It is proposed to install a heat pump to heat a Lifeboat Station by harvesting the energy available from a nearby beach. The Lifeboat station requires heating to keep the stored equipment dry and serviceable at an ambient station temperature of 25°C. The average temperature of the beach at the heat source installation depth of 2 metres is 5°C and the minimum temperature difference between the refrigerant and both the heat source (Beach) and the heat sink location (Lifeboat Station) is 5°C.

Assume the following operating conditions

• The Refrigerant used is 134a.
• The heat pump compressor process is 100% Isentropic.
• The refrigerant enters the compressor as a dry saturated vapour.
• No under cooling occurs at the condenser outlet.

i) Draw a fully annotated plant layout and plot the cycle on the relevant pressure-enthalpy chart marking on the chart the following:
a. The processes involved
b. Where the energy transfers occur and their direction