Thermal and Economical Analysis of the Solar Preheating of Steam Boiler Feed Water

It is presented that a feasibility assessment of solar preheating of steam boiler feed water for opened vapor systems. Data from a medium sized dairy industry near Rio de Janeiro city, in Brazil, is used to compose a case study. Forty eight solar heating system computer simulations were carried out in TRNSYS (transient system simulation software), for a range of design parameters corresponding to the 5% best economic results of a series of 2,700 simpler simulations (φ,f-chart method), programmed on Matlab. It has been used TMY (typical meteorological year) hourly weather data from Rio de Janeiro. Investment cost was composed from both commercial and literature values, while revenue was based on the avoided consumption of fuel for LPG (liquefied petroleum gas), natural gas and fuel oil, with only the first showing economically feasible. The results, however, made it possible to address environmentally sound public policies to encourage industrial solar energy use.

[1]  Theocharis Tsoutsos,et al.  Industrial solar thermal applications in Greece: Economic evaluation, quality requirements and case studies , 2001 .

[2]  Saad Mekhilef,et al.  A review on solar energy use in industries , 2011 .

[3]  M. A. Mohamad,et al.  Potential of solar energy utilization in the textile industry — a case study , 2001 .

[4]  Timothy Nicholas Anderson,et al.  Solar energy use for energy savings in dairy processing plants , 2008 .

[5]  Mario Motta,et al.  Solar Thermal Plants for Industrial Process Heat in Tunisia: Economic Feasibility Analysis and Ideas for a New Policy , 2012 .

[6]  Frank Kreith,et al.  Handbook of energy efficiency and renewable energy , 2007 .

[7]  C. S. Bhatia,et al.  Thermal analysis and performance optimization of a solar hot water plant with economic evaluation , 2012 .

[8]  Klaus Hennecke.  Solar Heat for Industrial Processes , 2010 .

[9]  Soteris A. Kalogirou,et al.  The potential of solar industrial process heat applications , 2003 .

[10]  H. Gonçalves,et al.  The Potential of Solar Heat in Industrial Processes. A State of the Art Review for Spain and Portugal , 2000 .

[11]  Shireesh B. Kedare,et al.  Design of solar thermal systems utilizing pressurized hot water storage for industrial applications , 2008 .

[12]  Robert Fuller,et al.  Solar industrial process heating in Australia – Past and current status , 2011 .

[13]  H. M. Brandão,et al.  Economia de escala no processo de resfriamento do leite , 2009 .

[14]  Klaus Vajen,et al.  The potential of solar heat for industrial processes in Germany , 2012 .

[15]  Soteris A. Kalogirou,et al.  Solar thermal collectors and applications , 2004 .

[16]  Angelika Bayer,et al.  Solar Engineering Of Thermal Processes , 2016 .