How to set a heat source with period heating
 

Dear all

How can I do if there is a heat source generates a heat energy of fixed amount depend on temperature, for example :
T=300K Q=50J, T=330K Q=60J (not constant heat flux nor fixed heating power)?

Follow the preceding question how can I set that if I want to switch generate heat over absorb heat?

Thanks for reading my questions, if every senior has any proposal or technique, please guide me through the difficulties enthusiastically.