W = Q(T1/T2 - 1) { T1 = 273 + 40 , T 2 = 20 +273 , Q is heat transfer and W is amount of hea required}
W = 2000( 312/293 -1 )
W = 130 J
A Carnot air conditioner operates between an indoor temperature of 20degreeC and an outdoor temperature of...
The temperatures indoors and outdoors are 299 and 312 K, respectively. A Carnot air conditioner deposits 6.88 x 105 J of heat outdoors. How much heat is removed from the house?
A certain heat pump operates on a reverse Carnot cycle, heating the interior of a house to 26 degrees C, while the exterior temperature is -2 degrees C. a) What is the coefficient of performance for this heat pump? b) If the house loses 100 kJ per hour to the exterior, how much power is required to run the heat pump?
A heat engine operates in a Carnot cycle between 86.0°C and 345°C. It absorbs 20,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 5.00 s. (a) What is the mechanical power output of this engine? (b) How much energy does it expel in each cycle by heat?
A house has an indoor temperature of 336 K while the outdoor temperature is 280 K. If there is a steady heat transfer rate of 1,855 W through a window of the house, what is the rate of entropy generation in this process in W/K?
e-Lecture uestion 02 The temperatures indoors and outdoors are 299 and 312 K, respectively. A Carnot air conditioner deposits 9.76 x 105 J of heat outdoors. How much heat is removed from the house? estion 05
An air conditioner is used to maintain a house at 400C when the temperature outside is 850C. The house gains heat through the walls and the windows at a rate of 2130kJ/kg/min, and heat generation rate within the house from people, lights and appliances amounts to 120kJ/min. Determine the minimum power required for the air conditioner and cost of its operation over a three month summer at a rate of $0.15Kw Hr.
Consider a typical residential heat pump system operating between an indoor temperature of 70F and an outdoor temperature of 45F. The Carnot COP of heating for this system is over 30 (you can determine this exactly). Yet, the actual COP of heating for actual systems today runs around 4-5. Ok, where did the COP go? That is, in thermodynamic terms- what are the irreversibilities, what components or processes are guilty? Don't forget the whole system should include some power hungry...
A 653 W Carnot engine operates between constant-temperature reservoirs at 133°C and 63.8°C. What is the rate at which energy is (a) taken in by the engine as heat and (b) exhausted by the engine as heat?
62. A Carnot engine operates between the temperatures Th = 1.00 x 102° C and Te 20.0° C. By what factor does the theoretical efficiency increase if the temperature of the hot reservoir is increased to 5.50 x 102 C? A Carnot engine operates betwe en 100° C and 20°C. How much ice can the engine melt 64. V from its exhaust after it has done 5.0 x 104 J of work?
(a) During each cycle, a Carnot engine absorbs 772 J as heat from a high-temperature reservoir at 388 K, with the low-temperature reservoir at 287 K. How much work is done per cycle? (b) The engine is then made to work in reverse to function as a Carnot refrigerator between those same two reservoirs. During each cycle, how much work is required to remove 1206 J as heat from the low-temperature reservoir? () Numbel 200.9590 UnitsT j UnitsT j (b)...