Keyingi yillarda dunyoning rivojlangan mamlakatlarida energiya tejamkorligiga katta ahamiyat berilmoqda.Energiyaga bo ׳lgan talabning ortishi bilan uning manbalarining turlari ham ko ׳payib bormoqda. Shuning uchun buehtiyojni qondirishning al'ternativ variantlari paydo bo ׳ldi. Bu manbani tanlashda energiya ishlab chiqaruvchi korxonava iste'molchining foydasini o ׳ylab emas, balki butun mamlakat miqyosida katta samaraga erishish uchun eksergetiktahlil qilish kerak.

Tayanch iboralar: energiya, energiyatashuvchi, eksergiya, atrof-muhit, entropiya, organik yoqilg ׳i, termodinamikmuvozanat, qaytar va qaytmas jarayonlar, ruda, oqim.

In recent years, in developed countries, there has been a sharp increase in attention to the issues of saving fuel andenergy, increasing the efficiency of their use. In this article, energy conservation issues are revised, introducing theconcept of "exergy" - the determining value of energy and should be used for final calculations when choosing aparticular source of energy.

Key words: energy, energy carrier, exergy, environment, entropy, organic fuel, thermodynamic equilibrium reversible and irreversible processes, ore, flow.