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Table 4: Basic Principles of Solar Power and Heat

System Solar Power Solar Thermal
Picture

Energy Electricity Heat/Hot water

Applicatio Power supply for any application Heat or hot water applications (e.g. laundry,
n shower, kitchen appliances, heating systems,
pool heating, wellness and spa facilities).

Generatin Photovoltaic module (solar/PV cells). Solar collector (solar absorber).
g Technologies
Polycrystalline modules; Flat plate collector; Evacuated tube collector;
Types of Swimming pool absorber.
Generators Monocrystalline modules; Thin-film
Sun radiation heats up the water running
Working modules through the solar collectors, which generate
Principle heat.
Solar cells absorb sun radiation and
How to A glazed box with black or blue flat plate
Identify release electrons that generate collectors or glass tubes connected to a
electricity, if connected to an electric manifold.
circle.

Thin panels with a shiny surface in
either blue or brown.

Efficiency The solar panels have an efficiency The solar thermal collectors have an

rate between 15-20% depending on efficiency rate of up to 50%, depending on the
temperature of the hot water, the quality of the
the module type and installation
components as well as the installation and
conditions(e.g. location, inclination, location of the system.
orientation(

Interface Inverters Not applicable
to Hotel
The solar power system is connected The solar thermal system is connected to the
Connectio to either the mains or sub-distribution hot water system of the hotel.
n Point board of the hotel.

Storage Batteries Hot water storage tank

Back-up / Public grid or generator Boiler or electric heaters
Supplementary

Energy

Connectio Wiring Piping with insulation
n
Source: Karina et al., (2018).

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