Romblon State University College of Engineering and Technology Department of Mechanical Engineering Main Campus
Romblon State University College of Engineering and Technology Department of Mechanical Engineering Main Campus
Romblon State University College of Engineering and Technology Department of Mechanical Engineering Main Campus
Submitted to:
ENGR. CHRISTIAN M. MORTEL
Submitted by:
Libaquin, Zyralyn
Mijares, Jiel
Rapada, Dexter
Relente, Ram
December 2019
APPROVAL SHEET
Approved and accepted as partial fulfillment of the requirements for the degree of BACHELOR
OF SCIENCE IN MECHANICAL ENGINEERNG
DR BISHAN F. SERVAÑEZ
Dean, College of Engineering and Technology
Date:
ACKNOWLEDGEMENT
I wished to express my profound gratitude and special appreciation to those who help
me in various ways for the completion of this design especially to the following:
To Engr. Christian M. Mortel, our instructor, who helped us unselfishly and for his
excellent advices in the field of designing an air conditioning for residential buildings.
To my parents who are always there for financial and moral support as well as
To my classmates who shared their scholastic ideas and advices in accomplishing this
design. Thank you also for being together during the time I encountered difficulties.
Above all, to almighty God who endowed us the strength, wisdom and knowledge
throughout the duration of this design and for his immeasurable love and infinite
understanding.
DEDICATION
This Air Conditioning Design of Four Storey Residential Building is heartily dedicated to our
Almighty God who has been the source of knowledge, patience, understanding and strength in
To a special feeling of gratitude to our loving parents whose words of encouragement and
push for tenacity ring in our ears that who have never failed to give us a financial and moral
support, for giving all our needs during the time we developed our system and for teaching us
even the largest task can be accomplished if it is done one step at a time.
To Engr. Christian M. Mortel, our instructor, who imparted his knowledge and thoughts to
us and for the challenges in dealing with this design for the improvement of everyone.
To our friends and classmate, who have been parts of making this work, and for serving as
CONTENT PAGE
Title Page i
Approval Sheet ii
Acknowledgement iii
Dedication iv
Table of Contents v
Introduction vi
Complete Details of Four Storey Building vii
Design Condition 1
Computation
Computation of Coefficient of Heat Transfer
Determination of Equivalent Temperature Difference
Cooling Load Calculation
Solar and Transmission Gain Walls
Solar and Transmission Roofing
Solar an Transmission Gain Except Walls
Internal Heat
Ventilation
Vapor Transmission
Infiltration
Room Sensible Heat
Outdoor Air Sensible
Effective Room Sensible Heat
Latent Heat
Room Latent Heat
Outdoor Air Latent
Effective Room Latent Heat
Effective Room Total Heat
Outdoor Air Heat Sensible
Outdoor Air Heat Latent
Outdoor Air Heat Total
Grand Total Heat
Effective Heat Sensible Factor
Dehumidified Air Quantity
Supply Air Quantity
Results of Entering and Leaving Condition Apparatus
Psychometric Chart
Air Conditioning Load Estimated Form
Designer’s Profile
INTRODUCTION
Air conditioning (often referred to as air on, AC or A/C) is the process of altering the
properties of air (primarily humidity and temperature) to favourable conditions, typically with
the aim of disturbing the conditioned air to an occupied space is to improve comfort. In the
most general sense, air conditioning can refer to any form of technology humidification, de-
humidification, heating, cooling, cleaning, ventilation, or air movement that modifies the
condition of air.
In general, the air conditioner is a device (most commonly a home appliance or automobile
system) that lowers air temperature. The cooling is most done using a refrigeration cycle, but
sometimes the evaporation is used, commonly for the comfort of cooling in buildings and
motor vehicles. In construction, a complete system of heating, ventilation and air conditioning
is referred to as “HVAC”.
Air conditioning can also be provided by the simple process called free cooling which uses
pumps to circulate a coolant (typically or a glycol mix) from a cold source, which in turn acts as
a heat sink for the energy that is removed from the cooled space. The free cooling systems can
have very high efficiencies and are sometimes combined with seasonal thermal energy storage
(STES), so that the cold of the winter can be used for summer air conditioning. Common storage
media are the deep aquifers/a natural underground rock mass accessed via heat exchanger
equipped boreholes with a cluster of small diameter. Some systems with small storage are
hybrids, using free cooling early in the season, and later employing a heat pump to cool the
circulation from the storage. During the cooling season the temperature of the storage
gradually increases, so the heat pump is added-in, thereby declining in effectiveness. Free
cooling and hybrid systems are mature technology.
The total heat required is to be removed from the space in order to bring it at the desired
temperature by the air conditioning and refrigeration known as the cooling load.
The purpose of load estimation is to determine the size of the refrigeration and air
conditioning equipment that is required to maintain inside design conditions.
The design load of air conditioning system is based on inside and outside design conditions
and its air conditioning and refrigeration equipment capacity to produce and maintain
satisfactory inside conditions.