Solar Thermal Engineering

summer term 2016/2017

E162104, 1+1, clasified assessment


Powerpoint presentations from lectures:

L0 – Solar Energy – knowledge expected for radiation (lecture from the course Alternative Energy Sources)

L1 – Solar Energy – measurement, caclulation of irradiation on inclined surface, isotropic model, anisotropic models (Hay-Davies, HDKR, Perez)

L2 – Solar Collectors – components, efficiency theory, heat output

L3 – Solar Collectors – optical characteristics, calculations

L4 – Solar storage – sensible storage (water tanks, losses, thermal stratification, volume design), latent storage (anorganic, organic PCM)

L5 – Solar Systems – design and evaluation


each student will work on design of own solar system for multifamily building and will make a report on it

each system will be designed in low-flow and high-flow alternative to compare the influence of design strategy on costs and energy performance of system


L6 – Stagnation, pipes, insulation

L7 – Pumps, safety valves, expansion vessels, heat exchangers


Solar irradiance, solar irradiation, temperature tables


Content of lectures – requirements

Solar energy – measurement of solar irradiance, data sources, split of global radiation to components (Orgill-Hollands model), diffuse radiation models (isotropic, Hay-Davies model, Hay-Davies-Reindl-Klutcher, Perez model)

Solar collectors – types, detailed balance, efficiency factor F’, efficiency of collector, heat output of collector (peak, nominal)

Solar collectors – stagnation temperature, testing, performance characteristics, incidence angle modifier

Design and evaluation of solar systems – performance characteristics of solar systems (specific solar heat gain, solar fraction, back-up energy, auxilliary energy for pumps), calculation of solar heat gain for the given system, simplified methods (monthly balance method, f-chart method), simulation programes

Solar systems – hot water, combisystem (hot water, space heating, pool water)

Calculation of hot water system for multifamily house, heat demand profile, calculation of collector area, evaluation of solar heat gains and solar fraction

Components of solar systems – heat transfer fluid, pipe, insulation, expansion vessel, safety valve

Components of solar systems – storage tanks (water, PCM), combined storage tanks (hot water and space heating), heat exchangers (tube, tube&shell, plate)

Solar cooling devices and systems – absorption, adsorption, open & closed system, energy efficiency ratio

District heating systems (decentralised, centralised), solar energy applications in industry (hot water, drying, industrial baths)


Recommended literature and links:

Deutsche Gesellschaft für Sonnenergie: Planning and Installing Solar Thermal Systems: A Guide for Installers, Architects, and Engineers, Earthscan, 2005
available online:

Felix A. Peuser, Karl-Heinz Remmers, Martin Schnauss: Solar thermal systems: successful planning and construction, Solarpraxis, 2002

Werner W. Weiss: Solar Heating Systems for Houses: A Design Handbook for Solar Combisystems, Earthscan, 2003, available online: