**Nomenclature**


*Solar Energy in Industrial Processes DOI: http://dx.doi.org/10.5772/intechopen.97008*

Whenever solar energy is integrated, there is a reduction in greenhouse gas emissions, but when the first objective is to reduce GHG, there should be no limitation in the economic aspect to achieve the objective. Because current international prices of conventional fuels constitute a determining restriction to integrate solar heat to industrial processes. Therefore, economic speculation of conventional fuel prices constitutes a relevant challenge to be considered in the proposal and implementation of energy policies that really intend to encourage business models

The authors are very grateful to the University of Guanajuato and Trade Union Association, ASPAAUG, for the partial support granted for the publication costs of

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° C.

° C.

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with renewables, and more specifically, with solar thermal energy.

**Acknowledgements**

**Conflict of interest**

**Nomenclature**

The authors declare no conflict of interest.

*Solar Cells - Theory, Materials and Recent Advances*

At Lateral area of the tube, m<sup>2</sup>

AHRN Area of the heat recovery network, m<sup>2</sup>

ASCN Area of the solar collector network, m<sup>2</sup>

CHRN Cost of the heat recovery network, USD. CAS Cost of auxiliary services, USD/year.

CST Costs associated with steam, USD/kW year.

CTS Cost of the system storage thermal, USD. Cp Heat capacity of the working fluid, kJ/kg° C.

CSCN Cost of the collector network, USD.

eff Pump efficiency, dimensionless. effTS Efficiency, dimensionless.

Hb Load pump, m. i Annual interest, %.

m\_ Mass flow rate, kg/s. n Number of years, y.

**470**

fA Annualisation factor, dimensionless.

IC 2010 Cost index for 2010, dimensionless. IC 2019 Cost index for 2019, dimensionless. L Length of the solar collector, m.

Nc Number of solar collectors, dimensionless. Ne Number of equipment, dimensionless.

CATS Annualised cost of the thermal storage system, USD/year. CCO Costs associated with cooling water, USD/kW year.

CTA HRN Cost of the annualised heat recovery network, USD/year. CTA SCN Annualised costs of the solar collector network, USD/year.

d Internal diameter of a tube of the solar collector, m.

hi Heat transfer coefficient of i-th stream, kW/m2

hj Heat transfer coefficient of j-th stream, in kW/m<sup>2</sup>

CP Mass flow multiplied by the specific heat of the stream, kW/ °C.

this chapter.


*Solar Cells - Theory, Materials and Recent Advances*

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*DOI: http://dx.doi.org/10.5772/intechopen.97008*

*Solar Energy in Industrial Processes*

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