HVAC System Design and Analysis: Sentra Supercity Rajagiriya Case

This case study examines the Heating, Ventilation, and Air Conditioning (HVAC) system design and implementation for the Sentra Supercity project in Rajagiriya. It includes a detailed comparison of power consumption between a Water Cooled Package system and a VRF (Variable Refrigerant Flow) system, highlighting potential energy savings. The analysis covers various aspects such as cooling load calculations, equipment selection, and project execution, providing insights into the design considerations and efficiency improvements achieved in the project. The document also provides a resume, highlighting the experience of a Mechanical Engineer involved in HVAC projects, showcasing their skills in system design, project management, and value engineering. This assignment is available on Desklib, where students can find a wealth of study resources including solved assignments and past papers.

Career Resume
Personal Details
Name: Lenin Fernando
Nationality: Please fill
E-mail: [e-mail]
Mobile: [phone]
Date of Birth: Please fill
Address: 25 Lilyturf Drive, Tarneit, VIC 3029, Australia
Marital Status: Please fill
Career Conspectus
To secure a position in the field of Heating Ventilation Air Conditioning & Refrigeration that
would enable me to utilize my skills in engineering and management knowledge while
applying my desire for independent work that displays my creativity for innovation and
deliver projects to highest quality standards adhering to health, safety and environmental
aspects.
Educational Qualification
Serial No. Examination School/University Year of
Passing
Percentage
1. B. Sc in Mechanical
and Manufacturing
Engineering
University of
Ruhuna, Sri Lanka
Please fill Please fill
Work Experience
Duration Position Company Responsibilities
July 2018
to Present
Project
Coordinator
Epsicon (Pty)
Ltd, Australia. –
Contractor for
NBN Project
 Leading work force for Installation of
Pit, Trenching works and Cable
hauling works to meet the compliance
and deadlines.
 Obtaining DBYD plans, As built
drawings, Identifying existing services
by means of the Service Locator,
hence obtaining approval for the

execution works.
 Concluding solutions for onsite
problems, ensuring health and safe
working environment and coordinating
with main contractor.
 Material procurement and using
efficient managerial techniques for
consumables.
 Preparing Inspection reports and
handing over documents and attending
to monthly progress meetings with
main contractor.
 Preparing progress reports.
Septembe
r 2015 to
July 2018
Mechanical
Engineer(H
VAC)
Abans
Engineering
(PVT) Ltd, Sri
Lanka. - Sole
Authorized
Agent for
TRANE
Equipment &
MITSUBISHI
ELECTRIC
VRF Systems
 Leading project teams for Air
Conditioning and Ventilation System
installations.
 Site inspection based on job inquiries,
designing of energy efficient and
appropriate HVAC System and
preparing estimation.
 Leading draftsman to prepare
construction and coordination drawing
based on Architectural drawing.
 Preparation of technical submissions,
project plan and project cost summary.
 Material procurement.
 Preparing project plans and coordinate
with both internal and external project
stakeholders, including sub-contractors
and consultants to meet compliance
and deadlines.
 Ensuring that the most energy efficient
and reliable design is achieved in terms
of the Air conditioning system
perspective.
 Project management from the technical
division perspective & supervision of
HVAC system installations from the
point of sale to the point of
commissioning which includes,
Purchasing, Procurement, Site
management, Contractor management
and Running multiple projects
simultaneously.
Novembe
r 2012 to
August
2015
Mechanical
Engineer
(MEP)
Shin Nippon
Lanka (PVT)
Ltd
 Preparing project plans and coordinate
with both internal and external project
stakeholders, including sub-contractors
and consultants to meet compliance

