Question 1
An energy audit was conducted for water-cooled chiller air-conditioning system. Illustrate the following SIX (6) profile graphs using the raw data collected in ANNEX A. Describe each individual graph.
(a) Cooling Load Profiles
(b) Chiller Plant Efficiency Profile
(c) Heat Balance Profile
(d) Chiller Power versus time
(e) Chilled water temperature different versus time
(f) Condenser water temperature different versus time
(60 marks)

Question 2
As per current industrial practice, an energy audit report shall include the following information. Set up the following FOUR (4) charts with appropriate statistics using the raw data collected in ANNEX A. Recommend to improve the system efficiency of the water-cooled chiller air-conditioning system.
(a) Frequency of Cooling Load Occurrences (Bin interval of 20)
(b) Chiller Plant Efficiency vs Cooling Load Profile
(c) Tabulate the summary of the chilled water plant performance
(d) Tabulate the heat balance summary.