超临界CO2布雷顿循环余热回收系统性能分析与优化

余廷芳,宋凌

Performance analysis and optimization of supercritical CO2 Brayton cycle waste heat recovery system

Ting-fang YU,Ling SONG

表 2 SCBC/ORC系统各部件能量守恒及㶲守恒方程

Tab.2 Energy and exergy balance expressions for each component in SCBC/ORC system

部件 能量守恒方程 㶲守恒方程 吸热器 ${\varPhi_{ {\text{ER} } } } = {q_{m,{\text{s} } } }({h_{\text{5} } } - {h_{\text{4} } })$ ${E_{\text{4} } }+{E_{\text{q, ER} } } = {E_{\text{5} } }+{E_{ {\text{d,ER} } } }$ 透平 $ {P_{\text{T}}} = {q_{m,{\text{s}}}}({h_{\text{5}}} - {h_{\text{6}}}) $ $ {E_{\text{5}}} = {E_{\text{6}}}+{P_{\text{T}}}+{E_{{\text{d,T}}}} $ 主压缩机 $ {P_{{\text{MC}}}} = ({q_{m,{\text{s}}}} - {q_{m,{\text{r}}}})({h_{\text{2}}} - {h_{\text{1}}}) $ $ {E_{\text{1}}}+{P_{{\text{MC}}}} = {E_{\text{2}}}+{E_{{\text{d,MC}}}} $ 再压缩机 $ {P_{{\text{RC}}}} = {q_{m,{\text{r}}}}({h_{\text{3}}} - {h_{\text{8}}}) $ $ {E_{\text{8}}}+{P_{{\text{RC}}}} = {E_{\text{3}}}+{E_{{\text{d,RC}}}} $ 高温回热器 $ {q_{m,{\text{s}}}}({h_{\text{6}}} - {h_{\text{7}}}) = {q_{m,{\text{s}}}}({h_{\text{4}}} - {h_{\text{3}}}) $ $ {E_{\text{6}}}+{E_{\text{3}}} = {E_{\text{7}}}+{E_{\text{4}}}+{E_{{\text{d,HTR}}}} $ 低温回热器 $ {q_{m,{\text{s}}}}({h_{\text{7}}} - {h_{\text{8}}}) = ({q_{m,{\text{s}}}} - {q_{m,{\text{r}}}})({h_{\text{3}}} - {h_{\text{2}}}) $ $ {E_{\text{7}}}+{E_{\text{2}}} = {E_{\text{8}}}+{E_{\text{3}}}+{E_{{\text{d,LTR}}}} $ 蒸发器 $ ({q_{m,{\text{s}}}} - {q_{m,{\text{r}}}})({h_{\text{8}}} - {h_{\text{9}}}) = {q_{m,{\text{o}}}}({h_{{\text{09}}}} - {h_{{\text{012}}}}) $ $ {E_{\text{8}}}+{E_{{\text{012}}}} = {E_{\text{9}}}+{E_{09}}+{E_{{\text{d,GO}}}} $ 涡轮机 $ {P_{{\text{TO}}}} = {q_{m,{\text{o}}}}({h_{{\text{09}}}} - {h_{{\text{010}}}}) $ $ {E_{{\text{09}}}} = {E_{{\text{010}}}}+{P_{{\text{TO}}}}+{E_{{\text{d,TO}}}} $ 次冷却器 ${\varPhi_{ {\text{CO} } } } = {q_{m,{\text{o} } } }({h_{ {\text{010} } } } - {h_{ {\text{011} } } })$ ${E_{ {\text{010} } } } = {E_{ {\text{011} } } }+{E_{ {\text{q,CO} } } }+{E_{ {\text{d,CO} } } }$ 泵 $ {P_{{\text{PO}}}} = {q_{m,{\text{o}}}}({h_{{\text{012}}}} - {h_{{\text{011}}}}) $ $ {E_{{\text{011}}}}+{P_{{\text{PO}}}} = {E_{{\text{012}}}}+{E_{{\text{d,PO}}}} $ 主冷却器 ${\varPhi_{ {\text{CS} } } } = ({q_{m,{\text{s} } } } - {q_{m,{\text{r} } } })({h_{\text{9} } } - {h_{\text{1} } })$ ${E_{\text{9} } } = {E_{\text{1} } }+{E_{ {\text{q,CS} } } }+{E_{ {\text{d,CS} } } }$