Scaling effects of a novel solar receiver for a micro gas-turbine based solar dish system

Aichmayer, Lukas; Garrido, Jorge; Laumert, Björn

doi:10.1016/j.solener.2018.01.020

Cited by 19 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initially, in absence of design details, a simplified model for the volumetric receiver was developed and implemented in EES [11]. In the final step, once available the receiver performance maps provided by KTH, based on a 2D CFD model and ray tracing tool described elsewhere [37,38], the receiver outlet temperature T 3 was evaluated by means of data interpolation; the input data to the receiver maps are the receiver inlet temperature (T 5 ), the air mass flow rate ( . m) and the DNI, while the outlet parameters are the receiver thermal efficiency (η r ), the receiver outlet temperature (T 3 ) and the receiver pressure drops (∆P r ).…”

Section: Receiver Modellingmentioning

confidence: 99%

A Quasi-Steady State Model of a Solar Parabolic Dish Micro Gas Turbine Demonstration Plant

et al. 2022

Self Cite

View full text Add to dashboard Cite

In the framework of the European Optimised Microturbine Solar Power system (OMSoP) project, a novel energy system for solar electricity production was developed, based on the integration of the solar dish technology with Micro Gas Turbines (MGT). A pilot plant with a capacity of 5–7 kWe was realized and installed at the ENEA Casaccia site (Rome) and went under testing to validate the feasibility of the technology and improve the current design. The present work deals with the development of a quasi-state system model, built in the Engineering Equation Solver environment, composed of different modules that correspond to the main system components. The system model was used to define the optimal system parameters, to help the elaboration on an operational strategy to maximize the overall plant efficiency, and to guide the improvement of the single components in view of their optimised design. From the analysis it emerged that the system in design conditions is able to generate, in nominal conditions, 4.5 kWe instead of the expected 5 kWe due to the limitation of the stator current to 13 A, while maximum levels of 5.6 kW could be achieved by “overcharging” the high-speed generator up to 15 A and operating the MGT at the very high speed of 150 krpm. From the transient simulation of the demo system on an annual basis, the maximum average output power is 3.58 kWe. Regarding the cycle efficiency, the annual averaged value is about 17%, whereas the target value is 21%. The improvement of the generator only does not seem to significantly increase the power output on the annual basis (3.75 kWe vs. 3.58 kWe). Differently, the improvement of the solar dish, with the upgrade of the other system components, would significantly increase the system power output to around ~10 kWe.

show abstract

Section: Receiver Modellingmentioning

confidence: 99%

A Quasi-Steady State Model of a Solar Parabolic Dish Micro Gas Turbine Demonstration Plant

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Cavity receiver is a well-known technique where the concentrated solar radiation strikes on the opaque cavity wall to heat the surface and then transfer to the heat transfer fluid through the wall. 7 Loni et al 8 modeled numerically and optimized thermally a cavity receiver of parabolic dish solar collector. The findings showed that larger cavity tube diameter caused higher surface wall temperature.…”

Section: Introductionmentioning

confidence: 99%

“…This technology depends upon the focus of solar radiation to a minor region or receiver where heat is transferred to the working fluid. Cavity receiver is a well‐known technique where the concentrated solar radiation strikes on the opaque cavity wall to heat the surface and then transfer to the heat transfer fluid through the wall 7 …”

Section: Introductionmentioning

confidence: 99%

Thermo‐environmental investigation of solar parabolic dish‐assisted multi‐generation plant using different working fluids

et al. 2020

View full text Add to dashboard Cite

The present study investigates the performance of a multi-generation plant by integrating a parabolic dish solar collector to a steam turbine and absorption chiller producing electricity and process heat and cooling. Thermodynamic modeling of the proposed solar dish integrated multi-generation plant is conducted using engineering equation solver to investigate the effect of certain operating parameters on the performance of the integrated system. The performance of the solar integrated plant is evaluated and compared using three different heat transfer fluids, namely, supercritical carbon dioxide, pressurized water, and Therminol-VPI. The useful heat gain by collector is utilized to drive a Rankine cycle to evaluate the network output, rate of process heat, cooling capacity, overall energetic, and exergetic efficiencies as well as coefficient of performance. The results show that water is an efficient working fluid up to a temperature of 550 K, while Therminol-VPI performs better at elevated temperatures (630 K and above). Higher integrated efficiencies are linked with the lower inlet temperature and higher mass flow rates. The integrated system using pressurized water as a heat transfer fluid is capable of producing 1278 and 832 kW of power output and process heat, respectively, from input source of almost 6121 kW indicating overall energy and exergy efficiencies of 34.5% and 37.10%, respectively. Furthermore, multi-generation plant is evaluated to assess the exergy destruction rate and steam boiler is witnessed to have the major contribution of this loss followed by the turbine. The exergo-environmental analysis is carried out to evaluate the impact of the system on its surroundings. Exergo-environmental impact index, impact factor, impact coefficient, and impact improvement are evaluated against increase in the inlet temperature of the collector. The single-effect absorption cycle is observed to have the energetic and exergetic coefficient of performances of 0.86 and 0.422, for sCO 2 operating system, respectively, with a cooling load of 228 kW.

show abstract

“…Power plants down-scaling has become a major challenge to promote a wider use of thermal renewable energy employing low-tomoderate temperature sources [1]. This may rise the contribution of solar [2], geothermal [3], biomass and waste energy [4] sources in future scenarios with increasing electricity distributed generation [5] and micro-combined heat and power systems [6]. However, a low temperature of the thermal source prevents the primary heat from being efficiently converted to electrical power.…”

Section: Introductionmentioning

confidence: 99%

Reynolds-number-dependent efficiency characterization of a micro-scale centrifugal compressor using non-conventional working fluids

Valdés

Sebastián

Abbas

2018

Energy Conversion and Management

View full text Add to dashboard Cite

The selection of working fluids other than air is a key issue in improving the efficiency of new thermodynamic cycles intended for low-to-moderate temperature small power plants The aim of this paper is to study whether the low efficiency typical of small turbomachinery is still a problem when using alternative fluids Based on a new design of power cycles named balanced hybrid Rankine-Brayton cycles, five different fluids were selected as potential working fluids: carbon dioxide, propane, isobutane, pentafluoroethane and sulfur hexafluoride Dimensional analysis was used to compare the performances of a micro-scale centrifugal compressor working in homologous points where the efficiency variation depends only on the Reynolds-number (Re) The influence of Re on efficiency was calculated by means of four different methods for comparative purposes Numerical simulations were also carried out in order to validate the methodological approach proposed The results show the efficiency variations as a function of Re for increasing fluid densities All the nonconventional fluids studied provide better performance in terms of efficiency than air Particularly, isobutane and propane have been identified as potential working fluids candidates for the aforementioned innovative power cycle *

show abstract

Scaling effects of a novel solar receiver for a micro gas-turbine based solar dish system

Abstract: This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.

Cited by 19 publications

References 43 publications

A Quasi-Steady State Model of a Solar Parabolic Dish Micro Gas Turbine Demonstration Plant

A Quasi-Steady State Model of a Solar Parabolic Dish Micro Gas Turbine Demonstration Plant

Thermo‐environmental investigation of solar parabolic dish‐assisted multi‐generation plant using different working fluids

Reynolds-number-dependent efficiency characterization of a micro-scale centrifugal compressor using non-conventional working fluids

Contact Info

Product

Resources

About