Heating Systems for Low Energy Buildings
... Peak loads may only occur for short periods of time, hence there are benefits to several smaller systems rather than one large system. The primary system should be as efficient as possible such as a condensing boiler if appropriate. Modular systems also have the benefit that extra modules can be ad ...
... Peak loads may only occur for short periods of time, hence there are benefits to several smaller systems rather than one large system. The primary system should be as efficient as possible such as a condensing boiler if appropriate. Modular systems also have the benefit that extra modules can be ad ...
the hybrid fridge
... easily adopted by fishermen, vegetable farmers among others to increase productivity and reduce waste. The absorption fridge is unique type of refrigerator that uses thermal compression as compared to the conventional mechanical compression. It uses low quality heat, such as engine exhaust heat or s ...
... easily adopted by fishermen, vegetable farmers among others to increase productivity and reduce waste. The absorption fridge is unique type of refrigerator that uses thermal compression as compared to the conventional mechanical compression. It uses low quality heat, such as engine exhaust heat or s ...
Applied Thermodynamics
... chamber and a gas turbine. The compressor and the gas turbine are mounted on the same shaft. The compressor unit is either centrifugal or axial flow type. The working fluid goes through the following processes: ...
... chamber and a gas turbine. The compressor and the gas turbine are mounted on the same shaft. The compressor unit is either centrifugal or axial flow type. The working fluid goes through the following processes: ...
Effect of Liquid/Vapour Maldistribution on the Performance of Plate
... Plate heat exchangers (PHE) are often applied as evaporators for industrial scale refrigeration or heat pump systems. The performance of such heat exchangers is thus important for the design and evaluation of these systems. Often, when dimensioning such heat exchangers, a lumped model with uniform f ...
... Plate heat exchangers (PHE) are often applied as evaporators for industrial scale refrigeration or heat pump systems. The performance of such heat exchangers is thus important for the design and evaluation of these systems. Often, when dimensioning such heat exchangers, a lumped model with uniform f ...
Metal foams as compact high performance heat
... arrangement using water as the coolant. Heat fluxes measured from the heater-foam interface ranged up to 688 kW m2 , which corresponded to Nusselt numbers up to 134 when calculated based on the heater-foam interface area of 1600 mm2 and a Darcian coolant flow velocity of approximately 1.4 m/s. These ...
... arrangement using water as the coolant. Heat fluxes measured from the heater-foam interface ranged up to 688 kW m2 , which corresponded to Nusselt numbers up to 134 when calculated based on the heater-foam interface area of 1600 mm2 and a Darcian coolant flow velocity of approximately 1.4 m/s. These ...
Worksheet Key - UCSB C.L.A.S.
... 5. The following reaction occurs at constant temperature and pressure. 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) a. The system does work on the surroundings and w < 0 b. The surroundings do work on the system and w < 0 c. The system does work on the surroundings and w > 0 d. The surroundings do wo ...
... 5. The following reaction occurs at constant temperature and pressure. 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) a. The system does work on the surroundings and w < 0 b. The surroundings do work on the system and w < 0 c. The system does work on the surroundings and w > 0 d. The surroundings do wo ...
What you absolutely have to know about Thermodynamics to pass
... Molecules are in constant random motion. On average “hot” objects have faster moving molecules than “cold” objects. As you can see in the graph at the right, it is possible for some of the “cold” molecules to be moving faster than the “hot” molecules. However, on average, the “hot” molecules are mov ...
... Molecules are in constant random motion. On average “hot” objects have faster moving molecules than “cold” objects. As you can see in the graph at the right, it is possible for some of the “cold” molecules to be moving faster than the “hot” molecules. However, on average, the “hot” molecules are mov ...
How to quickly cool a bottle of drink
... coefficients of both the drink and the air, as both offer resistance for the energy to get transferred as heat from the drink to the air. For the sake of brevity of this post, let us take it for granted that hdrink hair ...
... coefficients of both the drink and the air, as both offer resistance for the energy to get transferred as heat from the drink to the air. For the sake of brevity of this post, let us take it for granted that hdrink hair ...
Notes on the second law of thermodynamics
... Different levels of reversibility Note that there are two inequalities in the second law statement. The first applies to any system (dS ≥ dQ/T). The second applies to isolated systems. It is possible to have a process that is reversible for each system but is irreversible overall. To see this consid ...
... Different levels of reversibility Note that there are two inequalities in the second law statement. The first applies to any system (dS ≥ dQ/T). The second applies to isolated systems. It is possible to have a process that is reversible for each system but is irreversible overall. To see this consid ...
Fundamentals of Heat Pipes
... while evaporator temperature remains constant by pushing a noncondensable gas into the condenser when heat fluxes are low and moving the gas out of the condenser when heat fluxes are high, thereby, increasing condenser surface area. They come in various forms like excess-liquid or gas-loaded form. T ...
