Abstract
This paper presents an analysis to determine the economic, energetic, and environmental benefits that could be obtained from the implementation of a combined solar-power organic Rankine cycle (ORC) with electric energy storage (EES) to supply electricity to several commercial buildings including a large office, a small office, and a full service restaurant. The operational strategy for the ORC-EES system consists in the ORC charging the EES when the irradiation level is sufficient to generate power, and the EES providing electricity to the building when there is not irradiation (i.e., during night time). Electricity is purchased from the utility grid unless it is provided by the EES. The potential of the proposed system to reduce primary energy consumption (PEC), carbon dioxide emission (CDE), and cost was evaluated. Furthermore, the available capital cost for a variable payback period for the ORC-EES system was determined for each of the evaluated buildings. The effect of the number of solar collectors on the performance of the ORC-EES is also studied. Results indicate that the proposed ORC-EES system is able to satisfy 11%, 13%, and 18% of the electrical demand for the large office, the small office and the restaurant, respectively.
Highlights
Organic Rankine cycles (ORCs) have been widely studied [1,2,3,4,5]
Investigated a combined heat and power (CHP) system using an organic Rankine cycle (ORC)-energy storage (EES) with heat supplied by a power generation unit (PGU) to evaluate the potential for cost savings, carbon dioxide emission (CDE) reduction, primary energy consumption (PEC) savings, and the available capital cost for a desired payback period for a restaurant located in twelve U.S cities
This paper investigates the performance of a novel solar powered ORC that directly charges an EES device that is designed to supply electricity generated by the solar powered ORC to one of the following potential facilities: a small office, a large office, and a restaurant, all located in Tucson, AZ
Summary
Organic Rankine cycles (ORCs) have been widely studied [1,2,3,4,5]. ORCs using solar energy as the heat source have been investigated. Investigated a CHP system using an ORC-EES with heat supplied by a PGU to evaluate the potential for cost savings, CDE reduction, primary energy consumption (PEC) savings, and the available capital cost for a desired payback period for a restaurant located in twelve U.S cities. Local weather data from Tucson, AZ and Jackson, MS were used to evaluate the effect of different climate zones on the ORCs. A thermo-economic analysis was performed to determine first and second law efficiencies as well as the potential for PEC and CDE savings and the available capital cost. This paper investigates the performance of a novel solar powered ORC that directly charges an EES device that is designed to supply electricity generated by the solar powered ORC to one of the following potential facilities: a small office, a large office, and a restaurant, all located in Tucson, AZ. The available capital cost to implement the ORC-EES, the effect of the number of solar collectors in the ORC, and the battery size, battery discharge hours, and percentage of energy supplied to the building are investigated in this paper
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