This is the 9381st most frequent Russian word.
теплоэнерго
"Теплоэнерго" refers to "thermal energy" or "heat energy," often associated with organizations or systems producing and distributing thermal power for heating purposes.
Here, "теплоэнерго" is used as the name of a company, which specializes in thermal energy or related services.
Моя подруга работает инженер в компании "Теплоэнерго".
My friend works as an engineer at the company "Teploenergo".
Here, "теплоэнерго" is used as a term encompassing services related to thermal energy.
Самый крупный поставщик услуг теплоэнерго в городе планирует модернизацию систем.
The largest provider of thermal energy services in the city plans to upgrade its systems.
In this context, "теплоэнерго" refers to the theoretical or systemic aspects of thermal energy.