Assume that you have an incoming stream that contains 106 kg of wet gas (74.2 wt% methane, 15.6 wt% ethane, 5.5 wt% propane and the rest butane). The incoming stream is sent it to a separator (S1). Three streams leave the separator. Stream 2 is the top stream and contains only methane and ethane. Stream 2 contains 98% of the methane fed to the separator. Stream 3 is the middle stream and contains no butane. For every kg of methane in stream 3, there are 2.5 kg of ethane and 1.5 kg of propane. Stream 4 is the lower stream and contains only ethane, butane and propane. The mass flowrate of stream 4 is 10% of the incoming mass flowrate. Stream 4 is then sent to another separator (S2). Stream 5 leaves the top of S2 and contains 80% of the ethane and 50% of the propane entering S2 along with butane. Stream 6 leaves the bottom of S2 and contains all three components. The mass fraction of butane in stream 6 is 0.60. a. Draw and Label the diagram
b. Write equation(s) for the following statements:
1. For every kg of methane in stream 3, there are 2.5 kg of ethane and 1.5 kg of propane.
2. Stream 2 is the top stream and contains 98% of the methane fed to the separator.
3. The mass flowrate of stream 4 is 10% of the incoming mass flowrate.

c. Calculate the mass fraction of ethane in stream 2.
d. Calculate the mass of propane in stream 4.
e. Calculate the mass of butane in stream 5

El presidente del gobierno mariano y el presidente

Idon’t have classes like this sorry

Infrared sensor is most used sensor in wireless technology where remote controlling functions and detection of surrounding objects/ obstacles are involved. this post will discuss about what is infrared sensor, its working principle, how it works, types, applications, advantages and disadvantages. what is infrared sensor

ir sensor is a simple electronic device which emits and detects ir radiation in order to find out certain objects/obstacles in its range. some of its features are heat and motion sensing.

ir sensors use infrared radiation of wavelength between 0.75 to 1000µm which falls between visible and microwave regions of electromagnetic spectrum. ir region is not visible to human eyes. infrared spectrum is categorized into three regions based on its wavelength i.e. near infrared, mid infrared, far infrared.

wavelength regions of infrared spectrum

near ir – 0.75µm to 3 µm
mid ir – 3 µm to 6 µm
far ir – > 6 µm
1 introduction to infrared sensor

fig. 1 – introduction to infrared sensor

working principle of infrared sensor

infrared sensors works on three fundamental physics laws:

planck’s radiation law: any object whose temperature is not equal to absolute zero (0 kelvin) emits radiation.
stephan boltzmann law: the total energy emitted at all wavelengths by a black body is related to the absolute temperature.
wein’s displacement law: objects of different temperature emit spectra that peak at different wavelengths that is inversely proportional to temperature.
key elements of infrared detection system

the key elements of infrared detection system are:

ir transmitter

ir transmitter acts as source for ir radiation. according to plank’s radiation law, every object is a source of ir radiation at temp t above 0 kelvin. in most cases black body radiators, tungsten lamps, silicon carbide, infrared lasers, leds of infrared wavelength are used as sources.

transmission medium

as the name suggests, transmission medium provides passage for the radiation to reach from ir transmitter to ir receiver. vacuum, atmosphere and optical fibers are used as medium.

ir receiver

generally ir receivers are photo diode and photo transistors. they are capable of detecting infrared radiation. hence ir receiver is also called as ir detector. variety of receivers are available based on wavelength, voltage and package.

ir transmitter and receivers are selected with matching parameters. some of deciding specifications of receivers are photosensitivity or responsivity, noise equivalent power and detectivity.