def calc_cold_storage_discharge_HEX(m_hot_0, Q_hot_0, T_cold_in, T_hot_in, T_hot_out):
"""
:param mcp_hot: secondary side
:param Q_hot: required heat from the primary side
:param T_cold_in:
:param T_hot_in:
:param T_hot_out:
:return:
"""
# nominal conditions on the tank side
mcp_hot_0 = m_hot_0 * HEAT_CAPACITY_OF_WATER_JPERKGK
mcp_cold_0 = mcp_hot_0 * (T_hot_in - T_hot_out) / ((T_hot_in - T_cold_in) * TANK_HEX_EFFECTIVENESS)
T_cold_out = Q_hot_0 / mcp_cold_0 + T_cold_in # todo: check if the number is realistic
dTm_0 = calc_dTm_HEX(T_hot_in, T_hot_out, T_cold_in, T_cold_out)
# Area heat exchange and UA_heating
Area_HEX_m2, UA_WperK = calc_area_HEX(Q_hot_0, dTm_0, U_COOL)
return Area_HEX_m2, UA_WperK
def calc_cold_storage_charge_HEX(mcp_cold_0, Q_cold_0, T_hot_in, T_cold_in, T_cold_out):
'''
:param mcp_cold_0: nominal capacity mass flow rate primary side
:param Q_cold_0: nominal cooling load
:param T_hot_in: nominal in temperature of secondary side
:param T_cold_in: nominal in temperature of primary side
:param T_cold_out: nominal out temperature of primary side
:return Area_HEX_m2: Heat exchanger area in [m2]
:return UA_WperK: UA_WperK [W/K]
'''
# nominal conditions on the tank side
mcp_hot_0 = mcp_cold_0 * (T_cold_out - T_cold_in) / ((T_hot_in - T_cold_in) * TANK_HEX_EFFECTIVENESS)
T_hot_out = T_hot_in - Q_cold_0 / mcp_hot_0 # todo: check if the number is realistic
dTm_0 = calc_dTm_HEX(T_hot_in, T_hot_out, T_cold_in, T_cold_out)
# Area heat exchange and UA_WperK
Area_HEX_m2, UA_WperK = calc_area_HEX(Q_cold_0, dTm_0, U_HEAT)
return Area_HEX_m2, UA_WperK