and deadlines.
 Designing and carrying out value
engineering works and technical
review, material procurement and
Testing and Commissioning of
following Systems: Air Conditioning
and Ventilation System, Plumbing &
Hot Water generation system, Fire
Protection system, Sewer and Waste
water Drainage System and Swimming
Pool System.
Septembe
r 2010 to
October
2012
Mechanical
Engineer
(HVAC)
Metropolitan
Air
Conditioning &
Refrigeration
(PVT) Ltd. Sole
Authorized
Agent of YORK
equipment in Sri
Lanka
 Leading project teams for Air
Conditioning and Ventilation System
installations.
 Site inspection based on job inquiries,
designing of energy efficient and
appropriate HVAC System and
preparing estimation.
 Leading draftsman to prepare
construction and coordination drawing
based on Architectural drawing.
 Preparation of technical submissions,
project plan and project cost summary.
 Material procurement.
 Prepare project plans and coordinate
with both internal and external project
stakeholders, including sub-contractors
and consultants to meet compliance
and deadlines.
 Ensuring that the most energy efficient
and reliable design is achieved in terms
of the Air conditioning system
perspective.
 Project management from the technical
division perspective & supervision of
HVAC system installations from the
point of sale to the point of
commissioning which includes,
Purchasing, Procurement, Site
management, Contractor management
and Running multiple projects
simultaneously.
Professional Attributes
 Design of Heating Ventilation and Air Conditioning Systems: Strong hands on
technical experience in designing of Air Conditioning systems, Ventilation systems,
Sizing & Installation of Ducting and Piping works.

 Project Management Skills: Contract management, managing stakeholders to bring
customised projects to success, effective time management, and budgeting, planning,
forecasting, variance analysis and field supervision.
 Communication Skills: Able to effectively liaise with people of different levels and
preparation of engineering and financial reports intended for various audiences.
 Team Work: Creating a knowledge sharing culture through collaboration, motivate
and lead by example in order to bring projects to success.
 Manage multiple projects and work effectively during times of pressure: Able to
prioritize tasks well and manage expectations of all stakeholders while paying
attention to detail.
Major Projects in Shin Nippon Lanka (PVT) Ltd.
 Execution and Value engineering works for 5 Star Rating Hotel with 129 Guest rooms
with a Total project estimated value of USD 38.0M.
 Design, Execution and Value engineering works for 16 Storied City Hotel with a
Total project estimated value of USD 25.6M.
Major Projects in Metropolitan Air Conditioning & Refrigeration (PVT) Ltd.
 Execution and Value engineering works for the memorial lecture hall at Defence
university with a Water-Cooled Chiller with Total project estimated value of USD
11.0M.
 Design, Execution and Value engineering works for Unilever Sri Lanka factory with a
Total project estimated value of USD 8.6M
Selected Accomplishments
 Knowledge on international HVAC standards and capability to lead – 2017:
Sentra Supercity (7 Storied Office Complex) – Colombo Sri Lanka – Design and
Execution the project with estimated value of USD 15.0M; Negotiating to a closure,
execution of installation and commissioning, managing both technically and
commercially. The most energy efficient design was achieved after analyzing the
requirement of the customer and adopting the latest technologies available.
 Problem solving and technical adaptability – 2016: Designing and Installation of a
system to Combine of TRANE AHU with MITSUBISHI ELECTRIC VRF
Condensing Unit (use of External Expansion Kit) - First such system in Sri Lanka.
 Project Management – 2016: Installation and commissioning of Water-Cooled
Chiller System with TRANE Equipment with the capacity of 200RT. I was
recognized by the company as the outstanding young engineer for the way the project
was managed and commissioned.
Technical Attributes
 Advance skills in AUTO CAD, MS Projects and TRACE 700.
 Advance industrial experience in equipment selection with Trane Official Product
Selection System (TOPPS), YORK Equipment Selection tools and Mitsubishi Electric
VRF System (CITY MULTI).
 Advance industrial experience in Pump sizing, Pipe sizing and Duct sizing tools.
 Advance industrial experience in Central Air-Conditioning Systems, Building
Management Systems, Plumbing Systems, Fire Protection System, Sewer and Water
Treatment and Swimming Pool Systems.

 Experience in asset management, energy management and energy efficiency
practices.
Charity and Voluntary Work
 2009: Shin Nippon Lanka (PVT) Ltd. – Training Engineer (HVAC).
 2010: Sri Lanka Ports Authority – Training Engineer.
 2011: Society of Mechanical and Manufacturing Engineers, University of Ruhuna –
Member.
Declaration:
I, the undersigned, hereby declare that information furnished above is true, correct &
complete to the best of my knowledge.
Date: Signature
(LENIN FERNANDO)