Innovative Family Farm in Cuba Uses Mix of Clean Energies

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Energy

Artist and farmer Chavely Casimiro and her daughter Leah Amanda Díaz feed one of the biodigesters at Finca del Medio, a farm in central Cuba. The biodigester produces about seven meters of biogas per day, enough energy for cooking, baking and dehydrating food. CREDIT: Jorge Luis Baños / IPS

Artist and farmer Chavely Casimiro and her daughter Leah Amanda Díaz feed one of the biodigesters at Finca del Medio, a farm in central Cuba. The biodigester produces about seven meters of biogas per day, enough energy for cooking, baking and dehydrating food. CREDIT: Jorge Luis Baños / IPS

TAGUASCO, Cuba, Oct 2 2023 (IPS) – Combining technologies and innovations to take advantage of solar, wind, hydro and biomass potential has made the Finca del Medio farm an example in Cuba in the use of clean energies, which are the basis of its agroecological and environmental sanitation practices.


Renewable energy sources are used in many everyday processes such as electricity generation, lighting, water supply, irrigation and water heating, as well as in cooking, dehydrating, drying, baking and refrigeration of foodstuffs.

“We started out with windmills on artesian wells and hydraulic rams to pump water. That gave us an awareness of the amount of energy we needed and of how to expand its use,” said farmer José Antonio Casimiro, 65, owner of this agroecological family farm located in the center of this long Caribbean island nation.

“More incentives, better policies and financial support are needed so that farming families have sufficient energy for their work and can improve the comfort of their homes and quality of life.” — José Antonio Casimiro

The farmer expressed his appreciation of the help of his son, 41, also named Antonio Casimiro, in the installation of the two mills at Finca del Medio, during the days in which IPS visited the farm and shared in activities with the family.

“There was no one to assemble or repair them. We both had to study a great deal, and we learned to do a lot of construction things as we went along and perfected the techniques,” said Casimiro junior, referring to the equipment that is now inactive, but is capable of extracting some 4,000 liters of water daily from the water table.

When rainfall is abundant and the volume of the 55,000-cubic-meter-capacity reservoir rises, the hydraulic ram comes to life. The device diverts about 20,000 liters of water to a 45,000-liter tank, 400 meters away and 18 meters above the level of the reservoir.

“The only energy the rams use is the water pressure itself. Placing it on the highest part of the land makes it easier to use the slope for gravity irrigation, or to fill the animals’ water troughs,” explained Chavely Casimiro, 28, the youngest daughter of José Antonio and Mileidy Rodríguez, also 65.

An artist who also inherited the family’s “farming gene”, Chavely highlighted some twenty innovations made by her father to the hydraulic ram, in order to optimize water collection.

Other inventions speed up the assembly and disassembly of the windmills for maintenance, or in the event of tropical cyclones.

“We have been replacing the water supply with solar panels, which are more efficient. They can be removed faster (than the windmill blades) if a hurricane is coming. You can incorporate batteries and store the energy,” said Casimiro.

“Let’s say a windmill costs about 2,000 dollars. With that amount you can buy four 350-watt panels. That would be more than a kilowatt hour (kWh) of power. You buy a couple of batteries for 250 dollars each, and with that amount of kWh you can pump the equivalent of the water of about 10 windmills,” he said.

But the farmer said the windmills are more important than the energy they generate. “It would be nice if every farm had at least one windmill. For me it is very symbolic to see them pumping up water,” he said.

Lorenzo Díaz, the husband of Chavely Casimiro, uses a solar oven to cook food. In the background can be seen a windmill and a solar heater, other technologies that take advantage of the potential for renewable energies on the Finca del Medio farm in central Cuba. CREDIT: Jorge Luis Baños / IPS

Lorenzo Díaz, the husband of Chavely Casimiro, uses a solar oven to cook food. In the background can be seen a windmill and a solar heater, other technologies that take advantage of the potential for renewable energies on the Finca del Medio farm in central Cuba. CREDIT: Jorge Luis Baños / IPS

Innovations

Located in the municipality of Taguasco, in the central province of Sancti Spíritus, some 350 kilometers east of Havana, Finca del Medio follows a family farm model including permaculture, agroecology and agricultural production based on the use of clean energy.

