26
S. B. Bopche
well as molten-salts. It also serves the purposes of energy storage. It may need to
remain stable or sustain temperatures up to 700 °C and must be corrosion resistant.
Higher viscosity increases the pumping power whereas higher specific heat is good
to make the systems more compact. The air is reported as a best option for heat
transfer fluid meeting all above discussed criterias.
6. Environmental impacts
It is well known that CSP systems are climate friendly. The researches in this area
and widespread of this CSP technology may fulfill household power needs in a more
effective way by capturing free and clean source of solar irradiation.
Living creatures e.g. flying birds gets burnt badly due to accidental exposure to
concentrated solar radiation beams focussing at absorber locations.
After usage, the heat transfer fluids like synthetic-oils, organic fluids, hydraulic
fluids, molten salts, lubricant as well as coolants in CSP collecting systems, exposing
it to the clean outer ambience may not be climate friendly. Better reuse/effluent practices need to be pursued in order to minimize the environmental impacts caused using
such hazardous fluids/compounds. The organo-compounds e.g., Biphenyl/Diphenyl
oxide used in CSP systems are very poisonous and inflammable also.
7. Higher capital costs
The initial cost of CSP technology based power unit is higher. The pursual of mass
production techniques, availability of sales and services in remote locations and
research innovations in heat transfer fluids, higher temperature range storage systems
and thermodynamic cycles may decrease the capital, running and maintenance cost
by around 60% in coming future.
So, it can be concluded that setting up of solar thermal power units in remotely
situated areas for a bigger capacity, say above 100 kW is problematic to maintain and
operate. In such areas, solar thermal power plant of less than or equal to 5 kW capacity
for an individual home may prove beneficial to meet the routine/daily household
needs.
Interruptions in the power supply may occur due to natural constraints like cloudy
weather, rains, heavy rainfall, heavy wind, snowfall, fall of bigger sized ice pellets that
may cause damage to the renewable energy systems, failure of solar tracking systems,
instrumentation devices. In addition to this, interruptions in electricity supply to the
accessories associated with the solar collectors may occur due to longer hours load
shedding.
The use of locally available renewable energy options e.g., solar, wind and biomass
would be extra efficient than long distance transmission of electric power for supply
to remotely located agricultural areas, in order to evolve self-sustained methods to
cope up with the crisis of fossil based fuel depletion and weather change in long run.
It leaves smaller carbon footprints behind.
The solar thermal based systems have poor solar thermal efficiency. The disadvantage associated with power transmission through longer distances is transmission
loss and towers as well as cable installation cost. For such circumstances, erection
S. B. Bopche
well as molten-salts. It also serves the purposes of energy storage. It may need to
remain stable or sustain temperatures up to 700 °C and must be corrosion resistant.
Higher viscosity increases the pumping power whereas higher specific heat is good
to make the systems more compact. The air is reported as a best option for heat
transfer fluid meeting all above discussed criterias.
6. Environmental impacts
It is well known that CSP systems are climate friendly. The researches in this area
and widespread of this CSP technology may fulfill household power needs in a more
effective way by capturing free and clean source of solar irradiation.
Living creatures e.g. flying birds gets burnt badly due to accidental exposure to
concentrated solar radiation beams focussing at absorber locations.
After usage, the heat transfer fluids like synthetic-oils, organic fluids, hydraulic
fluids, molten salts, lubricant as well as coolants in CSP collecting systems, exposing
it to the clean outer ambience may not be climate friendly. Better reuse/effluent practices need to be pursued in order to minimize the environmental impacts caused using
such hazardous fluids/compounds. The organo-compounds e.g., Biphenyl/Diphenyl
oxide used in CSP systems are very poisonous and inflammable also.
7. Higher capital costs
The initial cost of CSP technology based power unit is higher. The pursual of mass
production techniques, availability of sales and services in remote locations and
research innovations in heat transfer fluids, higher temperature range storage systems
and thermodynamic cycles may decrease the capital, running and maintenance cost
by around 60% in coming future.
So, it can be concluded that setting up of solar thermal power units in remotely
situated areas for a bigger capacity, say above 100 kW is problematic to maintain and
operate. In such areas, solar thermal power plant of less than or equal to 5 kW capacity
for an individual home may prove beneficial to meet the routine/daily household
needs.
Interruptions in the power supply may occur due to natural constraints like cloudy
weather, rains, heavy rainfall, heavy wind, snowfall, fall of bigger sized ice pellets that
may cause damage to the renewable energy systems, failure of solar tracking systems,
instrumentation devices. In addition to this, interruptions in electricity supply to the
accessories associated with the solar collectors may occur due to longer hours load
shedding.
The use of locally available renewable energy options e.g., solar, wind and biomass
would be extra efficient than long distance transmission of electric power for supply
to remotely located agricultural areas, in order to evolve self-sustained methods to
cope up with the crisis of fossil based fuel depletion and weather change in long run.
It leaves smaller carbon footprints behind.
The solar thermal based systems have poor solar thermal efficiency. The disadvantage associated with power transmission through longer distances is transmission
loss and towers as well as cable installation cost. For such circumstances, erection