Passive thermal management systems and related methods

A thermal management system comprising:

• a first heat exchanger including a first path for a first fluid and a second path for a second fluid, the first heat exchanger to transfer thermal energy between the first fluid and the second fluid;
• a second heat exchanger including a third path for the first fluid and a fourth path for a third fluid, the second heat exchanger to transfer thermal energy between the first fluid and the third fluid, the second heat exchanger in circuit with the first heat exchanger;
• a first thermostatic valve including a first thermostatic element, the first thermostatic element to actuate the first thermostatic valve to control a first rate of flow of the first fluid through the first heat exchanger based on a first temperature of the first fluid;
• and
• a second thermostatic valve including a second thermostatic element, the second thermostatic element to actuate the second thermostatic valve to control a second rate of flow of the first fluid through the second heat exchanger based on a second temperature of the third fluid.