Answered step by step
Verified Expert Solution
Question
1 Approved Answer
Exercise 3 In the refrigerator laboratory of a testing institute, a climatic chamber is operated in water energy consumption measurements are carried out on refrigerators.
Exercise
In the refrigerator laboratory of a testing institute, a climatic chamber is operated in water
energy consumption measurements are carried out on refrigerators. In order to maintain the
conditions required for a socalled standard energy consumption measurement, a temperature
of and a relative humidity of must be kept constant at a height next
the appliances see sketch The climatic chamber is perfectly insulated except for the flow
through which a constant heat flux escapes, since the climatic chamber
located in the basement and the floor has a temperature of During a running
measurement, there are refrigerator cooling units in the chamber, each of which emit
an average heat flux of to the chamber air. The chamber air conditioning system
sucks in air to be conditioned near the floor, which has cooled to a temperature of
due to heat loss via the chamber floor. Of the intake air mass flow, is replaced by free
air, which on a summer day has a temperature of and a relative humidity of
Subsequently, the mixed air is cooled in a heat exchanger by a tempered brine, with
temperature of The water condensed out of the air during cooling is completly
separated. Subsequent to the dehumidification process a downstream heater finally brings the
air to the required inlet temperature of supplying the heat flow
Calculate the mass flow of dry air so that
constante temperature condition are maintained in the
climatic chamber?
calculate the temperature and relative humidity
after mixing the air steams?
calculate the temperature the air must be cooled
to be dehumidification?
calculate the heat flux Qwu absorbed by Brine
in the heat exchanger to cool the air down to
the dehumidification temperature which
mas flow rate must be removed when
dehumidifyning the air?
catculate the heat flow of the heater QHeating
by which the air is bought to the inlet
temperature after dehumidification Material data:
all changes of state of humid are performed
at bar
specific isobaric heat capacities:
Specific gas constants:
Enthalpy of Vaporization of water at
Vapor pressure curve of water:
with in and bar
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started