This dataset provides in-situ wind measurements collected between March 2024 and June 2025 from four urban locations in the southern region of the Dominican Republic: San Cristóbal, Azua, Barahona, and San Juan de la Maguana. Measurements were performed using Davis Instruments Vantage PRO2 meteorological stations, strategically installed to characterize the urban wind resource for potential microgeneration applications. The dataset includes wind speed, wind direction, air temperature, relative humidity, and atmospheric pressure. Data processing involved quality control procedures, gap filling through interpolation techniques, and subsequent analysis for wind characterization. The analysis was carried out using WRPLOT View – Wind Rose Plotting Software Version 9.2.0 for wind rose generation, HOMER Pro – Microgrid Analysis Tool, Version 3.18.4 for renewable resource assessment, and Microsoft Excel for parameterization of the Weibull distribution function. In addition, derived metrics such as theoretical wind potential and the theoretically available wind potential were calculated for each location. This dataset can serve as a valuable resource for preliminary renewable energy feasibility studies, particularly for screening and comparative assessments of small-scale or distributed generation in urban environments. It also supports urban energy planning and can be used to inform computational fluid dynamics (CFD) studies of urban wind flows, for example through boundary condition definition, model calibration, or comparative analysis, rather than direct validation of highly turbulent urban wind fields, and the design of hybrid wind–solar systems. Beyond energy applications, the data may be applied to urban climate studies, including the assessment of diurnal and seasonal variability and heat island effects, and to modeling the dispersion of air pollution in complex urban settings.

Hydrogen fuel is an emerging alternative clean energy solution to fossil fuels. Similar to global maritime transport sector emissions, Fiji's maritime sector largely depends on highly polluting non-renewable diesel oil. This study investigates the feasibility of future implementation of liquid hydrogen fuel in Fiji's uneconomical domestic maritime routes serviced by the Fiji Government Shipping Franchise Scheme (GSFS). Mathematical estimation of hydrogen demand, followed by economic and technological analysis, was performed. An annual volumetric hydrogen demand of 84,000 m3, requiring 363 GWh of electricity, is estimated. Out of the 10 GSFS routes, liquid hydrogen is expected to be suitable for 9 routes, with Rotuma route being the exception. To avert socio-political barriers, a proof-of-concept or a small-scale implementation is necessary with local and international funding. This study forms a precursor for future studies on hydrogen implementation in Fiji's maritime transport sector to assist decision-makers in emerging hydrogen fuel technologies

Using solar energy and waste heat for medium-temperature thermal applications depends on efficient and economical heat storage development. Developing a compact thermal energy storage system is essential to use excess thermal energy from a source in a process or to shift the utilisation time of solar thermal energy or recovered waste heat. Phase change materials are commonly used for energy storage applications globally. In this work, a latent heat thermal energy storage (LHTES) system with 2.37 kg of Erythritol as the phase change material (PCM) has been studied. A shell and tube heat storage system is selected due to its effectiveness in heat transfer. Synthetic silicone oil Hi-Tech Therm-60 was used as heat transfer fluid. Thermal stability tests in a differential scanning calorimeter (DSC) for a small sample mass and a specifically designed experiment for a larger sample mass were performed to assess the stability of the PCM. The time-dependent temperature distribution inside the storage system and the effect of heat transfer fluid (HTF) inlet temperature on the charging behaviour were studied during the charging process. Charging time and melt fraction have been calculated. No significant change in melting temperature and a 10% reduction in latent heat of PCM was observed in the thermal stability test for a small sample mass in DSC. The charging time of the storage device was observed to be 91–97 min and 195 min for 140 °C and 130 °C HTF inlet temperatures, respectively. The total stored energy in the system was 922 kJ with a Stefan number of 0.59. Temperature variation during the charging process inside the storage also suggests a buoyancy effect, leading to increased natural convection during the melting process.

Proper sizing of energy systems is a key aspect that allows avoiding overestimated installation costs or failures in operation and dispatch. However, most of the available sizing tools focus on systems dedicated only to electrical loads, omitting combined energy systems with simultaneous supply of various thermal demands. This study presents an adaptation of an existing open access techno-economic optimization model for broadening the design tool for small-scale energy systems supplying both, electrical and thermal needs. For this, a new typology of an energy system was proposed considering the use of biogas, solar energy and adding thermal components. This was followed by modifying the model framework, constraints equations and objective function, which is the net present cost of the system. Once the design tool was verified a model was constructed to analyse the feasibility of a polygeneration plant for an association of 30 small dairy farms. The developed model was able to optimize the sizing of the main system components for different proposed scenarios, encompassing supply of electricity, refrigeration, biogas for cooking and fertilizers. For the selected application it was found that the aggregated cost of producing electricity and heat ranges from 0.044 to 0.070 USD/kWh; the penetration of solar energy can reach up to 32%; while the annual potential savings of CO2 emissions of applying the solution ranges from 109 to 127 ton of CO2.

