Explain the terms cooling load and cooling capacity

Assignment Help Other Subject

Reference no: EM132080537

FOOD PROCESSING PRINCIPLES FOOD REFRIGERATION ASSIGNMENT

Q1. (i) Compare the refrigerant properties of ammonia and Rf134a, by means of a summary table and some brief notes explaining the advantages of each.

(ii) Explain the terms "cooling load" and "cooling capacity". Use your definitions to explain how a cool room design for a static load might fail in practise.

(iii) What is an immersion refrigeration system? Use diagrams and notes to explain. What products is it suited best for?

Q2. Calculate the specific heat of a food product which consists of 70% water (of which 30% is frozen), and 30% dry solids (specific heat of 1.35 kJ/kg.K).

Q3. A food storage chamber requires a refrigeration system of 8.5 ton capacity when operating at an evaporator temperature of -15°C and a condenser temperature of 40°C. Refrigerant R134a is used. Determine:
(i) the system C.O.P.
(ii) the required refrigerant flow-rate
(iii) the rate of heat removal by the condenser
(iv) choose an appropriate motor size (assume efficiency c=0.85).
(v) attach a diagram showing your workings.

Q4. A 4 cm thick beef-steak is being frozen in a cold room at -18°C. The product has 73% moisture content, a density of 970 kg/m^-3, and a thermal conductivity (frozen) of 1.1 W/m.K. Estimate the freezing time using Planck's equation. The product has an initial freezing temperature of -1.75°C, and the movement of air in the room provides a convective heat-transfer coefficient of 7 W/m².K.

Reference no: EM132080537

Questions Cloud

Criminal justice agencies typically operate : Criminal justice agencies typically operate under the pretense that all of their members are one color, and that the uniform or job makes everyone brothers

Find recent news article regarding denial of service attack : If companies have both a BCP and a DRP in place do they need to have an incident response plan? Please explain.

Create a plan for your first fieldwork using given details : Create a plan for your first fieldwork to be conducted in Module 3, including the following details: The contact person for your fieldwork.

Generate an infinite geometric series : Then ask what also remains in circulation from the production of the previous year? What about from the year before that?

Explain the terms cooling load and cooling capacity : Food Processing Principles - Explain the terms cooling load and cooling capacity. Use your definitions to explain how a cool room design for a static load

Do biases influence your decision making : Give insight into your own personal findings based on your answers and the books answers. What did you find interesting?

The real difference between science and pseudoscience : Determine the key reasons why so many people might seem to be attracted to more pseudoscience-type claims.

Explain how an ffde is conducted : Explain how an FFDE is conducted. Include discussion of psychological tests that might be administered in an FFDE.

How is diversity defined in your organization : Explain the complexities of historic public personnel management (government by gentlemen to current). Think of an organization you are employed.

User Account

All Pages