Question

Question 1 Discuss, using diagrams where appropriate, how the annual domestic thermal load is calculated and how the heating and cooling loads can differ between countries. Total 10 marks. Question 2 Discuss the international standards relevant to conducting an LCA Total 10 marks. Question 3 Using an appropriate example discuss battery selection, performance and setup in PV systems. Total 10 marks. Question 4 Providing relevant numerical data, discuss some of the ways in which hydropower systems can be categorised Total 10 marks. Question 5 Discuss (using diagrams where appropriate) possible generators modes of operation and how this effects the generator speed.

Answer 1

ANNUAL DOMESTIC THERMAL LOAD The thermal ii analyzed location and load based Os weather % building the data. about (1). Collect location building about (11) Estimate Athuitwu windows, exe) building dimension, fles Calculate all the required specifications such as Total interior space Total exterior wall Total Hoof area Total wind Iw area area

Stoof stesistance Le people Total number Total Total resistance for wall Total resistance "fole windows. (111) Nexy calculate the ave loads. ir 1 w In Hummel air cooled and humidity ů removed while in winter aur is healed and humidity will be added. * Dala required calculating the thermal placed Areas envelopes and glass U-factors fou the envelopes between inside and outside o Glass transmission factory Lighting density and related pluches load of a o 47 0

Week - 21 • Number of persons Ventilation rate Air inside and outside Equation for cool cooling lead Heat transferred AUAT through solid envelopes Temp: difference [CCLTD+LM) x + (7-1R) + JE AT lod) (To-Ta Outside T = To ATme

mren) Coa (mint Sensible heat gain from infilteration and ventilation (76-7 Note Sensible heat gaine foom occupánk Latent heat NpHL gain from ocupante Supply Air asta quantity T

[IN Energy Enesegy Analysis is also Ewe Ts1-15 Too--db 'SI-06 Istab Tss SI-iub Ев Tso-db Torah Tsi-ah Tsi-dp HEALING AND COOLING LOAD DIEFER BETWEEN COUNTRIES This Ollwul due to variation in their agit itudes and lattitudes. The owentatim of the Sunlight cliffera This affects the temperatuul on heating and cool and also the o number hot and cold days and