In 1993, Casimiro and Rodríguez with their children Leidy and José Antonio – a year later, Chavely was born – decided to settle on the 13-hectare farm of their paternal grandparents, with the aim of reversing its deterioration and soil erosion and installing perimeter fences.

The erosion of the land was due to the fact that in the past the farm was dedicated to the cultivation of tobacco, which depleted the soil, and later it had fallen into abandonment, as well as the house.

The older daughter is the only one who does not live and work on the farm, although she does spend time there, and a total of ten family members live there, including four grandchildren. All the adults either work on the farm or help out with different tasks.

With the help of technological innovations adapted to the local ecosystem, and empirical and scientific knowledge, the family has become self-sufficient in rice, beans, tubers, vegetables, milk, eggs, honey, meat, fish and more than 30 varieties of fruit. The only basic foodstuffs not produced on the farm are sugar and salt.

They sell all surplus production, including cow’s milk, for which they have specific contracts, and they are also promoting agrotourism, for which they are making further improvements to the facilities.

At Finca del Medio, a system of channels and ditches allows the infiltration of rainwater, reduces erosion of the topsoil and conserves as much water as possible for subsequent irrigation.

These innovations also benefit neighboring communities by mitigating flooding and replenishing the water table, which has brought water back to formerly dry wells.

The construction of the house is also an offshoot of technological solutions to the scarcity of resources such as steel, which led to the design of dome-shaped roofs made of mud bricks and cement.

The design aids in rainwater harvesting, improves hurricane protection, and boosts ventilation, creating cooler spaces, which reduces the need for air conditioning equipment and bolsters savings.

Along with food production, the new generations and members of the Casimiro-Rodriguez family engage in educational activities to raise awareness about good agricultural and environmental practices.

Students from nearby schools come to the farm to learn about these practices, as well as specialists in agroecology and people from different parts of the world, interested in sharing the experience. Meanwhile, several members of the family have traveled abroad to give workshops on agroecology and permaculture.

Farmers José Antonio Casimiro and his son of the same name talk in the mechanical workshop at their Finca del Medio farm. Both have come up with innovations for the use of windmills, the hydraulic ram and biodigesters, as well as agricultural tools. CREDIT: Jorge Luis Baños / IPS

Farmers José Antonio Casimiro (R) and his son of the same name talk in the mechanical workshop at their Finca del Medio farm. Both have come up with innovations for the use of windmills, the hydraulic ram and biodigesters, as well as agricultural tools. CREDIT: Jorge Luis Baños / IPS

Solar and biogas potential

On one of the side roofs of the house are 28 photovoltaic panels that provide about eight kWh, connected to batteries. The stored energy covers the household’s needs during power outages that affect the island due to fuel shortages and breakdowns and problems in maintenance of its aging thermoelectric plants.

In addition, the household has three solar water heaters with a capacity of 380 liters.

Next to the kitchen, two fixed-dome biodigesters produce another renewable fuel, biogas, composed mainly of methane and carbon dioxide from the anaerobic decomposition of animal manure, crop waste and “even sewage from the house, which we channel so that the waste does not contaminate the environment,” said Casimiro.

Due to the current shortage of manure as the number of cows has been reduced, only one of the biodigesters is now operational, producing about seven meters of biogas per day, sufficient for cooking, baking and dehydration of foodstuffs.

The innovative family devised a mechanism to extract – without emptying the pond of water or stopping biogas production – from the bottom the solids used as biofertilizers, as well as hundreds of liters of effluent for fertigation (a combination of organic fertilizers and water) of the crops, by gravity.

The installation of the biodigesters, the solar panels and one of the solar heaters was supported by the Swiss Agency for Development and Cooperation (Cosude) and the Indio Hatuey Experimental Station of Pastures and Forages through its Biomass-Cuba project, Casimiro said.

