Evaporative Cooling and Geothermal Cooling Techniques

UNIVERSITY AFFILIATION
FACULTY OR DEPARTMENT
COURSE ID & NAME
TITLE: TECHNICAL WRITING ASSIGNMENT
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PROFESSOR (TUTOR)
DATE OF SUBMISSION
2018

INTRODUCTION
Cooling potential of evaporate cooling.
The evaporate cooling is a technique applied in most agricultural applications such as the green
house farming systems and the poultry farming systems (Czaric, & Fairchild, 2003, p.4). The
systems work to ensure that during seasons such as the summer, the room temperature in the
residentials is set to the required conditions. The evaporate cooling technique is good as it is
economically feasible for residential and industrial implementation. Some countries such as India
and the United States especially during summer season, utilize the evaporate cooling. In such
places, a lot of evaporation occurs and as such the wet surfaces keep losing water to evaporation.
The systems can be implemented based on a number of principle such as the direct evaporation
process, indirect evaporation process and a hybrid of the direct and indirect evaporation
process(Czaric, & Fairchild, 2009, p.4). The amount of air supplied is given in an energy balance
equation in a conditioned space such that,
ms = Qt
ht−hs
, Qt is thetotal heat transfer rate−sensible∧latent heat
The evaporate systems are quite prevalent in the current applications whereby there are lower
equipment and installation costs hence it is economically feasible to implement. It is easy to
manufacture and has relatively low maintenance costs. The system is environment friendly in
that it does not release harmful chemicals to the environment or the atmosphere during its
operation. It ensures that there is proper air circulation in an enclosed area regulating the
temperature and humidity in the conditioned space. The system is not effective for areas where
low humidity is required. The system tends to cool all the water that evaporates from the wet
surfaces without regulating the extent of cooling. Unfortunately, the water that is cooled may
lead to health problems that are caused by micro-organisms for the clean or wetted surfaces
which may not have been properly maintained.
To employ the energy balance equation in the given
METHODOLOGY
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Qs =ms Cpm ( ts−ti )
Qi=ms hfg ( ws −wi )
The equation uses the mass flow rate of the supply air alongside the specific heat of air and the
latent heat of vaporization of water. The supply and return air humidity ratios as well as the
supply and return temperatures of air. For the direct evaporate cooling, it is discussed that the
lowest temperature attainable is the wet bulb temperature (Donald & Simpson, 2000, p.4). The
wet bulb temperature is said to be proportional to the outdoor air. For this technique, only the
2