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   "source": [
    "# Chapter 30:Efficiency, Running Cost and Carbon Footprint"
   ]
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   "metadata": {},
   "source": [
    "## Example 30.1,PAGE NUMBER:358"
   ]
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     "text": [
      "Boiler Running cost=53p per hour of heating.\n",
      "HP Running cost=45p per hour of heating.\n"
     ]
    }
   ],
   "source": [
    "# Variable declaration\n",
    "P=15;# kW\n",
    "n_b=85;# The effiency of the gas boiler in %\n",
    "SCOP=3;# An average or seasonal COP (SCOP) of heat pump\n",
    "\n",
    "# Calcualtion\n",
    "# For the gas boiler\n",
    "R_pf=17.65;# Rate of primary fuel use in kW\n",
    "m_co2=0.19;# The mass of carbon in kg\n",
    "R_co2=R_pf*m_co2;# Rate of CO_2 emission in kg/h\n",
    "# For example\n",
    "Gp=3;# p/kWh\n",
    "Rc=R_pf*Gp;# Boiler Running cost in p per hour of heating\n",
    "print\"Boiler Running cost=%2.0fp per hour of heating.\"%Rc\n",
    "# For heat pump\n",
    "T_R_pf=10;#  Rate of primary fuel use in kW (total)\n",
    "R_pf=5;# Rate of primary fuel use in kW\n",
    "m_co2=0.43;# The mass of carbon in kg\n",
    "R_co2=R_co2=R_pf*m_co2;# Rate of CO_2 emission in kg/h\n",
    "# For example\n",
    "Ep=9;# p/kWh\n",
    "Rc=R_pf*Ep;# HP Running cost in p per hour of heating\n",
    "print\"HP Running cost=%2.0fp per hour of heating.\"%Rc"
   ]
  }
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