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SSH MEP team member Imran Shaikh, recently reviewed and updated the ASHRAE eLearning course, ‘Load Calculations’. He added a new chapter to the course, focusing on calculating residential heat load by using fundamental principles. His aim is to help engineers fully understand, rely on and once again use these principles instead of bargaining on software programs to churn out the results.
As case study, Imran uses a UAE villa to explain the parameters for accurate system selection: Accurate heating and cooling load calculation form an important part of the design process as it provides a firm bridge between fundamental building design decisions and an operating building. Accurate load estimates help determine proper equipment capacity. Excessive safety factors in the design should be avoided, and rational thinking needs to be applied in the calculations while applying design parameters and standards. Designers and contractors must ensure that air conditioning units, such as FCUs and AHUs, are correctly sized. Oversized equipment results in poor de-humidification as it supplies more air to the space than required, thus operating at a higher off-coil temperature to meet the sensible cooling demand of the space. This, in turn, results in increased humidity in the space and can result in condensation which facilitates mold/mildew formation. The latter leads to poor indoor air quality that can become hazardous for occupants, often leading to upper respiratory infections and/or illnesses. These issues are frequently found in spaces such as hotel rooms and residential apartments where the sensible load is predominant.
Based on the high-quality content he produced, ASHRAE invited Imran as featured author for the course to be launched worldwide on 30th June 2020. This achievement not only demonstrates Imran’s sheer commitment to the profession, but also validates the breadth of expertise and knowledge that the SSH MEP team offers all our clients.