He also expressed gratitude for the link with other scientific institutions such as the Integrated Center for Appropriate Technologies, based in the central province of Camagüey, which is focused on offering solutions to the needs of water supply and environmental sanitation, and played an essential role in the installation of the hydraulic ram.

The farmer said the farm produces the equivalent of about 20 kWh from the combination of renewable energies, and if only conventional electricity were used, the cost would be around 83 dollars a month.

Lorenzo Díaz feeds firewood into an innovative stove that allows the Finca del Medio farm to efficiently cook food, dehydrate or dry fruits and spices, heat water and preserve meat, among other functions. CREDIT: Jorge Luis Baños / IPS

Lorenzo Díaz feeds firewood into an innovative stove that allows the Finca del Medio farm to efficiently cook food, dehydrate or dry fruits and spices, heat water and preserve meat, among other functions. CREDIT: Jorge Luis Baños / IPS

Efficient stove

In the large, functional kitchen, the stove covered with white tiles and a chimney has been remodeled 16 times to make it more efficient and turn it into another source of pride at the farm.

Fueled by firewood, coconut shells and other waste, “the stove makes it possible to cook food, dehydrate fruits and spices, heat water and preserve meat, among other tasks,” Rodríguez told IPS as she listed some of the advantages of this other offshoot of the family’s ingenuity that helps her as a skilled cook and pastry chef.

She pointed out that by extracting all the smoke, “the design makes better use of the heat, which will be used in a sauna” being built next to the kitchen, for the enjoyment of the family and potential tourists.

Casimiro is in favor of incorporating clean energy into agricultural processes, but he said that “more incentives, better policies and financial support are needed so that farming families have sufficient energy for their work and can improve the comfort of their homes and quality of life.”

Since 2014, Cuba has had a policy for the development of renewable energy sources and their efficient use.

A substantial modification of the national energy mix, which is highly dependent on the import of fossil fuels and hit by cyclical energy deficits, is a matter of national security

However, regulations with certain customs exemptions and other incentives to increase the production of solar, wind, biomass and hydroelectric energies in this Caribbean island nation still seem insufficient in view of the high prices of these technologies, the domestic economic crisis and the meager purchasing power of most Cuban families.

Clean sources account for only five percent of the island’s electricity generation, a scenario that the government wants to radically transform, with an ambitious goal of a 37 percent proportion by 2030, which is increasingly difficult to achieve.

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Doubts about Chile’s Green Hydrogen Boom

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Energy

The administration of President Gabriel Boric, a self-described environmentalist, is facing a growing rift between scientists, social leaders and energy companies that have differences with regard to the production of green hydrogen in Magallanes. The first wind turbines have already been installed in the Magallanes region, in the far south of Chile, such as these in Laredo Bay, east of Cabo Negro, where companies are pushing green hydrogen projects in a scenario where environmental costs are beginning to take center stage. CREDIT: Courtesy of Erika Mutschke

The administration of President Gabriel Boric, a self-described environmentalist, is facing a growing rift between scientists, social leaders and energy companies that have differences with regard to the production of green hydrogen in Magallanes. The first wind turbines have already been installed in the Magallanes region, in the far south of Chile, such as these in Laredo Bay, east of Cabo Negro, where companies are pushing green hydrogen projects in a scenario where environmental costs are beginning to take center stage. CREDIT: Courtesy of Erika Mutschke

SANTIAGO, Oct 12 2022 (IPS) – In Magallanes, Chile’s southernmost region, doubts and questions are being raised about the environmental impact of turning this area into the world’s leading producer of green hydrogen.


The projects require thousands of wind turbines, several desalination plants, new ports, docks, roads and hundreds of technicians and workers, with major social, cultural, economic and even visual impacts.

