Chapter 21, Problem 21.1Q

a.

To determine

To Describe: Describe the central forced air cooling and heating system.

Explanation of Solution

Central forced air: It is the most commonly used cooling and heating system in today’s world.

It circulates the air with the help of duct or spaces provided around the device. It has a fan inside the system which helps the air to drive through the metal or plastic pipes which is commonly known as ducts. The air which might be hot or cool according to the requirement enters to the room through the ducts and provide hot and cool air to the room.

b.

To determine

To Describe: Describe the Hot Water cooling and heating system.

Explanation of Solution

Hot Water: In this system water is heated with the help of oil and gas fired boiler after that it is passed through the pipes to the convertors or radiators of the room. Fresh water is obtained to the boiler from the supply of the house. Water circulates or flow all around the combustion chambers and absorbs heat from them. To circulates the water through the entire system a circular pump is required in the system.

c.

To determine

To Describe: Describe the Heat pump cooling and heating system.

Explanation of Solution

Heat Pump: The central air forced heating and cooling system runs with the help of a circular refrigerator and a compressor system the whole assembly known as heat pump system. The heat around the building or structure is sucks and sent into the rooms through the pumps. This pumps supplies three times more heat as compare standard electric forced air system. The energy saves by the heat pumps is 30 to 50 % annually.

d.

To determine

To Describe: Describe the Zoned heating system.

Explanation of Solution

Zoned Heating: The zoned heating system operates with one thermostat and one heater per room. This does not require any ducts to operate but heaters are operated in the rooms. It allows the occupants that how much energy used in the room and amount of money and power spent in that energy.