Abstarct: In Natural Gas pressure reduction stations (PRS), Natural Gas is preheated in order to prevenent hydrate formation. Indirect water bath heaters are used for preheating natural gas. This heaters have low thermal efficiency and consume considerable amount of natural gas for preheating task. Due to abundance of PRS in Iran, energy reduction in this sector of Gas industry is necessary. In this study, three systems have proposed for energy reduction of heaters. The first system uses heated fluid via ground heat exchangers. The second proposed system uses ground source heat pump and photovoltaic system. Photovoltaic system provide electricity for heat pump. The third system investigate possibility of ground source heat pump and Turbo expander combination. Naturl gas at the inlet of PRS have a high potential for power generation. For that using ground source heat pump and turbo expander considered in this plan. Given that natural gas price affect the economic feasibility of the proposed systems, two price have been considered, one is baxsed on the domestic price of natural gas and the other is international price of natural gas. Discount rate considered to be 12 percent. Fuel consumption reduction with the first proposed system is 17.65 % and 38.4 % for Kouhdasht and Aligodarz. Discounted Payaback period for the mentioned PRS, are 8 and 2.35 year. The second proposed system is not economical. However, by implementing the third proposed system, discounted payback period for kouhdasht and Aligodarz stations are 10.1 and 9.1 years, respectively.