An air-standard dual cycle has a compression ratio of 9.1 and displacement of vd = 2.2 l. at the beginning of compression, p1 = 95 kpa, and t1 = 290 k. the heat addition is 5 kj, with one quarter added at constant volume and the rest added at constant pressure.

determine:

a) each of the unknown temperatures at the various states, in k.
b) the net work of the cycle, in kj.
c) the power developed at 3000 cycles per minute, in kw.
d) the thermal efficiency. e) the mean effective pressure, in kpa.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?

Apure substance is a)-mixture of various chemical elements or compounds b)-substance that has a fixed chemical composition throughout c)-mixture that is homogeneous (such as air) d)-all the answers