In this work is evaluated the performance of an upgraded hybrid Biomass-Solar power plant that operate in a cogeneration scheme in a sugar mill. The main purpose of this work is to explore in an upgraded scheme the contribution of the solar energy and alternative biomass sources for a round year operation and gain insight regarding the feasibility of this concept. The study is conducted in a potential power plant integrated to a sugar mill with a milling capacity of 4,600 ton of cane per day. The bagasse from the sugar cane, complemented with the solar energy, will be the main fuels for the power plant, Marabú (Dichrostachys cinerea) is also considered as a complementary biomass fuel in this study. The analysis is performed by upgrading the parameters of the existing thermal power block and considering two different scenarios A: bagasse and solar field, and B: bagasse, marabú and solar field as fuel for the cogeneration cycle. The most feasible configuration seems to be the combination of bagasse, marabú and solar as fuel sources, for superheated steam parameters of 105 bar and 5400C and a solar field aperture area of about 94, 000 m2 using parabolic Trough collectors. The net present value for the proposed system is about 35 million USD which indicates that could be economically feasible with a Levelelized Cost Of Energy (LCOE) of about 0.11 USD/kWh, since this is in the range of a typical LCOE for biomass electricity generation (0.06-0.21 USD/kWh).The proposed concept seems to be economically profitable with a NPV of 12242114 USD, an IRR of 6% and a payback period of about 10 years with a useful life for this technology of 25 years.

Fossil fuel crisis due to supply uncertainties and increasing prices, combined with climate changes evidence the need of energy solutions based in renewable energy sources. Innovative alternatives for sustainable and resilient energy system to the cities is necessary to tackle CO2 emissions. Small scale wind energy systems integrated into building in urban areas are a promising technological solution. In this work an urban wind energy potential adjusted assessment in Santo Domingo city, the Dominican Republic was performed. For this purpose, a simple but robust framework to provide a city-environment assessment of the wind energy potential considering roof-mounted turbines solution. An especial distinction to capture the effect of the height of the building in the electricity generation and related cost. The framework is based on six holistic stages: (1) site selection, (2) resource prospecting/analysis considering the effect of the high of the buildings, (3) turbine selection, (4) estimation of produced energy, (5) environmental evaluation and (6) resilience assessment. The urban wind energy potential deems the installation of 945 small two-blade Darrieus H-type vertical axis wind turbines (VAWTs) on the roofs of 189 existing high-rise buildings, yielding an annual energy production of about 834 MWh/yr with a potential CO2 emission reduction of 518 Ton/yr. For buildings higher than 140 m the levelized cost of the wind energy beginning to be competitive with the grid energy cost, close to 0.14 USD/kWh.

The transition towards sustainable economies with improved resource efficiency is today’s challenge for all productive sectors. The dairy sector in Latin America is growing without considering a clear path for sustainable energy and waste management solutions. This study proposes integrated solutions through a waste-to-energy approach. The solutions consider biogas production (via cow manure) as the main energy conversion pathway; technology solutions include biodigesters, power generators, and combined heat and power systems that supply not only the energy services demanded by dairy farms (for cooking gas, electricity, refrigeration and hot water) but also provide organic fertilizers. Biogas’ potential was estimated to verify whether it can cover the energy demands of the farms, while the levelized costs of producing biogas and electricity were the indicators for the techno-economic evaluation of the solutions. Greenhouse gas emission reductions were estimated by following IPCC guidelines. Specifically, the proposed solutions lead to energy self-sufficiency in most dairy farms with relevant biogas and electricity costs in the range of 1.7–3.7 and 6–12 USD cents/kWh, respectively. In addition, implementing the proposed solutions in Latin American dairy farms would allow annual greenhouse gas emission reductions of 32.8 Mton CO2 eq. with an additional 17 Mton if widespread use of the supplied organic fertilizers is achieved.

Syngas produced from small-scale biomass gasification plants (tens of kW) can generate power from biomass resources. However, due to the syngas gensets demand is marginal, compared to gasoline gensets, it is not easy to find a genset specially designed to run on syngas. In this paper, an experimental study of a genset running on two kinds of fuel has been carried out. The genset used is a 10 kW ICE initially designed to run on gasoline, in parallel, simulations based on CHEMKIN-PRO software were made. The study focuses on the comparison of the ICE operation independently working on gasoline and syngas. Modifications were required in the genset to adapt the intake system to run on syngas. The syngas is obtained from a gasifier. According to the test, it is possible to convert a gasoline engine to a 100% syngas engine through straightforward modifications in the inlet manifold but reducing the effi-ciency and power. The electrical power running the genset on gasoline was 6.7 kW, whereas, with syngas, it is 4.8 kW (31.4% of reduction). The efficiency running the ICE on gasoline was 13.7% at its rated power, whereas for the genset fuelled on syngas, it was 10.5% (23.4% reduction).

A Crossflow turbine is a device used to generate power from hydro, which is a renewable source of energy. The salient feature of this turbine is its simplicity in construction. In the past few decades, variables such as flow diverter, air holes, bidirectional flow were introduced in the turbine design to improve its efficiency. This paper presents a comprehensive review of the performance of the cross flow turbine. The review of literature is classified into experimental and numerical studies. The present study highlights the optimum range of geometrical variables required for the efficient design of a cross flow turbine. The study also emphasizes the importance of employing the cross flow turbine in remote places where run-of-river hydro power plants are feasible, as it provides a low-cost energy solution. The outcome of the present study will help the researchers to identify the research gap based on the present status of work done and to improve the performance of the cross flow turbine further in the future.

The methods currently used for designing a fluidized bed reactor in gasification plants do not meet an integrated methodology that optimizes all the different parameters for its sizing and operational regime. In the case of small-scale (several tens of kWs biomass gasifiers), this design is especially complex, and, for this reason, they have usually been built in a very heuristic trial and error way. In this paper, an integrated methodology tailoring all the different parameters for the design and sizing of a small-scale fluidized bed gasification plants is presented. Using this methodology, a 40 kWth biomass gasification reactor was designed, including the air distribution system. Based on this design, with several simplified assumptions, a reactor was built and commissioned. Results from the experimental tests using this gasifier are also presented in this paper. As a result, it can be said the prototype works properly, and it produces syngas able to produce thermal energy or even electricity.