Computer simulation and optimisation of solar heating systems for Cyprus
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This thesis reports the results of research into the modelling and simulation of solar
water and space heating for Cyprus, and the investigation of the factors concerning
the optimisation of such systems. Further a number of design criteria, which can be
used by consultants and designers of solar heating systems, have been established.
Five solar heating system configurations have been modelled using the component
models of the TRNSYS programme. They concern thermosyphon solar water heating
systems, active solar water heating systems, solar space heating systems, combined
solar water and space heating systems and solar assisted heat pump systems for space
and water heating. These models are used to simulate the thermal performance of
the systems and investigate their cost effectiveness under the weather and
socioeconomic conditions of Cyprus. The results of the simulations have been used
to identify the optimum design criteria for such systems in the Cyprus environment.
The design criteria that have been established are concerned mainly with the solar
collector and the storage tank and they are key design factors for a solar heating
system. The design factors include the collector orientation and tilt angle, the
collector to load factor which relates the collector surface area to the annual thermal
load, the storage factor which relates the capacity of the storage tank to the collector
size, the collector water flow flux, which relates the water flow rate through the
collector with the collector area, and other criteria, which concern the auxiliary heat
supply and the heat exchangers.
For space heating systems, in addition to the above factors, a new design criterion is
introduced, the collector to floor area factor, which relates the collector area to the
building floor area, while for domestic hot water systems, the collector to consumer
factor is used to specify the collector surface area needed for each hot water
consumer in the building.
This work has resulted in the publication of four papers in refereed International
Journals and the presentation of three other papers at International Conferences. A
list of publications is included in the Appendices.