Concrete ranks as the second most prevalent material on the planet. The manufacturing of cement, which is a vital component of concrete, releases a considerable amount of artificial waste heat, creating a significant sustainability challenge. PHX (Pressure and Heat Exchanger), a system employs a series of thermoelectric generators which harness waste heat and convert it into usable electricity. For instance, a standard kiln can generate 20 MW of power using PHX, sufficient to supply energy for about 10,000 homes, translating to an annual value of an approximate $12.3 million. This innovative approach not only lessens dependence on carbon-heavy energy sources but also optimizes the use of waste heat.