“The scale of production creates uncertainties, heightened because there is no baseline. The question is whether Chile currently has the capacity to carry out large-scale green hydrogen projects.” — Jorge Gibbons

This long narrow South American country of 19.5 million people sandwiched between the Andes Mountains and the Pacific Ocean has enormous solar and wind energy potential in its Atacama Desert and southern pampas grasslands. This has led to a steady increase in electricity generation from clean and renewable sources.

In 2013, only six percent of the country’s total electricity generation came from non-conventional renewable sources (NCREs) – a proportion that climbed to 32 percent this year. Installed NCRE capacity in September reached 13,405 MW, representing 40.7 percent of the total. Of the NCREs, solar energy represents 23.5 percent and wind power 12.6 percent.

In Chile, NCREs are defined as wind, small hydropower plants )up to 20 MW), biomass, biogas, geothermal, solar and ocean energy.

According to the authorities, the wind potential of Magallanes could meet 13 percent of the world’s demand for green hydrogen, with a potential of 126 GW.

Green hydrogen is generated by low-emission renewable energies in the electrolysis of water (H2O) by breaking down the molecules into oxygen (O2) and hydrogen (H2). It currently accounts for less than one percent of the world’s energy.

However, it is projected as the energy source with the most promising future to advance towards the decarbonization of the economy and the replacement of hydrocarbons, due to its potential in electricity-intensive industries, such as steel and cement, or in air and maritime transportation.

The National Green Hydrogen Strategy, launched in November 2021 by the second government of then right-wing President Sebastián Piñera (2018-2022), seeks to increase carbon neutrality, decrease Chile’s dependence on oil and turn this country into an energy exporter.

The government of his successor, leftist President Gabriel Boric, in office since March, created an Interministerial Council of the Green Hydrogen Industry Development Committee, with the participation of eight cabinet ministers.

A spokesperson from the Ministry of Energy told IPS that “this committee has agreed to bring forward, from 2025 to 2022, the update of the National Green Hydrogen Strategy and the new schedule for the allocation of state-owned land for these projects.”

“We will promote green hydrogen in a cross-cutting manner, with an emphasis on harmonious, fair and balanced local development. By bringing forward the update of the strategy, we seek to generate certainty for investors and to begin to create the necessary regulatory framework for the growth of this industry in our country,” he said.

In the area known as Cabo Negro, in the Chilean region of Magallanes, several companies have installed wind turbines to generate wind energy. The installation of thousands of turbines will affect the landscape of Magallanes and environmentalists believe it will impact many birds that migrate annually to this southern region. CREDIT: Courtesy of Erika Mutschke

In the area known as Cabo Negro, in the Chilean region of Magallanes, several companies have installed wind turbines to generate wind energy. The installation of thousands of turbines will affect the landscape of Magallanes and environmentalists believe it will impact many birds that migrate annually to this southern region. CREDIT: Courtesy of Erika Mutschke

Warnings from environmentalists

In a letter to the president, more than 80 environmentalists warned of the risk of turning “Magallanes y La Antarctica Chilena” – the region’s official name – into an environmental sacrifice zone for the development of green hydrogen.

“The energy transition cannot mean the sacrifice of migratory routes of birds that are in danger of extinction, otherwise it would not be a fair or sustainable transition,” said the letter, which has not yet received a formal response.

Environmentalists argue that the impact is not restricted to birds, but also affects whales that breed there, due to the effects of desalination plants, large ports and harbors.

Carmen Espoz, dean of science at the Santo Tomás University, who signed the letter, told IPS that “the main warning that we have tried to raise with the government, and with some of the companies with which we have spoken, is that there is a need for zoning or land-use planning, which does not exist to date, and for independent, quality baseline information for decision-making” on the issue.

Espoz, who also heads the Bahía Lomas Center in Magallanes, based in Punta Arenas, the regional capital, clarified that they are not opposed to the production of green hydrogen but demand that it be done right.

It is urgently necessary, she said in an interview in Santiago, to “stop making decisions at the central level without consultation or real participation of the local communities and to generate the necessary technical information base.”

The signatories asked Boric to create a Regional Land Use Plan with Strategic Environmental Assessment to avoid unregulated development of projects.

