Ingenieur Vol 71 ingenieur July 2017 | Page 16

INGENIEUR Energy Saving Measures The recommended energy saving measures, ‘with cost’ and ‘without cost’, are in the two tables below. The BEI readings of Ministry of Works Complex has decreased since the year 2016 after the cost saving measures were made during the year. In 2017, some cost saving proposals are being made including the electrical scope of items 1 to 3 and the mechanical scope of items 1 to 3. Provision of these retrofit works has been funded by the Ministry of Energy, Green Technology and Water (KeTTHA) at a cost of RM5.86 million.  1) ENERGY SAVING MEASURES WITHOUT COST No. RECOMMENDED ESTIMATED YEARLY ESTIMATED ANNUAL ENERGY MEASURES SAVING (kWh) SAVINGS (RM) THE SCOPE OF ELECTRICITY 1 Reduce the load in the evening in block A 38,016.00 13,875.84 2 Reduce the load in the evening in block B 31,680.00 11,563.20 3 Switch off lights and equipment domestic at lunch 12,672.00 4,625.28 hour for 1 hour in block A 4 Switch off lights and equipment domestic at lunch 28,512.00 10,406.88 hour for 1 hour in block A THE SCOPE OF MECHANICAL 1 Closing doors and windows to prevent the infiltration 40,603.20 14,820.17 of external air to air conditioned space 2 Reduction of operating hours of the air conditioning 369,132.72 134,733.44 from 11 hours to 10 hours 3 Do water-balancing and coordinating the 40,603.20 14,820.17 temperature to 24 º C at each work space 4 Allow only 2 elevators (for block A and B) on standby 12,472.20 4,552.35 during off-hours and holidays compared with 12 elevators during office hours currently. It is estimated that 65% of energy consumed can be saved. TOTAL 573,691.32 209,397.33 2) ENERGY SAVING MEASURES WITH COST No. RECOMMENDED ESTIMATED YEARLY ESTIMATED ANNUAL ENERGY MEASURES SAVINGS (kWh) SAVINGS (RM) THE SCOPE OF ELECTRICITY 1 Fix timer switches in the parking area in block A 8,383.00 3,059.62 2 Put switch lighting controls in each room at block A 10,644.48 3,885.24 and B 3 Put switch lighting controls in the parking area 39,783.74 14,521.07 THE SCOPE OF MECHANICAL 1 Chiller replacement at block A and B that complies 1,396,048.90 145,826.30 with the Minimum requirements of MS1525:2014 2 Replacement motor for the chilled water pump for 5,169.12 1,886.73 blocks A and B 3 Replacement of the condenser water pump for 12,801.36 4,672.49 blocks A and B 4 Fan motor replacement AHU for blocks A and B 19,489.22 7,113.57 TOTAL 1,492,339.82 180,965.02 6 14 VOL - SEPTEMBER 2017 VOL 71 55 JULY JUNE 2013