Solar Water Heater Preheating for Power Plants: Potential Coal Savings

Solar Water Heater Preheating for Power Plants: Potential Coal Savings

Amit A Gujar

Executive Summary
This research article investigates the integration of solar water heater preheating systems into thermal power plants as a means to reduce coal consumption and improve overall plant efficiency. Given the increasing challenges associated with fossil fuel supply, environmental concerns, and the need for cost-effective solutions, solar preheating technology offers a promising opportunity to enhance the feedwater heating process. Traditional coal-only systems require significant coal consumption to raise water temperatures to the necessary levels for effective steam generation. By incorporating solar thermal energy, which supplements the conventional heat source, plants can achieve higher thermal efficiency through reduced auxiliary fuel usage.

In this study, we examine the technical underpinnings of solar water heater preheating, perform detailed thermal efficiency calculations based on standard engineering protocols, and analyze the cost-benefit parameters including return on investment (ROI), payback period, and annual coal savings metrics. Several case studies from diverse geographical locations are reviewed to provide comparative efficiency data and to underscore the regional versatility of the technology. Decision-makers in thermal power production and energy policymakers are encouraged to consider these findings for practical implementations, as proper integration of solar preheating can lead to significant coal savings and environmental benefits.