Question

A new constructed plenary hall with total floor dimension of 51 meters long and 42 meters wide which can conveniently accommodates 3,500 people is to be decided on its illumination. The required illumination is 350 lux and given the option to choose either fluorescent T8 or high pressure sodium lamps for its entire lightings. Table 3 shows the specifications of the lamps available. Sebuah dewan persidangan baru yang dalam pembinaan dengan jumlah ukuran lantal 51 meter panjang dan 42 meter lebar yang mampu memuatkan 3,500 orang sedang dirancang pencahayaannya Keperluan pecahayaannya adalah 350 hx dan diberi pilihan samada memilth samada lampu pendafiour T8 atau lampu sodium bertekanan tinggi wntuk pencahayaan keseluruhan Jadual 3 menunjukkan spesifikasi lampu-lampu yang tersedia (a) Note: TNB tariff is RM 0.37/kWh. [Nota: Tartf TNB adalah RM 0.37/kwh Table 3 Jadual 3 High Pressure Sodium Lamp Fluorescent T8 Lamp 70 18 Wattage (W) 80 75 Efficiency (Im/Watt) 30,000 20,000 Lamp life hours 5,400 1,350 Output (Lumens) 55 32 Price/unit (RM) Determine the quantities and the total cost of fluorescent and high pressure sodium lamps if one of the types is chosen to be installed in the hall. [Tentukan bilangan dan jumlah harga lampu pendaflour dan lampu sodhum bertekanan tinggi Jika salah satu jenis tersebut dipilih untuk dipasang dalam dewan berkenaan (7 Marks/Markah) ..7- SULIT Dicesak olek Unir Peperiksan & Peguanahan Bahagian Pengurann Akadenit Jabatan Pendator SULIT (EET432) -7- Compare the total energy used in one day for 12 hours operation and its (i) electricity cost in one month if the hall is being used on average of 22 days in a month for each type of lamps. Then estimate the number of years the fluorescent and high pressure sodium lamps need to be replaced.

Answer 1

61x4 m AeveR 2142m2 arr Requiredlumiman ca ormuda A - Area o the E 356 u no The : Aumen ouput eac Romp A fr T8 lamp, n x 1350 350 2142 35.DX 2142 Rompe naquin 555. 33 556 n 13 50 (32x556 RM 17792 . Cost RM gh resisere odim vapour komp, nx5400 21 42 350 350 2142 540D lamps 3 8 83 139 RM3x 139) RM 7645 pressure ium vapour fonup lers Cost meeds So lomp: T8 75 im/wat each Ausmen 3 50 Lnmen Raumen lamp amp watage .Tola omp watage 2ach 41 1350 wat- t&bat 75 each M 81 X 95G Sotal enera Consumed in i month, ID 008 x 12 X22 ewhr 2 642.i2 kwhr Lamp ie hours 20,000 hrs Total / hours/year 4 month month 12 x 22 our Tohat b hour in Year

o Years after wheh kamp meeds to be ruplaced ou 6.3 13 years years Years 12X22 X |2 lamp orngh freasuneSodium ap 8 o Lumen att 5400 lumen Ramp Lumen each 17 540D 67.5 Watt watt Rocn 80 hgh pressure dium vabour lamp . Total oattage Total enery Comsumption m mom, Total 139 X6.5KW 9.382 5 kw 9.38 25 12 X 22 Kwhr 24t6.98 Kwhy kamp ife how Total buning hours n previous 30, Doo hrs year lame lomp Sa me T8 needs to be n0 GYears al whiuh eplaced 30,00 D ears 9.469 6 yeas years 12X 22X12 Lo, Sodium vapour amp Comparison to T8 Consumes Xess