
Energy Savings Through Radiant Heat
... your heating bill is a winning combination. Multiple zoning, thermal mass, off-peak rates, even heat distribution and lower temperature settings are just some of the strategies that reduce energy bills with radiant heating. Multiple zoning allows you to turn down thermostats in rooms not be used. Ev ...
... your heating bill is a winning combination. Multiple zoning, thermal mass, off-peak rates, even heat distribution and lower temperature settings are just some of the strategies that reduce energy bills with radiant heating. Multiple zoning allows you to turn down thermostats in rooms not be used. Ev ...
Detecting temperature change External temperature change
... particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun ...
... particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun ...
Page|1 - askIITians
... When a system is taken from state A to state B along the path ACB, 80 Kcal of heat flows into the system and 30 kcal of work done. a. How much heat flows into the system along path ADB if the work done is 10 kcal? b. When the system is returned from B to A along the curve path. The work done is 20 k ...
... When a system is taken from state A to state B along the path ACB, 80 Kcal of heat flows into the system and 30 kcal of work done. a. How much heat flows into the system along path ADB if the work done is 10 kcal? b. When the system is returned from B to A along the curve path. The work done is 20 k ...
LATENT HEAT STORAGE SYSTEMS
... Researchers search the new and renewable energy sources to reduce the CO2 emissions from the combustion of fossil fuels, particularly in areas where low temperature applications are involved. Solar energy has an enormous potential for the heating and cooling of buildings, producing hot water for dom ...
... Researchers search the new and renewable energy sources to reduce the CO2 emissions from the combustion of fossil fuels, particularly in areas where low temperature applications are involved. Solar energy has an enormous potential for the heating and cooling of buildings, producing hot water for dom ...
3-10-09 Thermodynamics
... Compression or expansion of a gas, when no heat enters or leaves is said to be adiabatic. Adiabatic changes occur so rapidly that the heat has little time to enter or leave. – The best example is the cylinders in an ...
... Compression or expansion of a gas, when no heat enters or leaves is said to be adiabatic. Adiabatic changes occur so rapidly that the heat has little time to enter or leave. – The best example is the cylinders in an ...
PS#3
... 1. Equal masses of methane at 300 K and ethylene at 600 K are mixed such that the pressure is constant, and no heat can escape. What will be the final temperature? Methane: Cp,m = 35.46 J K-1 mol-1. Ethylene: Cp,m = 42.17 J K-1 mol-1. Hint: Think about H for the overall process. 2. Considering H2O ...
... 1. Equal masses of methane at 300 K and ethylene at 600 K are mixed such that the pressure is constant, and no heat can escape. What will be the final temperature? Methane: Cp,m = 35.46 J K-1 mol-1. Ethylene: Cp,m = 42.17 J K-1 mol-1. Hint: Think about H for the overall process. 2. Considering H2O ...
Calorimetry and Specific Heat
... • Cup within a cup, air insulated • Obtain hot water in known amount with known temperature. • Put into known amount of antifreeze in cup of known mass and specific heat and stir • Heat lost by water = heat gained by AF and cup • mWcW(TW-TF) = mAcA(TF-TA) + mCcC(TF-TA) • cA = {mWcW(TW-TF) - mCcC(TF- ...
... • Cup within a cup, air insulated • Obtain hot water in known amount with known temperature. • Put into known amount of antifreeze in cup of known mass and specific heat and stir • Heat lost by water = heat gained by AF and cup • mWcW(TW-TF) = mAcA(TF-TA) + mCcC(TF-TA) • cA = {mWcW(TW-TF) - mCcC(TF- ...
Calorimetry
... 4. Place the thermometer into the mouth of the can. Remember to suspend the thermometer in the water when taking a temperature reading. Before going any further, check the apparatus to make sure that everything is secured. 5. Fashion a stand for the peanut out of a paperclip, and place this stand an ...
... 4. Place the thermometer into the mouth of the can. Remember to suspend the thermometer in the water when taking a temperature reading. Before going any further, check the apparatus to make sure that everything is secured. 5. Fashion a stand for the peanut out of a paperclip, and place this stand an ...
File
... • Kinetic energy can turn into potential energy, which can turn into kinetic energy and so on. ...
... • Kinetic energy can turn into potential energy, which can turn into kinetic energy and so on. ...
Chemistry-Study-Guide-for-Spring-2014
... 12. Explain the relationship between kinetic energy, potential energy, temperature and heat*. HINT (start by looking at the definition for each term and then see how they relate). ...
... 12. Explain the relationship between kinetic energy, potential energy, temperature and heat*. HINT (start by looking at the definition for each term and then see how they relate). ...
Condensation and the Nusselt`s Film Theory
... As we can see from this equation, the heat transfer coefficients are large for small temperature differences ts-tw and heights L. In both cases the condensate film is thin and hence the heat transfer resistance is low. Equation (11) can also be used for film condensation at the inner or outer walls ...
... As we can see from this equation, the heat transfer coefficients are large for small temperature differences ts-tw and heights L. In both cases the condensate film is thin and hence the heat transfer resistance is low. Equation (11) can also be used for film condensation at the inner or outer walls ...
Geology :: 3. Energy and the Dynamic Earth
... conduction. Conduction does not cause the movement of hot material from one place to another. The atoms remain in the crystalline structure and transport the heat by oscillation. In gases and liquids, heat transport take place by convection. Convection, unlike conduction, does cause movement. It is ...
... conduction. Conduction does not cause the movement of hot material from one place to another. The atoms remain in the crystalline structure and transport the heat by oscillation. In gases and liquids, heat transport take place by convection. Convection, unlike conduction, does cause movement. It is ...
Cogeneration
Cogeneration or combined heat and power (CHP) is the use of a heat engine or power station to generate electricity and useful heat at the same time. Trigeneration or combined cooling, heat and power (CCHP) refers to the simultaneous generation of electricity and useful heating and cooling from the combustion of a fuel or a solar heat collector. Cogeneration is a thermodynamically efficient use of fuel. In separate production of electricity, some energy must be discarded as waste heat, but in cogeneration this thermal energy is put to use. All thermal power plants emit heat during electricity generation, which can be released into the natural environment through cooling towers, flue gas, or by other means. In contrast, CHP captures some or all of the by-product for heating, either very close to the plant, or—especially in Scandinavia and Eastern Europe—as hot water for district heating with temperatures ranging from approximately 80 to 130 °C. This is also called combined heat and power district heating (CHPDH). Small CHP plants are an example of decentralized energy. By-product heat at moderate temperatures (100–180 °C, 212–356 °F) can also be used in absorption refrigerators for cooling.The supply of high-temperature heat first drives a gas or steam turbine-powered generator and the resulting low-temperature waste heat is then used for water or space heating as described in cogeneration. At smaller scales (typically below 1 MW) a gas engine or diesel engine may be used. Trigeneration differs from cogeneration in that the waste heat is used for both heating and cooling, typically in an absorption refrigerator. CCHP systems can attain higher overall efficiencies than cogeneration or traditional power plants. In the United States, the application of trigeneration in buildings is called building cooling, heating and power (BCHP). Heating and cooling output may operate concurrently or alternately depending on need and system construction.Cogeneration was practiced in some of the earliest installations of electrical generation. Before central stations distributed power, industries generating their own power used exhaust steam for process heating. Large office and apartment buildings, hotels and stores commonly generated their own power and used waste steam for building heat. Due to the high cost of early purchased power, these CHP operations continued for many years after utility electricity became available.