... while evaporator temperature remains constant by pushing a noncondensable gas into the condenser when heat fluxes are low and moving the gas out of the condenser when heat fluxes are high, thereby, increasing condenser surface area. They come in various forms like excess-liquid or gas-loaded form. T ...
SOLUTIONS: HOMEWORK #6
... 5-61 Air is accelerated in a nozzle from 30 m/s to 180 m/s. The mass flow rate, the exit temperature, and the exit area of the nozzle are to be determined. Assumptions 1 This is a steady-flow process since there is no change with time. 2 Air is an ideal gas with constant specific heats. 3 Potential ...
... 5-61 Air is accelerated in a nozzle from 30 m/s to 180 m/s. The mass flow rate, the exit temperature, and the exit area of the nozzle are to be determined. Assumptions 1 This is a steady-flow process since there is no change with time. 2 Air is an ideal gas with constant specific heats. 3 Potential ...
IEEE Transactions on Magnetics
... the rate of heat transfer. Enhancement of heat transfer can be achieved by(i) Mechanical Aids: (ii) Surface vibration: 1.2 Fuzzy Logic Fuzzy logic is a method which can be used to model the experiments, and it has been introduced for the first time in 1965 by Zadeh . Modeling of experiments can be h ...
... the rate of heat transfer. Enhancement of heat transfer can be achieved by(i) Mechanical Aids: (ii) Surface vibration: 1.2 Fuzzy Logic Fuzzy logic is a method which can be used to model the experiments, and it has been introduced for the first time in 1965 by Zadeh . Modeling of experiments can be h ...
Assignment 05 A
... 1- Calculate the kinetic energy of a 7.3-kg steel ball traveling at 18.0 m/s. a) 66 J b) 4.8 x 103 J c) 1.2 x 103 J d) 2.4 x 103 J (The kinetic energy is equal to one-half the product of the mass (in kg) and the velocity (in m/s)2.) 2- According to the first law of thermodynamics, a) the amount of w ...
... 1- Calculate the kinetic energy of a 7.3-kg steel ball traveling at 18.0 m/s. a) 66 J b) 4.8 x 103 J c) 1.2 x 103 J d) 2.4 x 103 J (The kinetic energy is equal to one-half the product of the mass (in kg) and the velocity (in m/s)2.) 2- According to the first law of thermodynamics, a) the amount of w ...
The First Law of Thermodynamics
... 360 K. The volume of the gas at point B on the PV diagram is three times that at point D and its pressure is twice that a point C. Paths AB and DC represent isothermal processes. The gas is carried through a complete cycle along the path DABCD. Determine the total work done by the gas and the heat s ...
... 360 K. The volume of the gas at point B on the PV diagram is three times that at point D and its pressure is twice that a point C. Paths AB and DC represent isothermal processes. The gas is carried through a complete cycle along the path DABCD. Determine the total work done by the gas and the heat s ...
Paper Title (use style: paper title)
... temperatures of the soil beyond a certain depth remain virtually constant. Though these variations do occur, amplitudes of fluctuations in the deep soil temperatures remain much smaller than those at the surface. So, deeper layer of the soil can be used as both – heat sink (during summer) and heat s ...
... temperatures of the soil beyond a certain depth remain virtually constant. Though these variations do occur, amplitudes of fluctuations in the deep soil temperatures remain much smaller than those at the surface. So, deeper layer of the soil can be used as both – heat sink (during summer) and heat s ...
3.1 Thermal concepts (PPT)
... with the kinetic and potential energies of the molecules, i.e. how fast the molecules are vibrating and their chemical bonds. Heat goes from objects with high temperature to low temperature, not high thermal energy to low thermal energy. For example, a massive glacier will have more total thermal en ...
... with the kinetic and potential energies of the molecules, i.e. how fast the molecules are vibrating and their chemical bonds. Heat goes from objects with high temperature to low temperature, not high thermal energy to low thermal energy. For example, a massive glacier will have more total thermal en ...
C121
... flat tube with triangular or rectangular passages of 1–2.5 mm hydraulic diameter. Still smaller passages are being applied in condenser applications, 25-mm or more wide, and length dependent on the refrigerant and operating conditions. These heat exchangers are generally employed in refrigerant-to-a ...
... flat tube with triangular or rectangular passages of 1–2.5 mm hydraulic diameter. Still smaller passages are being applied in condenser applications, 25-mm or more wide, and length dependent on the refrigerant and operating conditions. These heat exchangers are generally employed in refrigerant-to-a ...
Heat exchanger
A heat exchanger is a device used to transfer heat between one or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.