Energy cost saving = cheap energy + efficient energy use
Half of greenhouse production costs is energy
Utilization of cheap geothermal energy is the key of profitable production. If efficient heating technology is applied simultaneously, the producers’ competitiveness is further increased.
The efficiency of blanket heating surpasses the efficiency of any other greenhouse heating technologies, because it transfers heat directly to the plants.
The waste heat from thermal power plants, as a free energy, is an unexploited opportunity
Condensation heat, flue gas heat, flash steam, heat from process cooling
Electricity production increases year by year. The technology of power production is improving, however, the basic process of thermal power generation, the dominant power generation technology, does not change.
In power plants, which apply the traditional steam cycle, steam is generated by burning fuel, then the steam is lead to turbines, which drive electric generators. The spent steam, leaving the turbines, is condensed to warm water.
According to the relevant physical principles, the larger part (ca. 70%) of the fuel energy appears as waste heat, and is emitted into the environment through the cooler and the stack. The ratio of useful electric energy is around 30%, while the rest is waste heat.
Heat reserve of geothermal waters: the untapped renewable energy source…
Biomass: the reliable renewable energy source
If no “waste” energy is available, usually the best choice is the application of biomass boilers. Any type of biomass boilers can do the job, if they are selected for the peak winter load.
In an agricultural environment some forms of cheap combustible biomass are often available. Biomass based heating, as compared with hydrocarbon based heating, is usually cost-effective, in spite of the higher investment costs. The buffering capacity of the heating blankets may allow the intermittent operation of the boilers during the day, what helps save labor costs.
The utilization of agricultural wastes for energy production can be a take-off opportunity for agriculture. Marginal lands, not applicable for other purposes, can be used for energy plantations.