Question 4 (a) A small factory has an electricity demand profile for a given day as shown in Table Q4.a.(i) below. (i) Tariff Band kWh used (iii) A B C 250 1000 500 Table Q4.a.(i) Calculate the total electricity charge for this day at a flat tariff of £0.14 per kWh. (ii) Recalculate the total electricity charge for that day if a Time of Use tariff as shown in Table Q4.a.(ii) is applied instead. Tariff band A B C £/kWh 0.08 0.24 0.14 Table Q4.a.(ii) Suggest an alternative demand profile which will reduce the charge for the same total demand to an amount less than or equal to the original tariff. The demand during period B must be no less than 400 kWh, and all time periods must be non- zero. All calculations must be shown to justify your alternative profile.
Question 4 (a) A small factory has an electricity demand profile for a given day as shown in Table Q4.a.(i) below. (i) Tariff Band kWh used (iii) A B C 250 1000 500 Table Q4.a.(i) Calculate the total electricity charge for this day at a flat tariff of £0.14 per kWh. (ii) Recalculate the total electricity charge for that day if a Time of Use tariff as shown in Table Q4.a.(ii) is applied instead. Tariff band A B C £/kWh 0.08 0.24 0.14 Table Q4.a.(ii) Suggest an alternative demand profile which will reduce the charge for the same total demand to an amount less than or equal to the original tariff. The demand during period B must be no less than 400 kWh, and all time periods must be non- zero. All calculations must be shown to justify your alternative profile.
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 6RQ
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Transcribed Image Text:Question 4
(a) A small factory has an electricity demand profile for a given day as
shown in Table Q4.a.(i) below.
Tariff Band
A
B
C
kWh used
250 1000 500
(i)
Table Q4.a.(i)
Calculate the total electricity charge for this day at a flat tariff
of £0.14 per kWh.
(ii) Recalculate the total electricity charge for that day if a Time of
Use tariff as shown in Table Q4.a.(ii) is applied instead.
(iii)
Tariff band
A
B
C
£/kWh
0.08
0.24
0.14
Table Q4.a.(ii)
Suggest an alternative demand profile which will reduce the
charge for the same total demand to an amount less than or
equal to the original tariff. The demand during period B must
be no less than 400 kWh, and all time periods must be non-
zero. All calculations must be shown to justify your alternative
profile.
(b) With particular reference to the benefits for the Network operators,
discuss the anticipated functionality of the smart meter which will
support the smart grid of the future.
(c) Calculate the energy stored in a modern thin-rim type flywheel which
has a mass of 2,000 kg, a diameter of 560 mm and is rotating at
17,400 r/min.
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