Designing of Heating, Ventilation, and Air Conditioning (HVAC) System for Workshop Building in Hot and Humid Climatic Zone Using CLTD Method and HAP Analysis: A Comparison

• Published in: Arabian journal for science and engineering (2011) 2022-07, Vol.47 (7), p.9019-9041
• Main Authors: Nadeem, Talha Bin, Ahmed, Ahsan, Naqvi, Asad A., Saad, Muhammad, Abbasi, Azan Ali, Arshad, Syed Muhammad Usama, Ahmed, Farooq
• Format: Article
• Language: English
• Subjects: Air conditioners; Air conditioning; Cooling; Cooling loads; Electrical loads; Energy consumption; Engineering; Equivalence; Heating; Humanities and Social Sciences; HVAC; HVAC equipment; Indoor air quality; Maintenance costs; multidisciplinary; Power plants; Research Article-Mechanical Engineering; Science; Software; Ventilation; Workshops
• ISSN: 2193-567X; 1319-8025; 2191-4281
• DOI: 10.1007/s13369-021-06428-3

In recent times, global warming and climatic changes have caused significant increase in ambient temperatures, making heating, ventilation and air conditioning (HVAC) a necessity. The core purpose of HVAC is to provide comfortable environment to the occupants of a building. Central air conditioning is more reliable for easy operation with a lower maintenance cost. The main aim of this study is to design the most accurate HVAC system as per actual design requirement, for a workshop building of a power plant located in Karachi, Pakistan. HVAC systems accounts for 60% of the total electrical load requirements of a building; hence, an accurately designed HVAC system will be highly cost and energy efficient. The workshop building consists of two floors to be conditioned. All-Air variable volume system is used to design the HVAC system for the building. Two approaches are employed to achieve the objective of this study. First, cooling load temperature difference (CLTD) method and second, hourly analysis program (HAP) software. The cooling load obtained from CLTD method is 190.7 kW, equivalent to 54.25 tons of refrigeration (TR). Similarly, cooling load determined using HAP software is 195.2 kW, equivalent of 55.5 TR. The variations in cooling loads obtained from these methods are about 2% only, which is significantly lower in comparison with the available literature. This study will help engineers to design cost-effective HVAC system which is neither oversized nor undersized which will also reduce the energy consumption of building.