“We are not only talking about birds, but also about profound social, cultural and environmental impacts,” said Espoz, who argued that the model promoted by the government and green hydrogen developers “does not have a social license to implement it.”

Sunset at Laredo Bay in the Magallanes region where the Chilean government will have to decide on what changes in the grasslands are acceptable, in the face of a flood of requests to use the area for largescale green hydrogen projects. CREDIT: Courtesy of Erika Mutschke

Sunset at Laredo Bay in the Magallanes region where the Chilean government will have to decide on what changes in the grasslands are acceptable, in the face of a flood of requests to use the area for largescale green hydrogen projects. CREDIT: Courtesy of Erika Mutschke

The bird question

Prior to this letter to Boric, the international scientific journal Science published a study by Chilean scientists warning about potential impacts of wind turbines on the 40 to 60 species of migratory birds that visit Magallanes.

“It is estimated that the installation of wind turbines along the migratory paths of birds could affect migratory shorebird populations, which is especially critical in the cases of the Red Knot (Calidris canutus rufa) and the Magellanic Plover (Pluvianellus socialis),” said Espoz.

Both species, she said, “are endangered, as is the Ruddy-headed Goose (Chloephaga rubidiceps).”

She added that if 13 percent of the world’s green hydrogen is to be generated in southern Chile, some 2,900 wind turbines will have to be installed by 2027, “which could cause between 1,740 and 5,220 collisions with bird per year.”

Jorge Gibbons, a marine biologist at the University of Magallanes, based in Punta Arenas, said the big problem is that Magallanes does not have a baseline for environmental issues.

“The scale of production creates uncertainties, heightened because there is no baseline. The question is whether Chile currently has the capacity to carry out large-scale green hydrogen projects,” he told IPS from the capital of Magallanes.

Gibbons believes it would take about two years to update the data on the dolphin and Southern Right Whale (Eubalaena australis) populations

“The greatest risks to dolphins will be seen in the Strait of Magellan. I am talking about Commerson’s Dolphins (Cephalorhynchus commersonii), which are only found there in Chile and whose population is relatively small,” he said.

He proposed studying the route to ports and harbors of these species and to analyze how they breed and feed.

“The issue is how noise disturbs them or interrupts their routes. These questions are still unanswered, but we know some things because it is the best censused species in Chile,” he explained.

According to Gibbons, the letter to Boric is timely and will help reduce uncertainty because “the process is just beginning and the scientific and local community are now wondering if the plan will be well done.”

Conflict of interests

The partnership between HIF Chile and Enel Green Power Chile withdrew from the Environmental Evaluation System the study of the Faro del Sur Wind Farm project, involving an investment of 500 million dollars for the installation of 65 three-blade wind turbines on 3,791 hectares of land in Magallanes.

The study was presented in early August with the announcement that it was “a decisive step for the future of green hydrogen-based eFuels.”

But on Oct. 6, its withdrawal was announced after a series of observations were issued by the Magallanes regional Secretariat of the Environment.

“The observations of some public bodies in the evaluation process of this wind farm exceed the usual standards,” the consortium formed by the Chilean company HIF and the subsidiary of the Italian transnational Enel claimed in a statement.

The companies argued that “the authorities must provide clear guidelines to the companies on the expectations for regional development, safeguarding the communities and the environment.

“In light of these exceptional requirements, it is necessary to understand which requirements can be incorporated and which definitely make projects of this type unfeasible in the region,” they complained.

The government reacted by stating that it is important to remember that Faro del Sur is the first green hydrogen project submitted to the environmental assessment process in Magallanes.

“During the process, some evaluating entities made observations on the project, so the owners decided to withdraw it early, which does not prevent them from reintroducing it when they deem it convenient,” the Ministry of Energy spokesperson told IPS.

He added that the ministry stresses “the conviction to develop the green hydrogen industry in the country and that this means sending out signals, but in no case should this compromise environmental standards and citizen participation in the evaluation processes.”

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